chrome/browser/ui/browser.cc

   1 // Copyright 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "chrome/browser/ui/browser.h"
   6
   7 #if defined(OS_WIN)
   8 #include <windows.h>
   9 #include <shellapi.h>
  10 #endif  // defined(OS_WIN)
  11
  12 #include <algorithm>
  13 #include <string>
  14
  15 #include "base/base_paths.h"
  16 #include "base/bind.h"
  17 #include "base/command_line.h"
  18 #include "base/logging.h"
  19 #include "base/metrics/histogram.h"
  20 #include "base/path_service.h"
  21 #include "base/prefs/pref_service.h"
  22 #include "base/process/process_info.h"
  23 #include "base/strings/string_number_conversions.h"
  24 #include "base/strings/string_util.h"
  25 #include "base/strings/stringprintf.h"
  26 #include "base/strings/utf_string_conversions.h"
  27 #include "base/threading/thread.h"
  28 #include "base/threading/thread_restrictions.h"
  29 #include "base/time/time.h"
  30 #include "chrome/app/chrome_command_ids.h"
  31 #include "chrome/browser/app_mode/app_mode_utils.h"
  32 #include "chrome/browser/autofill/personal_data_manager_factory.h"
  33 #include "chrome/browser/background/background_contents_service.h"
  34 #include "chrome/browser/background/background_contents_service_factory.h"
  35 #include "chrome/browser/bookmarks/bookmark_model.h"
  36 #include "chrome/browser/bookmarks/bookmark_utils.h"
  37 #include "chrome/browser/browser_process.h"
  38 #include "chrome/browser/browser_shutdown.h"
  39 #include "chrome/browser/character_encoding.h"
  40 #include "chrome/browser/chrome_notification_types.h"
  41 #include "chrome/browser/chrome_page_zoom.h"
  42 #include "chrome/browser/content_settings/host_content_settings_map.h"
  43 #include "chrome/browser/content_settings/tab_specific_content_settings.h"
  44 #include "chrome/browser/custom_handlers/protocol_handler_registry.h"
  45 #include "chrome/browser/custom_handlers/protocol_handler_registry_factory.h"
  46 #include "chrome/browser/custom_handlers/register_protocol_handler_infobar_delegate.h"
  47 #include "chrome/browser/defaults.h"
  48 #include "chrome/browser/devtools/devtools_toggle_action.h"
  49 #include "chrome/browser/devtools/devtools_window.h"
  50 #include "chrome/browser/download/download_item_model.h"
  51 #include "chrome/browser/download/download_service.h"
  52 #include "chrome/browser/download/download_service_factory.h"
  53 #include "chrome/browser/download/download_shelf.h"
  54 #include "chrome/browser/extensions/browser_extension_window_controller.h"
  55 #include "chrome/browser/extensions/extension_prefs.h"
  56 #include "chrome/browser/extensions/extension_service.h"
  57 #include "chrome/browser/extensions/extension_system.h"
  58 #include "chrome/browser/extensions/tab_helper.h"
  59 #include "chrome/browser/favicon/favicon_tab_helper.h"
  60 #include "chrome/browser/file_select_helper.h"
  61 #include "chrome/browser/first_run/first_run.h"
  62 #include "chrome/browser/google/google_url_tracker.h"
  63 #include "chrome/browser/infobars/infobar_service.h"
  64 #include "chrome/browser/infobars/simple_alert_infobar_delegate.h"
  65 #include "chrome/browser/lifetime/application_lifetime.h"
  66 #include "chrome/browser/notifications/notification_ui_manager.h"
  67 #include "chrome/browser/pepper_broker_infobar_delegate.h"
  68 #include "chrome/browser/prefs/incognito_mode_prefs.h"
  69 #include "chrome/browser/profiles/profile.h"
  70 #include "chrome/browser/profiles/profile_destroyer.h"
  71 #include "chrome/browser/profiles/profile_manager.h"
  72 #include "chrome/browser/profiles/profile_metrics.h"
  73 #include "chrome/browser/repost_form_warning_controller.h"
  74 #include "chrome/browser/search/search.h"
  75 #include "chrome/browser/sessions/session_service.h"
  76 #include "chrome/browser/sessions/session_service_factory.h"
  77 #include "chrome/browser/sessions/session_tab_helper.h"
  78 #include "chrome/browser/sessions/session_types.h"
  79 #include "chrome/browser/sessions/tab_restore_service.h"
  80 #include "chrome/browser/sessions/tab_restore_service_factory.h"
  81 #include "chrome/browser/sync/profile_sync_service.h"
  82 #include "chrome/browser/sync/profile_sync_service_factory.h"
  83 #include "chrome/browser/sync/sync_ui_util.h"
  84 #include "chrome/browser/tab_contents/background_contents.h"
  85 #include "chrome/browser/tab_contents/retargeting_details.h"
  86 #include "chrome/browser/tab_contents/tab_util.h"
  87 #include "chrome/browser/themes/theme_service.h"
  88 #include "chrome/browser/themes/theme_service_factory.h"
  89 #include "chrome/browser/translate/translate_tab_helper.h"
  90 #include "chrome/browser/ui/app_modal_dialogs/javascript_dialog_manager.h"
  91 #include "chrome/browser/ui/autofill/tab_autofill_manager_delegate.h"
  92 #include "chrome/browser/ui/blocked_content/popup_blocker_tab_helper.h"
  93 #include "chrome/browser/ui/bookmarks/bookmark_tab_helper.h"
  94 #include "chrome/browser/ui/browser_command_controller.h"
  95 #include "chrome/browser/ui/browser_commands.h"
  96 #include "chrome/browser/ui/browser_content_setting_bubble_model_delegate.h"
  97 #include "chrome/browser/ui/browser_dialogs.h"
  98 #include "chrome/browser/ui/browser_finder.h"
  99 #include "chrome/browser/ui/browser_instant_controller.h"
 100 #include "chrome/browser/ui/browser_iterator.h"
 101 #include "chrome/browser/ui/browser_language_state_observer.h"
 102 #include "chrome/browser/ui/browser_list.h"
 103 #include "chrome/browser/ui/browser_navigator.h"
 104 #include "chrome/browser/ui/browser_tab_contents.h"
 105 #include "chrome/browser/ui/browser_tab_restore_service_delegate.h"
 106 #include "chrome/browser/ui/browser_tab_strip_model_delegate.h"
 107 #include "chrome/browser/ui/browser_tabstrip.h"
 108 #include "chrome/browser/ui/browser_toolbar_model_delegate.h"
 109 #include "chrome/browser/ui/browser_ui_prefs.h"
 110 #include "chrome/browser/ui/browser_window.h"
 111 #include "chrome/browser/ui/chrome_pages.h"
 112 #include "chrome/browser/ui/chrome_select_file_policy.h"
 113 #include "chrome/browser/ui/fast_unload_controller.h"
 114 #include "chrome/browser/ui/find_bar/find_bar.h"
 115 #include "chrome/browser/ui/find_bar/find_bar_controller.h"
 116 #include "chrome/browser/ui/find_bar/find_tab_helper.h"
 117 #include "chrome/browser/ui/fullscreen/fullscreen_controller.h"
 118 #include "chrome/browser/ui/global_error/global_error.h"
 119 #include "chrome/browser/ui/global_error/global_error_service.h"
 120 #include "chrome/browser/ui/global_error/global_error_service_factory.h"
 121 #include "chrome/browser/ui/media_utils.h"
 122 #include "chrome/browser/ui/omnibox/location_bar.h"
 123 #include "chrome/browser/ui/search/search_delegate.h"
 124 #include "chrome/browser/ui/search/search_model.h"
 125 #include "chrome/browser/ui/search/search_tab_helper.h"
 126 #include "chrome/browser/ui/search_engines/search_engine_tab_helper.h"
 127 #include "chrome/browser/ui/singleton_tabs.h"
 128 #include "chrome/browser/ui/status_bubble.h"
 129 #include "chrome/browser/ui/sync/browser_synced_window_delegate.h"
 130 #include "chrome/browser/ui/tab_contents/core_tab_helper.h"
 131 #include "chrome/browser/ui/tab_modal_confirm_dialog.h"
 132 #include "chrome/browser/ui/tabs/dock_info.h"
 133 #include "chrome/browser/ui/tabs/tab_menu_model.h"
 134 #include "chrome/browser/ui/tabs/tab_strip_model.h"
 135 #include "chrome/browser/ui/toolbar/toolbar_model_impl.h"
 136 #include "chrome/browser/ui/unload_controller.h"
 137 #include "chrome/browser/ui/validation_message_bubble.h"
 138 #include "chrome/browser/ui/web_applications/web_app_ui.h"
 139 #include "chrome/browser/ui/webui/signin/login_ui_service.h"
 140 #include "chrome/browser/ui/webui/signin/login_ui_service_factory.h"
 141 #include "chrome/browser/ui/window_sizer/window_sizer.h"
 142 #include "chrome/browser/ui/zoom/zoom_controller.h"
 143 #include "chrome/browser/upgrade_detector.h"
 144 #include "chrome/browser/web_applications/web_app.h"
 145 #include "chrome/common/chrome_constants.h"
 146 #include "chrome/common/chrome_switches.h"
 147 #include "chrome/common/custom_handlers/protocol_handler.h"
 148 #include "chrome/common/net/url_fixer_upper.h"
 149 #include "chrome/common/pref_names.h"
 150 #include "chrome/common/profiling.h"
 151 #include "chrome/common/search_types.h"
 152 #include "chrome/common/url_constants.h"
 153 #include "components/startup_metric_utils/startup_metric_utils.h"
 154 #include "components/web_modal/web_contents_modal_dialog_manager.h"
 155 #include "content/public/browser/devtools_manager.h"
 156 #include "content/public/browser/download_item.h"
 157 #include "content/public/browser/download_manager.h"
 158 #include "content/public/browser/interstitial_page.h"
 159 #include "content/public/browser/invalidate_type.h"
 160 #include "content/public/browser/navigation_controller.h"
 161 #include "content/public/browser/navigation_entry.h"
 162 #include "content/public/browser/notification_details.h"
 163 #include "content/public/browser/notification_service.h"
 164 #include "content/public/browser/plugin_service.h"
 165 #include "content/public/browser/render_process_host.h"
 166 #include "content/public/browser/render_view_host.h"
 167 #include "content/public/browser/render_widget_host_view.h"
 168 #include "content/public/browser/site_instance.h"
 169 #include "content/public/browser/user_metrics.h"
 170 #include "content/public/browser/web_contents.h"
 171 #include "content/public/browser/web_contents_view.h"
 172 #include "content/public/common/content_switches.h"
 173 #include "content/public/common/page_zoom.h"
 174 #include "content/public/common/renderer_preferences.h"
 175 #include "content/public/common/webplugininfo.h"
 176 #include "extensions/common/constants.h"
 177 #include "extensions/common/extension.h"
 178 #include "extensions/common/manifest_handlers/background_info.h"
 179 #include "grit/chromium_strings.h"
 180 #include "grit/generated_resources.h"
 181 #include "grit/locale_settings.h"
 182 #include "grit/theme_resources.h"
 183 #include "net/base/net_util.h"
 184 #include "net/base/registry_controlled_domains/registry_controlled_domain.h"
 185 #include "net/cookies/cookie_monster.h"
 186 #include "net/url_request/url_request_context.h"
 187 #include "third_party/WebKit/public/web/WebWindowFeatures.h"
 188 #include "ui/base/l10n/l10n_util.h"
 189 #include "ui/base/window_open_disposition.h"
 190 #include "ui/gfx/point.h"
 191 #include "ui/shell_dialogs/selected_file_info.h"
 192
 193 #if defined(OS_WIN)
 194 #include "base/win/metro.h"
 195 #include "chrome/browser/ssl/ssl_error_info.h"
 196 #include "chrome/browser/task_manager/task_manager.h"
 197 #include "chrome/browser/ui/view_ids.h"
 198 #include "components/autofill/core/browser/autofill_ie_toolbar_import_win.h"
 199 #include "ui/base/win/shell.h"
 200 #endif  // OS_WIN
 201
 202 #if defined(OS_CHROMEOS)
 203 #include "chrome/browser/chromeos/drive/file_system_util.h"
 204 #endif
 205
 206 #if defined(USE_ASH)
 207 #include "ash/ash_switches.h"
 208 #endif
 209
 210 using base::TimeDelta;
 211 using base::UserMetricsAction;
 212 using content::NativeWebKeyboardEvent;
 213 using content::NavigationController;
 214 using content::NavigationEntry;
 215 using content::OpenURLParams;
 216 using content::PluginService;
 217 using content::Referrer;
 218 using content::RenderWidgetHostView;
 219 using content::SiteInstance;
 220 using content::WebContents;
 221 using extensions::Extension;
 222 using ui::WebDialogDelegate;
 223 using web_modal::WebContentsModalDialogManager;
 224 using blink::WebWindowFeatures;
 225
 226 ///////////////////////////////////////////////////////////////////////////////
 227
 228 namespace {
 229
 230 // How long we wait before updating the browser chrome while loading a page.
 231 const int kUIUpdateCoalescingTimeMS = 200;
 232
 233 BrowserWindow* CreateBrowserWindow(Browser* browser) {
 234   return BrowserWindow::CreateBrowserWindow(browser);
 235 }
 236
 237 // Is the fast tab unload experiment enabled?
 238 bool IsFastTabUnloadEnabled() {
 239   return CommandLine::ForCurrentProcess()->HasSwitch(
 240         switches::kEnableFastUnload);
 241 }
 242
 243 }  // namespace
 244
 245 ////////////////////////////////////////////////////////////////////////////////
 246 // Browser, CreateParams:
 247
 248 Browser::CreateParams::CreateParams(Profile* profile,
 249                                     chrome::HostDesktopType host_desktop_type)
 250     : type(TYPE_TABBED),
 251       profile(profile),
 252       host_desktop_type(host_desktop_type),
 253       app_type(APP_TYPE_HOST),
 254       initial_show_state(ui::SHOW_STATE_DEFAULT),
 255       is_session_restore(false),
 256       window(NULL) {
 257 }
 258
 259 Browser::CreateParams::CreateParams(Type type,
 260                                     Profile* profile,
 261                                     chrome::HostDesktopType host_desktop_type)
 262     : type(type),
 263       profile(profile),
 264       host_desktop_type(host_desktop_type),
 265       app_type(APP_TYPE_HOST),
 266       initial_show_state(ui::SHOW_STATE_DEFAULT),
 267       is_session_restore(false),
 268       window(NULL) {
 269 }
 270
 271 // static
 272 Browser::CreateParams Browser::CreateParams::CreateForApp(
 273     Type type,
 274     const std::string& app_name,
 275     const gfx::Rect& window_bounds,
 276     Profile* profile,
 277     chrome::HostDesktopType host_desktop_type) {
 278   DCHECK(type != TYPE_TABBED);
 279   DCHECK(!app_name.empty());
 280
 281   CreateParams params(type, profile, host_desktop_type);
 282   params.app_name = app_name;
 283   params.app_type = APP_TYPE_CHILD;
 284   params.initial_bounds = window_bounds;
 285
 286   return params;
 287 }
 288
 289 // static
 290 Browser::CreateParams Browser::CreateParams::CreateForDevTools(
 291     Profile* profile,
 292     chrome::HostDesktopType host_desktop_type) {
 293   CreateParams params(TYPE_POPUP, profile, host_desktop_type);
 294   params.app_name = DevToolsWindow::kDevToolsApp;
 295   return params;
 296 }
 297
 298 ////////////////////////////////////////////////////////////////////////////////
 299 // Browser, InterstitialObserver:
 300
 301 class Browser::InterstitialObserver : public content::WebContentsObserver {
 302  public:
 303   InterstitialObserver(Browser* browser, content::WebContents* web_contents)
 304       : WebContentsObserver(web_contents),
 305         browser_(browser) {
 306   }
 307
 308   using content::WebContentsObserver::web_contents;
 309
 310   virtual void DidAttachInterstitialPage() OVERRIDE {
 311     browser_->UpdateBookmarkBarState(BOOKMARK_BAR_STATE_CHANGE_TAB_STATE);
 312   }
 313
 314   virtual void DidDetachInterstitialPage() OVERRIDE {
 315     browser_->UpdateBookmarkBarState(BOOKMARK_BAR_STATE_CHANGE_TAB_STATE);
 316   }
 317
 318  private:
 319   Browser* browser_;
 320
 321   DISALLOW_COPY_AND_ASSIGN(InterstitialObserver);
 322 };
 323
 324 ///////////////////////////////////////////////////////////////////////////////
 325 // Browser, Constructors, Creation, Showing:
 326
 327 Browser::Browser(const CreateParams& params)
 328     : type_(params.type),
 329       profile_(params.profile),
 330       window_(NULL),
 331       tab_strip_model_delegate_(new chrome::BrowserTabStripModelDelegate(this)),
 332       tab_strip_model_(new TabStripModel(tab_strip_model_delegate_.get(),
 333                                          params.profile)),
 334       app_name_(params.app_name),
 335       app_type_(params.app_type),
 336       cancel_download_confirmation_state_(NOT_PROMPTED),
 337       override_bounds_(params.initial_bounds),
 338       initial_show_state_(params.initial_show_state),
 339       is_session_restore_(params.is_session_restore),
 340       host_desktop_type_(BrowserWindow::AdjustHostDesktopType(
 341           params.host_desktop_type)),
 342       content_setting_bubble_model_delegate_(
 343           new BrowserContentSettingBubbleModelDelegate(this)),
 344       toolbar_model_delegate_(new BrowserToolbarModelDelegate(this)),
 345       tab_restore_service_delegate_(new BrowserTabRestoreServiceDelegate(this)),
 346       synced_window_delegate_(new BrowserSyncedWindowDelegate(this)),
 347       bookmark_bar_state_(BookmarkBar::HIDDEN),
 348       command_controller_(new chrome::BrowserCommandController(
 349           this, g_browser_process->profile_manager())),
 350       window_has_shown_(false),
 351       chrome_updater_factory_(this),
 352       weak_factory_(this),
 353       language_state_observer_(new BrowserLanguageStateObserver(this)) {
 354   // If this causes a crash then a window is being opened using a profile type
 355   // that is disallowed by policy. The crash prevents the disabled window type
 356   // from opening at all, but the path that triggered it should be fixed.
 357   CHECK(IncognitoModePrefs::CanOpenBrowser(profile_));
 358   CHECK(!profile_->IsGuestSession() || profile_->IsOffTheRecord())
 359       << "Only off the record browser may be opened in guest mode";
 360
 361   // TODO(jeremy): Move to initializer list once flag is removed.
 362   if (IsFastTabUnloadEnabled())
 363     fast_unload_controller_.reset(new chrome::FastUnloadController(this));
 364   else
 365     unload_controller_.reset(new chrome::UnloadController(this));
 366
 367   if (!app_name_.empty())
 368     chrome::RegisterAppPrefs(app_name_, profile_);
 369   tab_strip_model_->AddObserver(this);
 370
 371   toolbar_model_.reset(new ToolbarModelImpl(toolbar_model_delegate_.get()));
 372   search_model_.reset(new SearchModel());
 373   search_delegate_.reset(new SearchDelegate(search_model_.get()));
 374
 375   registrar_.Add(this, chrome::NOTIFICATION_EXTENSION_LOADED,
 376                  content::Source<Profile>(profile_->GetOriginalProfile()));
 377   registrar_.Add(this, chrome::NOTIFICATION_EXTENSION_UNLOADED,
 378                  content::Source<Profile>(profile_->GetOriginalProfile()));
 379   registrar_.Add(this, chrome::NOTIFICATION_EXTENSION_UNINSTALLED,
 380                  content::Source<Profile>(profile_->GetOriginalProfile()));
 381   registrar_.Add(this, chrome::NOTIFICATION_EXTENSION_PROCESS_TERMINATED,
 382                  content::NotificationService::AllSources());
 383 #if defined(ENABLE_THEMES)
 384   registrar_.Add(
 385       this, chrome::NOTIFICATION_BROWSER_THEME_CHANGED,
 386       content::Source<ThemeService>(
 387           ThemeServiceFactory::GetForProfile(profile_)));
 388 #endif
 389   registrar_.Add(this, chrome::NOTIFICATION_WEB_CONTENT_SETTINGS_CHANGED,
 390                  content::NotificationService::AllSources());
 391
 392   profile_pref_registrar_.Init(profile_->GetPrefs());
 393   profile_pref_registrar_.Add(
 394       prefs::kDevToolsDisabled,
 395       base::Bind(&Browser::OnDevToolsDisabledChanged, base::Unretained(this)));
 396   profile_pref_registrar_.Add(
 397       prefs::kShowBookmarkBar,
 398       base::Bind(&Browser::UpdateBookmarkBarState, base::Unretained(this),
 399                  BOOKMARK_BAR_STATE_CHANGE_PREF_CHANGE));
 400
 401   BrowserList::AddBrowser(this);
 402
 403   // NOTE: These prefs all need to be explicitly destroyed in the destructor
 404   // or you'll get a nasty surprise when you run the incognito tests.
 405   encoding_auto_detect_.Init(prefs::kWebKitUsesUniversalDetector,
 406                              profile_->GetPrefs());
 407
 408   if (chrome::IsInstantExtendedAPIEnabled() && is_type_tabbed())
 409     instant_controller_.reset(new BrowserInstantController(this));
 410
 411   UpdateBookmarkBarState(BOOKMARK_BAR_STATE_CHANGE_INIT);
 412
 413   ProfileMetrics::LogProfileLaunch(profile_);
 414
 415   window_ = params.window ? params.window : CreateBrowserWindow(this);
 416
 417   // Create the extension window controller before sending notifications.
 418   extension_window_controller_.reset(
 419       new BrowserExtensionWindowController(this));
 420
 421   SessionService* session_service =
 422       SessionServiceFactory::GetForProfileForSessionRestore(profile_);
 423   if (session_service)
 424     session_service->WindowOpened(this);
 425
 426   // TODO(beng): Move BrowserList::AddBrowser() to the end of this function and
 427   //             replace uses of this with BL's notifications.
 428   content::NotificationService::current()->Notify(
 429       chrome::NOTIFICATION_BROWSER_WINDOW_READY,
 430       content::Source<Browser>(this),
 431       content::NotificationService::NoDetails());
 432
 433   // TODO(beng): move to ChromeBrowserMain:
 434   if (first_run::ShouldDoPersonalDataManagerFirstRun()) {
 435 #if defined(OS_WIN)
 436     // Notify PDM that this is a first run.
 437     ImportAutofillDataWin(
 438         autofill::PersonalDataManagerFactory::GetForProfile(profile_));
 439 #endif  // defined(OS_WIN)
 440   }
 441
 442   fullscreen_controller_.reset(new FullscreenController(this));
 443 }
 444
 445 Browser::~Browser() {
 446   // The tab strip should not have any tabs at this point.
 447   if (!browser_shutdown::ShuttingDownWithoutClosingBrowsers())
 448     DCHECK(tab_strip_model_->empty());
 449
 450   tab_strip_model_->RemoveObserver(this);
 451
 452   // Destroy the BrowserCommandController before removing the browser, so that
 453   // it doesn't act on any notifications that are sent as a result of removing
 454   // the browser.
 455   command_controller_.reset();
 456   BrowserList::RemoveBrowser(this);
 457
 458   SessionService* session_service =
 459       SessionServiceFactory::GetForProfile(profile_);
 460   if (session_service)
 461     session_service->WindowClosed(session_id_);
 462
 463   TabRestoreService* tab_restore_service =
 464       TabRestoreServiceFactory::GetForProfile(profile());
 465   if (tab_restore_service)
 466     tab_restore_service->BrowserClosed(tab_restore_service_delegate());
 467
 468 #if !defined(OS_MACOSX)
 469   if (!chrome::GetTotalBrowserCountForProfile(profile_)) {
 470     // We're the last browser window with this profile. We need to nuke the
 471     // TabRestoreService, which will start the shutdown of the
 472     // NavigationControllers and allow for proper shutdown. If we don't do this
 473     // chrome won't shutdown cleanly, and may end up crashing when some
 474     // thread tries to use the IO thread (or another thread) that is no longer
 475     // valid.
 476     // This isn't a valid assumption for Mac OS, as it stays running after
 477     // the last browser has closed. The Mac equivalent is in its app
 478     // controller.
 479     TabRestoreServiceFactory::ResetForProfile(profile_);
 480   }
 481 #endif
 482
 483   profile_pref_registrar_.RemoveAll();
 484
 485   encoding_auto_detect_.Destroy();
 486
 487   // Destroy BrowserExtensionWindowController before the incognito profile
 488   // is destroyed to make sure the chrome.windows.onRemoved event is sent.
 489   extension_window_controller_.reset();
 490
 491   // Destroy BrowserInstantController before the incongnito profile is destroyed
 492   // because the InstantController destructor depends on this profile.
 493   instant_controller_.reset();
 494
 495   if (profile_->IsOffTheRecord() &&
 496       !BrowserList::IsOffTheRecordSessionActiveForProfile(profile_)) {
 497     // An incognito profile is no longer needed, this indirectly frees
 498     // its cache and cookies once it gets destroyed at the appropriate time.
 499     ProfileDestroyer::DestroyProfileWhenAppropriate(profile_);
 500   }
 501
 502   // There may be pending file dialogs, we need to tell them that we've gone
 503   // away so they don't try and call back to us.
 504   if (select_file_dialog_.get())
 505     select_file_dialog_->ListenerDestroyed();
 506
 507   int num_downloads;
 508   if (OkToCloseWithInProgressDownloads(&num_downloads) ==
 509           DOWNLOAD_CLOSE_BROWSER_SHUTDOWN &&
 510       !browser_defaults::kBrowserAliveWithNoWindows) {
 511     DownloadService::CancelAllDownloads();
 512   }
 513 }
 514
 515 ///////////////////////////////////////////////////////////////////////////////
 516 // Getters & Setters
 517
 518 FindBarController* Browser::GetFindBarController() {
 519   if (!find_bar_controller_.get()) {
 520     FindBar* find_bar = window_->CreateFindBar();
 521     find_bar_controller_.reset(new FindBarController(find_bar));
 522     find_bar->SetFindBarController(find_bar_controller_.get());
 523     find_bar_controller_->ChangeWebContents(
 524         tab_strip_model_->GetActiveWebContents());
 525     find_bar_controller_->find_bar()->MoveWindowIfNecessary(gfx::Rect(), true);
 526   }
 527   return find_bar_controller_.get();
 528 }
 529
 530 bool Browser::HasFindBarController() const {
 531   return find_bar_controller_.get() != NULL;
 532 }
 533
 534 bool Browser::is_app() const {
 535   return !app_name_.empty();
 536 }
 537
 538 bool Browser::is_devtools() const {
 539   return app_name_ == DevToolsWindow::kDevToolsApp;
 540 }
 541
 542 ///////////////////////////////////////////////////////////////////////////////
 543 // Browser, State Storage and Retrieval for UI:
 544
 545 gfx::Image Browser::GetCurrentPageIcon() const {
 546   WebContents* web_contents = tab_strip_model_->GetActiveWebContents();
 547   // |web_contents| can be NULL since GetCurrentPageIcon() is called by the
 548   // window during the window's creation (before tabs have been added).
 549   FaviconTabHelper* favicon_tab_helper =
 550       web_contents ? FaviconTabHelper::FromWebContents(web_contents) : NULL;
 551   return favicon_tab_helper ? favicon_tab_helper->GetFavicon() : gfx::Image();
 552 }
 553
 554 base::string16 Browser::GetWindowTitleForCurrentTab() const {
 555   WebContents* contents = tab_strip_model_->GetActiveWebContents();
 556   base::string16 title;
 557
 558   // |contents| can be NULL because GetWindowTitleForCurrentTab is called by the
 559   // window during the window's creation (before tabs have been added).
 560   if (contents) {
 561     title = contents->GetTitle();
 562     FormatTitleForDisplay(&title);
 563   }
 564   if (title.empty())
 565     title = CoreTabHelper::GetDefaultTitle();
 566
 567 #if defined(OS_MACOSX)
 568   // On Mac, we don't want to suffix the page title with
 569   // the application name.
 570   return title;
 571 #elif defined(USE_ASH)
 572   // On Ash, we don't want to suffix the page title with the application name,
 573   // but on Windows, where USE_ASH can also be true, we still want the prefix
 574   // on desktop.
 575   if (host_desktop_type() == chrome::HOST_DESKTOP_TYPE_ASH)
 576     return title;
 577 #endif
 578   // Don't append the app name to window titles on app frames and app popups
 579   return is_app() ?
 580       title :
 581       l10n_util::GetStringFUTF16(IDS_BROWSER_WINDOW_TITLE_FORMAT, title);
 582 }
 583
 584 // static
 585 void Browser::FormatTitleForDisplay(base::string16* title) {
 586   size_t current_index = 0;
 587   size_t match_index;
 588   while ((match_index = title->find(L'\n', current_index)) !=
 589          base::string16::npos) {
 590     title->replace(match_index, 1, base::string16());
 591     current_index = match_index;
 592   }
 593 }
 594
 595 ///////////////////////////////////////////////////////////////////////////////
 596 // Browser, OnBeforeUnload handling:
 597
 598 bool Browser::ShouldCloseWindow() {
 599   if (!CanCloseWithInProgressDownloads())
 600     return false;
 601
 602   if (IsFastTabUnloadEnabled())
 603     return fast_unload_controller_->ShouldCloseWindow();
 604   return unload_controller_->ShouldCloseWindow();
 605 }
 606
 607 bool Browser::CallBeforeUnloadHandlers(
 608     const base::Callback<void(bool)>& on_close_confirmed) {
 609   cancel_download_confirmation_state_ = RESPONSE_RECEIVED;
 610   if (IsFastTabUnloadEnabled()) {
 611     return fast_unload_controller_->CallBeforeUnloadHandlers(
 612         on_close_confirmed);
 613   }
 614   return unload_controller_->CallBeforeUnloadHandlers(on_close_confirmed);
 615 }
 616
 617 void Browser::ResetBeforeUnloadHandlers() {
 618   cancel_download_confirmation_state_ = NOT_PROMPTED;
 619   if (IsFastTabUnloadEnabled())
 620     fast_unload_controller_->ResetBeforeUnloadHandlers();
 621   else
 622     unload_controller_->ResetBeforeUnloadHandlers();
 623 }
 624
 625 bool Browser::HasCompletedUnloadProcessing() const {
 626   DCHECK(IsFastTabUnloadEnabled());
 627   return fast_unload_controller_->HasCompletedUnloadProcessing();
 628 }
 629
 630 bool Browser::IsAttemptingToCloseBrowser() const {
 631   if (IsFastTabUnloadEnabled())
 632     return fast_unload_controller_->is_attempting_to_close_browser();
 633   return unload_controller_->is_attempting_to_close_browser();
 634 }
 635
 636 void Browser::OnWindowClosing() {
 637   if (!ShouldCloseWindow())
 638     return;
 639
 640   // Application should shutdown on last window close if the user is explicitly
 641   // trying to quit, or if there is nothing keeping the browser alive (such as
 642   // AppController on the Mac, or BackgroundContentsService for background
 643   // pages).
 644   bool should_quit_if_last_browser =
 645       browser_shutdown::IsTryingToQuit() || !chrome::WillKeepAlive();
 646
 647   if (should_quit_if_last_browser && chrome::ShouldStartShutdown(this))
 648     browser_shutdown::OnShutdownStarting(browser_shutdown::WINDOW_CLOSE);
 649
 650   // Don't use GetForProfileIfExisting here, we want to force creation of the
 651   // session service so that user can restore what was open.
 652   SessionService* session_service =
 653       SessionServiceFactory::GetForProfile(profile());
 654   if (session_service)
 655     session_service->WindowClosing(session_id());
 656
 657   TabRestoreService* tab_restore_service =
 658       TabRestoreServiceFactory::GetForProfile(profile());
 659
 660 #if defined(USE_AURA)
 661   if (tab_restore_service && is_app() && !is_devtools())
 662     tab_restore_service->BrowserClosing(tab_restore_service_delegate());
 663 #endif
 664
 665   if (tab_restore_service && is_type_tabbed() && tab_strip_model_->count())
 666     tab_restore_service->BrowserClosing(tab_restore_service_delegate());
 667
 668   // TODO(sky): convert session/tab restore to use notification.
 669   content::NotificationService::current()->Notify(
 670       chrome::NOTIFICATION_BROWSER_CLOSING,
 671       content::Source<Browser>(this),
 672       content::NotificationService::NoDetails());
 673
 674   if (!IsFastTabUnloadEnabled())
 675     tab_strip_model_->CloseAllTabs();
 676 }
 677
 678 ////////////////////////////////////////////////////////////////////////////////
 679 // In-progress download termination handling:
 680
 681 void Browser::InProgressDownloadResponse(bool cancel_downloads) {
 682   if (cancel_downloads) {
 683     cancel_download_confirmation_state_ = RESPONSE_RECEIVED;
 684     chrome::CloseWindow(this);
 685     return;
 686   }
 687
 688   // Sets the confirmation state to NOT_PROMPTED so that if the user tries to
 689   // close again we'll show the warning again.
 690   cancel_download_confirmation_state_ = NOT_PROMPTED;
 691
 692   // Show the download page so the user can figure-out what downloads are still
 693   // in-progress.
 694   chrome::ShowDownloads(this);
 695 }
 696
 697 Browser::DownloadClosePreventionType Browser::OkToCloseWithInProgressDownloads(
 698     int* num_downloads_blocking) const {
 699   DCHECK(num_downloads_blocking);
 700   *num_downloads_blocking = 0;
 701
 702   // If we're not running a full browser process with a profile manager
 703   // (testing), it's ok to close the browser.
 704   if (!g_browser_process->profile_manager())
 705     return DOWNLOAD_CLOSE_OK;
 706
 707   int total_download_count =
 708       DownloadService::NonMaliciousDownloadCountAllProfiles();
 709   if (total_download_count == 0)
 710     return DOWNLOAD_CLOSE_OK;   // No downloads; can definitely close.
 711
 712   // Figure out how many windows are open total, and associated with this
 713   // profile, that are relevant for the ok-to-close decision.
 714   int profile_window_count = 0;
 715   int total_window_count = 0;
 716   for (chrome::BrowserIterator it; !it.done(); it.Next()) {
 717     // Don't count this browser window or any other in the process of closing.
 718     Browser* const browser = *it;
 719     // Window closing may be delayed, and windows that are in the process of
 720     // closing don't count against our totals.
 721     if (browser == this || browser->IsAttemptingToCloseBrowser())
 722       continue;
 723
 724     if (it->profile() == profile())
 725       profile_window_count++;
 726     total_window_count++;
 727   }
 728
 729   // If there aren't any other windows, we're at browser shutdown,
 730   // which would cancel all current downloads.
 731   if (total_window_count == 0) {
 732     *num_downloads_blocking = total_download_count;
 733     return DOWNLOAD_CLOSE_BROWSER_SHUTDOWN;
 734   }
 735
 736   // If there aren't any other windows on our profile, and we're an incognito
 737   // profile, and there are downloads associated with that profile,
 738   // those downloads would be cancelled by our window (-> profile) close.
 739   DownloadService* download_service =
 740       DownloadServiceFactory::GetForBrowserContext(profile());
 741   if ((profile_window_count == 0) &&
 742       (download_service->NonMaliciousDownloadCount() > 0) &&
 743       profile()->IsOffTheRecord()) {
 744     *num_downloads_blocking = download_service->NonMaliciousDownloadCount();
 745     return DOWNLOAD_CLOSE_LAST_WINDOW_IN_INCOGNITO_PROFILE;
 746   }
 747
 748   // Those are the only conditions under which we will block shutdown.
 749   return DOWNLOAD_CLOSE_OK;
 750 }
 751
 752 ////////////////////////////////////////////////////////////////////////////////
 753 // Browser, Tab adding/showing functions:
 754
 755 void Browser::WindowFullscreenStateChanged() {
 756   fullscreen_controller_->WindowFullscreenStateChanged();
 757   command_controller_->FullscreenStateChanged();
 758   UpdateBookmarkBarState(BOOKMARK_BAR_STATE_CHANGE_TOGGLE_FULLSCREEN);
 759 }
 760
 761 void Browser::VisibleSSLStateChanged(content::WebContents* web_contents) {
 762   // When the current tab's SSL state changes, we need to update the URL
 763   // bar to reflect the new state.
 764   DCHECK(web_contents);
 765   if (tab_strip_model_->GetActiveWebContents() == web_contents)
 766     UpdateToolbar(false);
 767 }
 768
 769 void Browser::OnWebContentsInstantSupportDisabled(
 770     const content::WebContents* web_contents) {
 771   DCHECK(web_contents);
 772   if (tab_strip_model_->GetActiveWebContents() == web_contents)
 773     UpdateToolbar(false);
 774 }
 775
 776 ///////////////////////////////////////////////////////////////////////////////
 777 // Browser, Assorted browser commands:
 778
 779 void Browser::ToggleFullscreenModeWithExtension(const GURL& extension_url) {
 780   fullscreen_controller_->ToggleFullscreenModeWithExtension(extension_url);
 781 }
 782
 783 bool Browser::SupportsWindowFeature(WindowFeature feature) const {
 784   return SupportsWindowFeatureImpl(feature, true);
 785 }
 786
 787 bool Browser::CanSupportWindowFeature(WindowFeature feature) const {
 788   return SupportsWindowFeatureImpl(feature, false);
 789 }
 790
 791 void Browser::ToggleEncodingAutoDetect() {
 792   content::RecordAction(UserMetricsAction("AutoDetectChange"));
 793   encoding_auto_detect_.SetValue(!encoding_auto_detect_.GetValue());
 794   // If "auto detect" is turned on, then any current override encoding
 795   // is cleared. This also implicitly performs a reload.
 796   // OTOH, if "auto detect" is turned off, we don't change the currently
 797   // active encoding.
 798   if (encoding_auto_detect_.GetValue()) {
 799     WebContents* contents = tab_strip_model_->GetActiveWebContents();
 800     if (contents)
 801       contents->ResetOverrideEncoding();
 802   }
 803 }
 804
 805 void Browser::OverrideEncoding(int encoding_id) {
 806   content::RecordAction(UserMetricsAction("OverrideEncoding"));
 807   const std::string selected_encoding =
 808       CharacterEncoding::GetCanonicalEncodingNameByCommandId(encoding_id);
 809   WebContents* contents = tab_strip_model_->GetActiveWebContents();
 810   if (!selected_encoding.empty() && contents)
 811      contents->SetOverrideEncoding(selected_encoding);
 812   // Update the list of recently selected encodings.
 813   std::string new_selected_encoding_list;
 814   if (CharacterEncoding::UpdateRecentlySelectedEncoding(
 815         profile_->GetPrefs()->GetString(prefs::kRecentlySelectedEncoding),
 816         encoding_id,
 817         &new_selected_encoding_list)) {
 818     profile_->GetPrefs()->SetString(prefs::kRecentlySelectedEncoding,
 819                                     new_selected_encoding_list);
 820   }
 821 }
 822
 823 void Browser::OpenFile() {
 824   content::RecordAction(UserMetricsAction("OpenFile"));
 825   select_file_dialog_ = ui::SelectFileDialog::Create(
 826       this, new ChromeSelectFilePolicy(
 827           tab_strip_model_->GetActiveWebContents()));
 828
 829   const base::FilePath directory = profile_->last_selected_directory();
 830
 831   // TODO(beng): figure out how to juggle this.
 832   gfx::NativeWindow parent_window = window_->GetNativeWindow();
 833   ui::SelectFileDialog::FileTypeInfo file_types;
 834   file_types.support_drive = true;
 835   select_file_dialog_->SelectFile(ui::SelectFileDialog::SELECT_OPEN_FILE,
 836                                   base::string16(),
 837                                   directory,
 838                                   &file_types,
 839                                   0,
 840                                   base::FilePath::StringType(),
 841                                   parent_window,
 842                                   NULL);
 843 }
 844
 845 void Browser::UpdateDownloadShelfVisibility(bool visible) {
 846   if (GetStatusBubble())
 847     GetStatusBubble()->UpdateDownloadShelfVisibility(visible);
 848 }
 849
 850 ///////////////////////////////////////////////////////////////////////////////
 851
 852 void Browser::UpdateUIForNavigationInTab(WebContents* contents,
 853                                          content::PageTransition transition,
 854                                          bool user_initiated) {
 855   tab_strip_model_->TabNavigating(contents, transition);
 856
 857   bool contents_is_selected =
 858       contents == tab_strip_model_->GetActiveWebContents();
 859   if (user_initiated && contents_is_selected && window()->GetLocationBar()) {
 860     // Forcibly reset the location bar if the url is going to change in the
 861     // current tab, since otherwise it won't discard any ongoing user edits,
 862     // since it doesn't realize this is a user-initiated action.
 863     window()->GetLocationBar()->Revert();
 864   }
 865
 866   if (GetStatusBubble())
 867     GetStatusBubble()->Hide();
 868
 869   // Update the location bar. This is synchronous. We specifically don't
 870   // update the load state since the load hasn't started yet and updating it
 871   // will put it out of sync with the actual state like whether we're
 872   // displaying a favicon, which controls the throbber. If we updated it here,
 873   // the throbber will show the default favicon for a split second when
 874   // navigating away from the new tab page.
 875   ScheduleUIUpdate(contents, content::INVALIDATE_TYPE_URL);
 876
 877   if (contents_is_selected)
 878     contents->GetView()->SetInitialFocus();
 879 }
 880
 881 ///////////////////////////////////////////////////////////////////////////////
 882 // Browser, PageNavigator implementation:
 883
 884 WebContents* Browser::OpenURL(const OpenURLParams& params) {
 885   return OpenURLFromTab(NULL, params);
 886 }
 887
 888 ///////////////////////////////////////////////////////////////////////////////
 889 // Browser, TabStripModelObserver implementation:
 890
 891 void Browser::TabInsertedAt(WebContents* contents,
 892                             int index,
 893                             bool foreground) {
 894   SetAsDelegate(contents, this);
 895   SessionTabHelper* session_tab_helper =
 896       SessionTabHelper::FromWebContents(contents);
 897   session_tab_helper->SetWindowID(session_id());
 898
 899   content::NotificationService::current()->Notify(
 900       chrome::NOTIFICATION_TAB_PARENTED,
 901       content::Source<content::WebContents>(contents),
 902       content::NotificationService::NoDetails());
 903
 904   SyncHistoryWithTabs(index);
 905
 906   // Make sure the loading state is updated correctly, otherwise the throbber
 907   // won't start if the page is loading.
 908   LoadingStateChanged(contents);
 909
 910   interstitial_observers_.push_back(new InterstitialObserver(this, contents));
 911
 912   SessionService* session_service =
 913       SessionServiceFactory::GetForProfile(profile_);
 914   if (session_service) {
 915     session_service->TabInserted(contents);
 916     int new_active_index = tab_strip_model_->active_index();
 917     if (index < new_active_index)
 918       session_service->SetSelectedTabInWindow(session_id(),
 919                                               new_active_index);
 920   }
 921 }
 922
 923 void Browser::TabClosingAt(TabStripModel* tab_strip_model,
 924                            WebContents* contents,
 925                            int index) {
 926   fullscreen_controller_->OnTabClosing(contents);
 927   SessionService* session_service =
 928       SessionServiceFactory::GetForProfile(profile_);
 929   if (session_service)
 930     session_service->TabClosing(contents);
 931   content::NotificationService::current()->Notify(
 932       chrome::NOTIFICATION_TAB_CLOSING,
 933       content::Source<NavigationController>(&contents->GetController()),
 934       content::NotificationService::NoDetails());
 935
 936   // Sever the WebContents' connection back to us.
 937   SetAsDelegate(contents, NULL);
 938 }
 939
 940 void Browser::TabDetachedAt(WebContents* contents, int index) {
 941   // TabDetachedAt is called before TabStripModel has updated the
 942   // active index.
 943   int old_active_index = tab_strip_model_->active_index();
 944   if (index < old_active_index && !tab_strip_model_->closing_all()) {
 945     SessionService* session_service =
 946         SessionServiceFactory::GetForProfileIfExisting(profile_);
 947     if (session_service)
 948       session_service->SetSelectedTabInWindow(session_id(),
 949                                               old_active_index - 1);
 950   }
 951   TabDetachedAtImpl(contents, index, DETACH_TYPE_DETACH);
 952 }
 953
 954 void Browser::TabDeactivated(WebContents* contents) {
 955   fullscreen_controller_->OnTabDeactivated(contents);
 956   search_delegate_->OnTabDeactivated(contents);
 957   SearchTabHelper::FromWebContents(contents)->OnTabDeactivated();
 958
 959   // Save what the user's currently typing, so it can be restored when we
 960   // switch back to this tab.
 961   window_->GetLocationBar()->SaveStateToContents(contents);
 962
 963   if (instant_controller_)
 964     instant_controller_->TabDeactivated(contents);
 965 }
 966
 967 void Browser::ActiveTabChanged(WebContents* old_contents,
 968                                WebContents* new_contents,
 969                                int index,
 970                                int reason) {
 971   content::RecordAction(UserMetricsAction("ActiveTabChanged"));
 972
 973   // Update the bookmark state, since the BrowserWindow may query it during
 974   // OnActiveTabChanged() below.
 975   UpdateBookmarkBarState(BOOKMARK_BAR_STATE_CHANGE_TAB_SWITCH);
 976
 977   // Let the BrowserWindow do its handling.  On e.g. views this changes the
 978   // focused object, which should happen before we update the toolbar below,
 979   // since the omnibox expects the correct element to already be focused when it
 980   // is updated.
 981   window_->OnActiveTabChanged(old_contents, new_contents, index, reason);
 982
 983   // Discarded tabs always get reloaded.
 984   if (tab_strip_model_->IsTabDiscarded(index)) {
 985     LOG(WARNING) << "Reloading discarded tab at " << index;
 986     static int reload_count = 0;
 987     UMA_HISTOGRAM_CUSTOM_COUNTS(
 988         "Tabs.Discard.ReloadCount", ++reload_count, 1, 1000, 50);
 989     chrome::Reload(this, CURRENT_TAB);
 990   }
 991
 992   // If we have any update pending, do it now.
 993   if (chrome_updater_factory_.HasWeakPtrs() && old_contents)
 994     ProcessPendingUIUpdates();
 995
 996   // Propagate the profile to the location bar.
 997   UpdateToolbar((reason & CHANGE_REASON_REPLACED) == 0);
 998
 999   if (chrome::IsInstantExtendedAPIEnabled())
1000     search_delegate_->OnTabActivated(new_contents);
1001
1002   // Update reload/stop state.
1003   command_controller_->LoadingStateChanged(new_contents->IsLoading(), true);
1004
1005   // Update commands to reflect current state.
1006   command_controller_->TabStateChanged();
1007
1008   // Reset the status bubble.
1009   StatusBubble* status_bubble = GetStatusBubble();
1010   if (status_bubble) {
1011     status_bubble->Hide();
1012
1013     // Show the loading state (if any).
1014     status_bubble->SetStatus(CoreTabHelper::FromWebContents(
1015         tab_strip_model_->GetActiveWebContents())->GetStatusText());
1016   }
1017
1018   if (HasFindBarController()) {
1019     find_bar_controller_->ChangeWebContents(new_contents);
1020     find_bar_controller_->find_bar()->MoveWindowIfNecessary(gfx::Rect(), true);
1021   }
1022
1023   // Update sessions. Don't force creation of sessions. If sessions doesn't
1024   // exist, the change will be picked up by sessions when created.
1025   SessionService* session_service =
1026       SessionServiceFactory::GetForProfileIfExisting(profile_);
1027   if (session_service && !tab_strip_model_->closing_all()) {
1028     session_service->SetSelectedTabInWindow(session_id(),
1029                                             tab_strip_model_->active_index());
1030   }
1031
1032   // This needs to be called after notifying SearchDelegate.
1033   if (instant_controller_)
1034     instant_controller_->ActiveTabChanged();
1035
1036   autofill::TabAutofillManagerDelegate::FromWebContents(new_contents)->
1037       TabActivated();
1038   SearchTabHelper::FromWebContents(new_contents)->OnTabActivated();
1039 }
1040
1041 void Browser::TabMoved(WebContents* contents,
1042                        int from_index,
1043                        int to_index) {
1044   DCHECK(from_index >= 0 && to_index >= 0);
1045   // Notify the history service.
1046   SyncHistoryWithTabs(std::min(from_index, to_index));
1047 }
1048
1049 void Browser::TabReplacedAt(TabStripModel* tab_strip_model,
1050                             WebContents* old_contents,
1051                             WebContents* new_contents,
1052                             int index) {
1053   TabDetachedAtImpl(old_contents, index, DETACH_TYPE_REPLACE);
1054   fullscreen_controller_->OnTabClosing(old_contents);
1055   SessionService* session_service =
1056       SessionServiceFactory::GetForProfile(profile_);
1057   if (session_service)
1058     session_service->TabClosing(old_contents);
1059   TabInsertedAt(new_contents,
1060                 index,
1061                 (index == tab_strip_model_->active_index()));
1062
1063   int entry_count = new_contents->GetController().GetEntryCount();
1064   if (entry_count > 0) {
1065     // Send out notification so that observers are updated appropriately.
1066     new_contents->GetController().NotifyEntryChanged(
1067         new_contents->GetController().GetEntryAtIndex(entry_count - 1),
1068         entry_count - 1);
1069   }
1070
1071   if (session_service) {
1072     // The new_contents may end up with a different navigation stack. Force
1073     // the session service to update itself.
1074     session_service->TabRestored(new_contents,
1075                                  tab_strip_model_->IsTabPinned(index));
1076   }
1077 }
1078
1079 void Browser::TabPinnedStateChanged(WebContents* contents, int index) {
1080   SessionService* session_service =
1081       SessionServiceFactory::GetForProfileIfExisting(profile());
1082   if (session_service) {
1083     SessionTabHelper* session_tab_helper =
1084         SessionTabHelper::FromWebContents(contents);
1085     session_service->SetPinnedState(session_id(),
1086                                     session_tab_helper->session_id(),
1087                                     tab_strip_model_->IsTabPinned(index));
1088   }
1089 }
1090
1091 void Browser::TabStripEmpty() {
1092   // Close the frame after we return to the message loop (not immediately,
1093   // otherwise it will destroy this object before the stack has a chance to
1094   // cleanly unwind.)
1095   // Note: This will be called several times if TabStripEmpty is called several
1096   //       times. This is because it does not close the window if tabs are
1097   //       still present.
1098   base::MessageLoop::current()->PostTask(
1099       FROM_HERE, base::Bind(&Browser::CloseFrame, weak_factory_.GetWeakPtr()));
1100
1101   // Instant may have visible WebContents that need to be detached before the
1102   // window system closes.
1103   instant_controller_.reset();
1104 }
1105
1106 bool Browser::CanOverscrollContent() const {
1107 #if defined(USE_AURA)
1108   bool overscroll_enabled = CommandLine::ForCurrentProcess()->
1109       GetSwitchValueASCII(switches::kOverscrollHistoryNavigation) != "0";
1110   if (!overscroll_enabled)
1111     return false;
1112   if (is_app() || is_devtools() || !is_type_tabbed())
1113     return false;
1114
1115   // The detached bookmark bar has appearance of floating above the
1116   // web-contents. This does not play nicely with overscroll navigation
1117   // gestures. So disable overscroll navigation when the bookmark bar is in the
1118   // detached state.
1119   if (bookmark_bar_state_ == BookmarkBar::DETACHED)
1120     return false;
1121   return true;
1122 #else
1123   return false;
1124 #endif
1125 }
1126
1127 bool Browser::PreHandleKeyboardEvent(content::WebContents* source,
1128                                      const NativeWebKeyboardEvent& event,
1129                                      bool* is_keyboard_shortcut) {
1130   // Escape exits tabbed fullscreen mode.
1131   // TODO(koz): Write a test for this http://crbug.com/100441.
1132   if (event.windowsKeyCode == 27 &&
1133       fullscreen_controller_->HandleUserPressedEscape()) {
1134     return true;
1135   }
1136   return window()->PreHandleKeyboardEvent(event, is_keyboard_shortcut);
1137 }
1138
1139 void Browser::HandleKeyboardEvent(content::WebContents* source,
1140                                   const NativeWebKeyboardEvent& event) {
1141   window()->HandleKeyboardEvent(event);
1142 }
1143
1144 bool Browser::TabsNeedBeforeUnloadFired() {
1145   if (IsFastTabUnloadEnabled())
1146     return fast_unload_controller_->TabsNeedBeforeUnloadFired();
1147   return unload_controller_->TabsNeedBeforeUnloadFired();
1148 }
1149
1150 void Browser::OverscrollUpdate(int delta_y) {
1151   window_->OverscrollUpdate(delta_y);
1152 }
1153
1154 void Browser::ShowValidationMessage(content::WebContents* web_contents,
1155                                     const gfx::Rect& anchor_in_root_view,
1156                                     const base::string16& main_text,
1157                                     const base::string16& sub_text) {
1158   RenderWidgetHostView* rwhv = web_contents->GetRenderWidgetHostView();
1159   if (rwhv) {
1160     validation_message_bubble_ =
1161         chrome::ValidationMessageBubble::CreateAndShow(
1162             rwhv->GetRenderWidgetHost(),
1163             anchor_in_root_view,
1164             main_text,
1165             sub_text);
1166   }
1167 }
1168
1169 void Browser::HideValidationMessage(content::WebContents* web_contents) {
1170   validation_message_bubble_.reset();
1171 }
1172
1173 void Browser::MoveValidationMessage(content::WebContents* web_contents,
1174                                     const gfx::Rect& anchor_in_root_view) {
1175   if (!validation_message_bubble_)
1176     return;
1177   RenderWidgetHostView* rwhv = web_contents->GetRenderWidgetHostView();
1178   if (rwhv) {
1179     validation_message_bubble_->SetPositionRelativeToAnchor(
1180         rwhv->GetRenderWidgetHost(), anchor_in_root_view);
1181   }
1182 }
1183
1184 bool Browser::IsMouseLocked() const {
1185   return fullscreen_controller_->IsMouseLocked();
1186 }
1187
1188 void Browser::OnWindowDidShow() {
1189   if (window_has_shown_)
1190     return;
1191   window_has_shown_ = true;
1192
1193 // CurrentProcessInfo::CreationTime() is missing on some platforms.
1194 #if defined(OS_MACOSX) || defined(OS_WIN) || defined(OS_LINUX)
1195   // Measure the latency from startup till the first browser window becomes
1196   // visible.
1197   static bool is_first_browser_window = true;
1198   if (is_first_browser_window &&
1199       !startup_metric_utils::WasNonBrowserUIDisplayed()) {
1200     is_first_browser_window = false;
1201     const base::Time process_creation_time =
1202         base::CurrentProcessInfo::CreationTime();
1203
1204     if (!process_creation_time.is_null()) {
1205       UMA_HISTOGRAM_LONG_TIMES(
1206           "Startup.BrowserWindowDisplay",
1207           base::Time::Now() - process_creation_time);
1208     }
1209   }
1210 #endif  // defined(OS_MACOSX) || defined(OS_WIN) || defined(OS_LINUX)
1211
1212   // Nothing to do for non-tabbed windows.
1213   if (!is_type_tabbed())
1214     return;
1215
1216   // Show any pending global error bubble.
1217   GlobalErrorService* service =
1218       GlobalErrorServiceFactory::GetForProfile(profile());
1219   GlobalError* error = service->GetFirstGlobalErrorWithBubbleView();
1220   if (error)
1221     error->ShowBubbleView(this);
1222 }
1223
1224 void Browser::ShowFirstRunBubble() {
1225   window()->GetLocationBar()->ShowFirstRunBubble();
1226 }
1227
1228 void Browser::ShowDownload(content::DownloadItem* download) {
1229   if (!window())
1230     return;
1231
1232   // If the download occurs in a new tab, and it's not a save page
1233   // download (started before initial navigation completed) close it.
1234   WebContents* source = download->GetWebContents();
1235   if (source && source->GetController().IsInitialNavigation() &&
1236       tab_strip_model_->count() > 1 && !download->IsSavePackageDownload()) {
1237     CloseContents(source);
1238   }
1239
1240   // Some (app downloads) are not supposed to appear on the shelf.
1241   if (!DownloadItemModel(download).ShouldShowInShelf())
1242     return;
1243
1244   // GetDownloadShelf creates the download shelf if it was not yet created.
1245   DownloadShelf* shelf = window()->GetDownloadShelf();
1246   shelf->AddDownload(download);
1247 }
1248
1249 ///////////////////////////////////////////////////////////////////////////////
1250 // Browser, content::WebContentsDelegate implementation:
1251
1252 WebContents* Browser::OpenURLFromTab(WebContents* source,
1253                                      const OpenURLParams& params) {
1254   chrome::NavigateParams nav_params(this, params.url, params.transition);
1255   FillNavigateParamsFromOpenURLParams(&nav_params, params);
1256   nav_params.source_contents = source;
1257   nav_params.tabstrip_add_types = TabStripModel::ADD_NONE;
1258   nav_params.window_action = chrome::NavigateParams::SHOW_WINDOW;
1259   nav_params.user_gesture = params.user_gesture;
1260
1261   PopupBlockerTabHelper* popup_blocker_helper = NULL;
1262   if (source)
1263     popup_blocker_helper = PopupBlockerTabHelper::FromWebContents(source);
1264
1265   if (popup_blocker_helper) {
1266     if ((params.disposition == NEW_POPUP ||
1267          params.disposition == NEW_FOREGROUND_TAB ||
1268          params.disposition == NEW_BACKGROUND_TAB ||
1269          params.disposition == NEW_WINDOW) &&
1270         !params.user_gesture && !CommandLine::ForCurrentProcess()->HasSwitch(
1271                                     switches::kDisablePopupBlocking)) {
1272       if (popup_blocker_helper->MaybeBlockPopup(nav_params,
1273                                                 WebWindowFeatures())) {
1274         return NULL;
1275       }
1276     }
1277   }
1278
1279   chrome::Navigate(&nav_params);
1280
1281   return nav_params.target_contents;
1282 }
1283
1284 void Browser::NavigationStateChanged(const WebContents* source,
1285                                      unsigned changed_flags) {
1286   // Only update the UI when something visible has changed.
1287   if (changed_flags)
1288     ScheduleUIUpdate(source, changed_flags);
1289
1290   // We can synchronously update commands since they will only change once per
1291   // navigation, so we don't have to worry about flickering. We do, however,
1292   // need to update the command state early on load to always present usable
1293   // actions in the face of slow-to-commit pages.
1294   if (changed_flags & (content::INVALIDATE_TYPE_URL |
1295                        content::INVALIDATE_TYPE_LOAD))
1296     command_controller_->TabStateChanged();
1297 }
1298
1299 void Browser::AddNewContents(WebContents* source,
1300                              WebContents* new_contents,
1301                              WindowOpenDisposition disposition,
1302                              const gfx::Rect& initial_pos,
1303                              bool user_gesture,
1304                              bool* was_blocked) {
1305   chrome::AddWebContents(this, source, new_contents, disposition, initial_pos,
1306                          user_gesture, was_blocked);
1307 }
1308
1309 void Browser::ActivateContents(WebContents* contents) {
1310   tab_strip_model_->ActivateTabAt(
1311       tab_strip_model_->GetIndexOfWebContents(contents), false);
1312   window_->Activate();
1313 }
1314
1315 void Browser::DeactivateContents(WebContents* contents) {
1316   window_->Deactivate();
1317 }
1318
1319 void Browser::LoadingStateChanged(WebContents* source) {
1320   window_->UpdateLoadingAnimations(tab_strip_model_->TabsAreLoading());
1321   window_->UpdateTitleBar();
1322
1323   WebContents* selected_contents = tab_strip_model_->GetActiveWebContents();
1324   if (source == selected_contents) {
1325     bool is_loading = source->IsLoading();
1326     command_controller_->LoadingStateChanged(is_loading, false);
1327     if (GetStatusBubble()) {
1328       GetStatusBubble()->SetStatus(CoreTabHelper::FromWebContents(
1329           tab_strip_model_->GetActiveWebContents())->GetStatusText());
1330     }
1331   }
1332 }
1333
1334 void Browser::CloseContents(WebContents* source) {
1335   bool can_close_contents;
1336   if (IsFastTabUnloadEnabled())
1337     can_close_contents = fast_unload_controller_->CanCloseContents(source);
1338   else
1339     can_close_contents = unload_controller_->CanCloseContents(source);
1340
1341   if (can_close_contents)
1342     chrome::CloseWebContents(this, source, true);
1343 }
1344
1345 void Browser::MoveContents(WebContents* source, const gfx::Rect& pos) {
1346   if (!IsPopupOrPanel(source)) {
1347     NOTREACHED() << "moving invalid browser type";
1348     return;
1349   }
1350   window_->SetBounds(pos);
1351 }
1352
1353 bool Browser::IsPopupOrPanel(const WebContents* source) const {
1354   return is_type_popup();
1355 }
1356
1357 void Browser::UpdateTargetURL(WebContents* source, int32 page_id,
1358                               const GURL& url) {
1359   if (!GetStatusBubble())
1360     return;
1361
1362   if (source == tab_strip_model_->GetActiveWebContents()) {
1363     PrefService* prefs = profile_->GetPrefs();
1364     GetStatusBubble()->SetURL(url, prefs->GetString(prefs::kAcceptLanguages));
1365   }
1366 }
1367
1368 void Browser::ContentsMouseEvent(
1369     WebContents* source, const gfx::Point& location, bool motion) {
1370   if (!GetStatusBubble())
1371     return;
1372
1373   if (source == tab_strip_model_->GetActiveWebContents()) {
1374     GetStatusBubble()->MouseMoved(location, !motion);
1375     if (!motion)
1376       GetStatusBubble()->SetURL(GURL(), std::string());
1377   }
1378 }
1379
1380 void Browser::ContentsZoomChange(bool zoom_in) {
1381   chrome::ExecuteCommand(this, zoom_in ? IDC_ZOOM_PLUS : IDC_ZOOM_MINUS);
1382 }
1383
1384 void Browser::WebContentsFocused(WebContents* contents) {
1385   window_->WebContentsFocused(contents);
1386 }
1387
1388 bool Browser::TakeFocus(content::WebContents* source,
1389                         bool reverse) {
1390   content::NotificationService::current()->Notify(
1391       chrome::NOTIFICATION_FOCUS_RETURNED_TO_BROWSER,
1392       content::Source<Browser>(this),
1393       content::NotificationService::NoDetails());
1394   return false;
1395 }
1396
1397 gfx::Rect Browser::GetRootWindowResizerRect() const {
1398   return window_->GetRootWindowResizerRect();
1399 }
1400
1401 void Browser::BeforeUnloadFired(WebContents* web_contents,
1402                                 bool proceed,
1403                                 bool* proceed_to_fire_unload) {
1404   if (is_devtools() && DevToolsWindow::HandleBeforeUnload(web_contents,
1405         proceed, proceed_to_fire_unload))
1406     return;
1407
1408   if (IsFastTabUnloadEnabled()) {
1409     *proceed_to_fire_unload =
1410         fast_unload_controller_->BeforeUnloadFired(web_contents, proceed);
1411   } else {
1412     *proceed_to_fire_unload =
1413         unload_controller_->BeforeUnloadFired(web_contents, proceed);
1414   }
1415 }
1416
1417 bool Browser::ShouldFocusLocationBarByDefault(WebContents* source) {
1418   const content::NavigationEntry* entry =
1419       source->GetController().GetActiveEntry();
1420   if (entry) {
1421     GURL url = entry->GetURL();
1422     GURL virtual_url = entry->GetVirtualURL();
1423     if ((url.SchemeIs(chrome::kChromeUIScheme) &&
1424         url.host() == chrome::kChromeUINewTabHost) ||
1425         (virtual_url.SchemeIs(chrome::kChromeUIScheme) &&
1426         virtual_url.host() == chrome::kChromeUINewTabHost)) {
1427       return true;
1428     }
1429   }
1430
1431   return chrome::NavEntryIsInstantNTP(source, entry);
1432 }
1433
1434 void Browser::SetFocusToLocationBar(bool select_all) {
1435   // Two differences between this and FocusLocationBar():
1436   // (1) This doesn't get recorded in user metrics, since it's called
1437   //     internally.
1438   // (2) This checks whether the location bar can be focused, and if not, clears
1439   //     the focus.  FocusLocationBar() is only reached when the location bar is
1440   //     focusable, but this may be reached at other times, e.g. while in
1441   //     fullscreen mode, where we need to leave focus in a consistent state.
1442   window_->SetFocusToLocationBar(select_all);
1443 }
1444
1445 int Browser::GetExtraRenderViewHeight() const {
1446   return window_->GetExtraRenderViewHeight();
1447 }
1448
1449 void Browser::ViewSourceForTab(WebContents* source, const GURL& page_url) {
1450   DCHECK(source);
1451   chrome::ViewSource(this, source);
1452 }
1453
1454 void Browser::ViewSourceForFrame(WebContents* source,
1455                                  const GURL& frame_url,
1456                                  const content::PageState& frame_page_state) {
1457   DCHECK(source);
1458   chrome::ViewSource(this, source, frame_url, frame_page_state);
1459 }
1460
1461 void Browser::ShowRepostFormWarningDialog(WebContents* source) {
1462   TabModalConfirmDialog::Create(new RepostFormWarningController(source),
1463                                 source);
1464 }
1465
1466 bool Browser::ShouldCreateWebContents(
1467     WebContents* web_contents,
1468     int route_id,
1469     WindowContainerType window_container_type,
1470     const base::string16& frame_name,
1471     const GURL& target_url,
1472     const std::string& partition_id,
1473     content::SessionStorageNamespace* session_storage_namespace) {
1474   if (window_container_type == WINDOW_CONTAINER_TYPE_BACKGROUND) {
1475     // If a BackgroundContents is created, suppress the normal WebContents.
1476     return !MaybeCreateBackgroundContents(route_id,
1477                                           web_contents,
1478                                           frame_name,
1479                                           target_url,
1480                                           partition_id,
1481                                           session_storage_namespace);
1482   }
1483
1484   return true;
1485 }
1486
1487 void Browser::WebContentsCreated(WebContents* source_contents,
1488                                  int64 source_frame_id,
1489                                  const base::string16& frame_name,
1490                                  const GURL& target_url,
1491                                  WebContents* new_contents) {
1492   // Adopt the WebContents now, so all observers are in place, as the network
1493   // requests for its initial navigation will start immediately. The WebContents
1494   // will later be inserted into this browser using Browser::Navigate via
1495   // AddNewContents.
1496   BrowserTabContents::AttachTabHelpers(new_contents);
1497
1498   // Notify.
1499   RetargetingDetails details;
1500   details.source_web_contents = source_contents;
1501   details.source_frame_id = source_frame_id;
1502   details.target_url = target_url;
1503   details.target_web_contents = new_contents;
1504   details.not_yet_in_tabstrip = true;
1505   content::NotificationService::current()->Notify(
1506       chrome::NOTIFICATION_RETARGETING,
1507       content::Source<Profile>(profile_),
1508       content::Details<RetargetingDetails>(&details));
1509 }
1510
1511 void Browser::RendererUnresponsive(WebContents* source) {
1512   // Ignore hangs if a tab is blocked.
1513   int index = tab_strip_model_->GetIndexOfWebContents(source);
1514   DCHECK_NE(TabStripModel::kNoTab, index);
1515   if (tab_strip_model_->IsTabBlocked(index))
1516     return;
1517
1518   chrome::ShowHungRendererDialog(source);
1519 }
1520
1521 void Browser::RendererResponsive(WebContents* source) {
1522   chrome::HideHungRendererDialog(source);
1523 }
1524
1525 void Browser::WorkerCrashed(WebContents* source) {
1526   SimpleAlertInfoBarDelegate::Create(
1527       InfoBarService::FromWebContents(source), InfoBarDelegate::kNoIconID,
1528       l10n_util::GetStringUTF16(IDS_WEBWORKER_CRASHED_PROMPT), true);
1529 }
1530
1531 void Browser::DidNavigateMainFramePostCommit(WebContents* web_contents) {
1532   if (web_contents == tab_strip_model_->GetActiveWebContents())
1533     UpdateBookmarkBarState(BOOKMARK_BAR_STATE_CHANGE_TAB_STATE);
1534 }
1535
1536 void Browser::DidNavigateToPendingEntry(WebContents* web_contents) {
1537   if (web_contents == tab_strip_model_->GetActiveWebContents())
1538     UpdateBookmarkBarState(BOOKMARK_BAR_STATE_CHANGE_TAB_STATE);
1539 }
1540
1541 content::JavaScriptDialogManager* Browser::GetJavaScriptDialogManager() {
1542   return GetJavaScriptDialogManagerInstance();
1543 }
1544
1545 content::ColorChooser* Browser::OpenColorChooser(
1546       WebContents* web_contents,
1547       SkColor initial_color,
1548       const std::vector<content::ColorSuggestion>& suggestions) {
1549   return chrome::ShowColorChooser(web_contents, initial_color);
1550 }
1551
1552 void Browser::RunFileChooser(WebContents* web_contents,
1553                              const content::FileChooserParams& params) {
1554   FileSelectHelper::RunFileChooser(web_contents, params);
1555 }
1556
1557 void Browser::EnumerateDirectory(WebContents* web_contents,
1558                                  int request_id,
1559                                  const base::FilePath& path) {
1560   FileSelectHelper::EnumerateDirectory(web_contents, request_id, path);
1561 }
1562
1563 bool Browser::EmbedsFullscreenWidget() const {
1564   return CommandLine::ForCurrentProcess()->
1565       HasSwitch(switches::kEmbedFlashFullscreen);
1566 }
1567
1568 void Browser::ToggleFullscreenModeForTab(WebContents* web_contents,
1569                                          bool enter_fullscreen) {
1570   fullscreen_controller_->ToggleFullscreenModeForTab(web_contents,
1571                                                      enter_fullscreen);
1572 }
1573
1574 bool Browser::IsFullscreenForTabOrPending(
1575     const WebContents* web_contents) const {
1576   return fullscreen_controller_->IsFullscreenForTabOrPending(web_contents);
1577 }
1578
1579 void Browser::JSOutOfMemory(WebContents* web_contents) {
1580   InfoBarService* infobar_service =
1581       InfoBarService::FromWebContents(web_contents);
1582   if (!infobar_service)
1583     return;
1584   SimpleAlertInfoBarDelegate::Create(
1585       infobar_service, InfoBarDelegate::kNoIconID,
1586       l10n_util::GetStringUTF16(IDS_JS_OUT_OF_MEMORY_PROMPT), true);
1587 }
1588
1589 void Browser::RegisterProtocolHandler(WebContents* web_contents,
1590                                       const std::string& protocol,
1591                                       const GURL& url,
1592                                       const base::string16& title,
1593                                       bool user_gesture) {
1594   Profile* profile =
1595       Profile::FromBrowserContext(web_contents->GetBrowserContext());
1596   if (profile->IsOffTheRecord())
1597     return;
1598
1599   ProtocolHandler handler =
1600       ProtocolHandler::CreateProtocolHandler(protocol, url, title);
1601
1602   ProtocolHandlerRegistry* registry =
1603       ProtocolHandlerRegistryFactory::GetForProfile(profile);
1604   if (registry->SilentlyHandleRegisterHandlerRequest(handler))
1605     return;
1606
1607   TabSpecificContentSettings* tab_content_settings =
1608       TabSpecificContentSettings::FromWebContents(web_contents);
1609   if (!user_gesture && window_) {
1610     tab_content_settings->set_pending_protocol_handler(handler);
1611     tab_content_settings->set_previous_protocol_handler(
1612         registry->GetHandlerFor(handler.protocol()));
1613     window_->GetLocationBar()->UpdateContentSettingsIcons();
1614     return;
1615   }
1616
1617   // Make sure content-setting icon is turned off in case the page does
1618   // ungestured and gestured RPH calls.
1619   if (window_) {
1620     tab_content_settings->ClearPendingProtocolHandler();
1621     window_->GetLocationBar()->UpdateContentSettingsIcons();
1622   }
1623
1624   RegisterProtocolHandlerInfoBarDelegate::Create(
1625       InfoBarService::FromWebContents(web_contents), registry, handler);
1626 }
1627
1628 void Browser::UpdatePreferredSize(WebContents* source,
1629                                   const gfx::Size& pref_size) {
1630   window_->UpdatePreferredSize(source, pref_size);
1631 }
1632
1633 void Browser::ResizeDueToAutoResize(WebContents* source,
1634                                     const gfx::Size& new_size) {
1635   window_->ResizeDueToAutoResize(source, new_size);
1636 }
1637
1638 void Browser::FindReply(WebContents* web_contents,
1639                         int request_id,
1640                         int number_of_matches,
1641                         const gfx::Rect& selection_rect,
1642                         int active_match_ordinal,
1643                         bool final_update) {
1644   FindTabHelper* find_tab_helper = FindTabHelper::FromWebContents(web_contents);
1645   if (!find_tab_helper)
1646     return;
1647
1648   find_tab_helper->HandleFindReply(request_id,
1649                                    number_of_matches,
1650                                    selection_rect,
1651                                    active_match_ordinal,
1652                                    final_update);
1653 }
1654
1655 void Browser::RequestToLockMouse(WebContents* web_contents,
1656                                  bool user_gesture,
1657                                  bool last_unlocked_by_target) {
1658   fullscreen_controller_->RequestToLockMouse(web_contents,
1659                                              user_gesture,
1660                                              last_unlocked_by_target);
1661 }
1662
1663 void Browser::LostMouseLock() {
1664   fullscreen_controller_->LostMouseLock();
1665 }
1666
1667 void Browser::RequestMediaAccessPermission(
1668     content::WebContents* web_contents,
1669     const content::MediaStreamRequest& request,
1670     const content::MediaResponseCallback& callback) {
1671   ::RequestMediaAccessPermission(web_contents, profile_, request, callback);
1672 }
1673
1674 bool Browser::RequestPpapiBrokerPermission(
1675     WebContents* web_contents,
1676     const GURL& url,
1677     const base::FilePath& plugin_path,
1678     const base::Callback<void(bool)>& callback) {
1679   PepperBrokerInfoBarDelegate::Create(web_contents, url, plugin_path, callback);
1680   return true;
1681 }
1682
1683 gfx::Size Browser::GetSizeForNewRenderView(
1684     const WebContents* web_contents) const {
1685   // When navigating away from NTP with unpinned bookmark bar, the bookmark bar
1686   // would disappear on non-NTP pages, resulting in a bigger size for the new
1687   // render view.
1688   gfx::Size size = web_contents->GetView()->GetContainerSize();
1689   // Don't change render view size if bookmark bar is currently not detached,
1690   // or there's no pending entry, or navigating to a NTP page.
1691   if (size.IsEmpty() || bookmark_bar_state_ != BookmarkBar::DETACHED)
1692     return size;
1693   const NavigationEntry* pending_entry =
1694       web_contents->GetController().GetPendingEntry();
1695   if (pending_entry &&
1696       !chrome::IsNTPURL(pending_entry->GetVirtualURL(), profile_)) {
1697     size.Enlarge(
1698         0, window()->GetRenderViewHeightInsetWithDetachedBookmarkBar());
1699   }
1700   return size;
1701 }
1702
1703 ///////////////////////////////////////////////////////////////////////////////
1704 // Browser, CoreTabHelperDelegate implementation:
1705
1706 void Browser::SwapTabContents(content::WebContents* old_contents,
1707                               content::WebContents* new_contents) {
1708   int index = tab_strip_model_->GetIndexOfWebContents(old_contents);
1709   DCHECK_NE(TabStripModel::kNoTab, index);
1710   tab_strip_model_->ReplaceWebContentsAt(index, new_contents);
1711 }
1712
1713 bool Browser::CanReloadContents(content::WebContents* web_contents) const {
1714   return chrome::CanReload(this);
1715 }
1716
1717 bool Browser::CanSaveContents(content::WebContents* web_contents) const {
1718   return chrome::CanSavePage(this);
1719 }
1720
1721 ///////////////////////////////////////////////////////////////////////////////
1722 // Browser, SearchEngineTabHelperDelegate implementation:
1723
1724 void Browser::ConfirmAddSearchProvider(TemplateURL* template_url,
1725                                        Profile* profile) {
1726   window()->ConfirmAddSearchProvider(template_url, profile);
1727 }
1728
1729 ///////////////////////////////////////////////////////////////////////////////
1730 // Browser, web_modal::WebContentsModalDialogManagerDelegate implementation:
1731
1732 void Browser::SetWebContentsBlocked(content::WebContents* web_contents,
1733                                     bool blocked) {
1734   int index = tab_strip_model_->GetIndexOfWebContents(web_contents);
1735   if (index == TabStripModel::kNoTab) {
1736     NOTREACHED();
1737     return;
1738   }
1739   tab_strip_model_->SetTabBlocked(index, blocked);
1740   if (!blocked && tab_strip_model_->GetActiveWebContents() == web_contents)
1741     web_contents->GetView()->Focus();
1742 }
1743
1744 web_modal::WebContentsModalDialogHost*
1745 Browser::GetWebContentsModalDialogHost() {
1746   return window_->GetWebContentsModalDialogHost();
1747 }
1748
1749 ///////////////////////////////////////////////////////////////////////////////
1750 // Browser, BookmarkTabHelperDelegate implementation:
1751
1752 void Browser::URLStarredChanged(content::WebContents* web_contents,
1753                                 bool starred) {
1754   if (web_contents == tab_strip_model_->GetActiveWebContents())
1755     window_->SetStarredState(starred);
1756 }
1757
1758 ///////////////////////////////////////////////////////////////////////////////
1759 // Browser, ZoomObserver implementation:
1760
1761 void Browser::OnZoomChanged(content::WebContents* source,
1762                             bool can_show_bubble) {
1763   if (source == tab_strip_model_->GetActiveWebContents()) {
1764     // Only show the zoom bubble for zoom changes in the active window.
1765     window_->ZoomChangedForActiveTab(can_show_bubble && window_->IsActive());
1766   }
1767 }
1768
1769 ///////////////////////////////////////////////////////////////////////////////
1770 // Browser, ui::SelectFileDialog::Listener implementation:
1771
1772 void Browser::FileSelected(const base::FilePath& path, int index,
1773                            void* params) {
1774   FileSelectedWithExtraInfo(ui::SelectedFileInfo(path, path), index, params);
1775 }
1776
1777 void Browser::FileSelectedWithExtraInfo(const ui::SelectedFileInfo& file_info,
1778                                         int index,
1779                                         void* params) {
1780   profile_->set_last_selected_directory(file_info.file_path.DirName());
1781
1782   GURL url = net::FilePathToFileURL(file_info.local_path);
1783
1784 #if defined(OS_CHROMEOS)
1785   drive::util::MaybeSetDriveURL(profile_, file_info.file_path, &url);
1786 #endif
1787
1788   if (url.is_empty())
1789     return;
1790
1791   OpenURL(OpenURLParams(
1792       url, Referrer(), CURRENT_TAB, content::PAGE_TRANSITION_TYPED, false));
1793 }
1794
1795 ///////////////////////////////////////////////////////////////////////////////
1796 // Browser, content::NotificationObserver implementation:
1797
1798 void Browser::Observe(int type,
1799                       const content::NotificationSource& source,
1800                       const content::NotificationDetails& details) {
1801   switch (type) {
1802     case chrome::NOTIFICATION_EXTENSION_UNLOADED: {
1803       if (window()->GetLocationBar())
1804         window()->GetLocationBar()->UpdatePageActions();
1805
1806       const extensions::UnloadedExtensionInfo* extension_info =
1807           content::Details<extensions::UnloadedExtensionInfo>(details).ptr();
1808
1809       // Close any tabs from the unloaded extension, unless it's terminated,
1810       // in which case let the sad tabs remain.
1811       if (extension_info->reason !=
1812           extensions::UnloadedExtensionInfo::REASON_TERMINATE) {
1813         const Extension* extension = extension_info->extension;
1814         // Iterate backwards as we may remove items while iterating.
1815         for (int i = tab_strip_model_->count() - 1; i >= 0; --i) {
1816           WebContents* web_contents = tab_strip_model_->GetWebContentsAt(i);
1817           // Two cases are handled here:
1818           // - The scheme check is for when an extension page is loaded in a
1819           //   tab, e.g. chrome-extension://id/page.html.
1820           // - The extension_app check is for apps, which can have non-extension
1821           //   schemes, e.g. https://mail.google.com if you have the Gmail app
1822           //   installed.
1823           if ((web_contents->GetURL().SchemeIs(extensions::kExtensionScheme) &&
1824                web_contents->GetURL().host() == extension->id()) ||
1825               (extensions::TabHelper::FromWebContents(
1826                    web_contents)->extension_app() == extension)) {
1827             tab_strip_model_->CloseWebContentsAt(i, TabStripModel::CLOSE_NONE);
1828           }
1829         }
1830       }
1831       break;
1832     }
1833
1834     case chrome::NOTIFICATION_EXTENSION_PROCESS_TERMINATED: {
1835       Profile* profile = content::Source<Profile>(source).ptr();
1836       if (profile_->IsSameProfile(profile) && window()->GetLocationBar())
1837         window()->GetLocationBar()->InvalidatePageActions();
1838       break;
1839     }
1840
1841     case chrome::NOTIFICATION_EXTENSION_UNINSTALLED:
1842     case chrome::NOTIFICATION_EXTENSION_LOADED:
1843       // During window creation on Windows we may end up calling into
1844       // SHAppBarMessage, which internally spawns a nested message loop. This
1845       // makes it possible for us to end up here before window creation has
1846       // completed, at which point window_ is NULL. See 94752 for details.
1847       if (window() && window()->GetLocationBar())
1848         window()->GetLocationBar()->UpdatePageActions();
1849       break;
1850
1851 #if defined(ENABLE_THEMES)
1852     case chrome::NOTIFICATION_BROWSER_THEME_CHANGED:
1853       window()->UserChangedTheme();
1854       break;
1855 #endif
1856
1857     case chrome::NOTIFICATION_WEB_CONTENT_SETTINGS_CHANGED: {
1858       WebContents* web_contents = content::Source<WebContents>(source).ptr();
1859       if (web_contents == tab_strip_model_->GetActiveWebContents()) {
1860         LocationBar* location_bar = window()->GetLocationBar();
1861         if (location_bar)
1862           location_bar->UpdateContentSettingsIcons();
1863       }
1864       break;
1865     }
1866
1867     default:
1868       NOTREACHED() << "Got a notification we didn't register for.";
1869   }
1870 }
1871
1872 ///////////////////////////////////////////////////////////////////////////////
1873 // Browser, Command and state updating (private):
1874
1875 void Browser::OnDevToolsDisabledChanged() {
1876   if (profile_->GetPrefs()->GetBoolean(prefs::kDevToolsDisabled))
1877     content::DevToolsManager::GetInstance()->CloseAllClientHosts();
1878 }
1879
1880 ///////////////////////////////////////////////////////////////////////////////
1881 // Browser, UI update coalescing and handling (private):
1882
1883 void Browser::UpdateToolbar(bool should_restore_state) {
1884   window_->UpdateToolbar(should_restore_state ?
1885       tab_strip_model_->GetActiveWebContents() : NULL);
1886 }
1887
1888 void Browser::ScheduleUIUpdate(const WebContents* source,
1889                                unsigned changed_flags) {
1890   DCHECK(source);
1891   if (DevToolsWindow::IsDevToolsWindow(source->GetRenderViewHost()))
1892     return;
1893
1894   int index = tab_strip_model_->GetIndexOfWebContents(source);
1895   DCHECK_NE(TabStripModel::kNoTab, index);
1896
1897   // Do some synchronous updates.
1898   if (changed_flags & content::INVALIDATE_TYPE_URL &&
1899       source == tab_strip_model_->GetActiveWebContents()) {
1900     // Only update the URL for the current tab. Note that we do not update
1901     // the navigation commands since those would have already been updated
1902     // synchronously by NavigationStateChanged.
1903     UpdateToolbar(false);
1904     changed_flags &= ~content::INVALIDATE_TYPE_URL;
1905   }
1906   if (changed_flags & content::INVALIDATE_TYPE_LOAD) {
1907     // Update the loading state synchronously. This is so the throbber will
1908     // immediately start/stop, which gives a more snappy feel. We want to do
1909     // this for any tab so they start & stop quickly.
1910     tab_strip_model_->UpdateWebContentsStateAt(
1911         tab_strip_model_->GetIndexOfWebContents(source),
1912         TabStripModelObserver::LOADING_ONLY);
1913     // The status bubble needs to be updated during INVALIDATE_TYPE_LOAD too,
1914     // but we do that asynchronously by not stripping INVALIDATE_TYPE_LOAD from
1915     // changed_flags.
1916   }
1917
1918   if (changed_flags & content::INVALIDATE_TYPE_TITLE && !source->IsLoading()) {
1919     // To correctly calculate whether the title changed while not loading
1920     // we need to process the update synchronously. This state only matters for
1921     // the TabStripModel, so we notify the TabStripModel now and notify others
1922     // asynchronously.
1923     tab_strip_model_->UpdateWebContentsStateAt(
1924         tab_strip_model_->GetIndexOfWebContents(source),
1925         TabStripModelObserver::TITLE_NOT_LOADING);
1926   }
1927
1928   // If the only updates were synchronously handled above, we're done.
1929   if (changed_flags == 0)
1930     return;
1931
1932   // Save the dirty bits.
1933   scheduled_updates_[source] |= changed_flags;
1934
1935   if (!chrome_updater_factory_.HasWeakPtrs()) {
1936     // No task currently scheduled, start another.
1937     base::MessageLoop::current()->PostDelayedTask(
1938         FROM_HERE,
1939         base::Bind(&Browser::ProcessPendingUIUpdates,
1940                    chrome_updater_factory_.GetWeakPtr()),
1941         base::TimeDelta::FromMilliseconds(kUIUpdateCoalescingTimeMS));
1942   }
1943 }
1944
1945 void Browser::ProcessPendingUIUpdates() {
1946 #ifndef NDEBUG
1947   // Validate that all tabs we have pending updates for exist. This is scary
1948   // because the pending list must be kept in sync with any detached or
1949   // deleted tabs.
1950   for (UpdateMap::const_iterator i = scheduled_updates_.begin();
1951        i != scheduled_updates_.end(); ++i) {
1952     bool found = false;
1953     for (int tab = 0; tab < tab_strip_model_->count(); tab++) {
1954       if (tab_strip_model_->GetWebContentsAt(tab) == i->first) {
1955         found = true;
1956         break;
1957       }
1958     }
1959     DCHECK(found);
1960   }
1961 #endif
1962
1963   chrome_updater_factory_.InvalidateWeakPtrs();
1964
1965   for (UpdateMap::const_iterator i = scheduled_updates_.begin();
1966        i != scheduled_updates_.end(); ++i) {
1967     // Do not dereference |contents|, it may be out-of-date!
1968     const WebContents* contents = i->first;
1969     unsigned flags = i->second;
1970
1971     if (contents == tab_strip_model_->GetActiveWebContents()) {
1972       // Updates that only matter when the tab is selected go here.
1973
1974       if (flags & content::INVALIDATE_TYPE_PAGE_ACTIONS) {
1975         LocationBar* location_bar = window()->GetLocationBar();
1976         if (location_bar)
1977           location_bar->UpdatePageActions();
1978       }
1979       // Updating the URL happens synchronously in ScheduleUIUpdate.
1980       if (flags & content::INVALIDATE_TYPE_LOAD && GetStatusBubble()) {
1981         GetStatusBubble()->SetStatus(CoreTabHelper::FromWebContents(
1982             tab_strip_model_->GetActiveWebContents())->GetStatusText());
1983       }
1984
1985       if (flags & (content::INVALIDATE_TYPE_TAB |
1986                    content::INVALIDATE_TYPE_TITLE)) {
1987         window_->UpdateTitleBar();
1988       }
1989     }
1990
1991     // Updates that don't depend upon the selected state go here.
1992     if (flags &
1993         (content::INVALIDATE_TYPE_TAB | content::INVALIDATE_TYPE_TITLE)) {
1994       tab_strip_model_->UpdateWebContentsStateAt(
1995           tab_strip_model_->GetIndexOfWebContents(contents),
1996           TabStripModelObserver::ALL);
1997     }
1998
1999     // Update the bookmark bar. It may happen that the tab is crashed, and if
2000     // so, the bookmark bar should be hidden.
2001     if (flags & content::INVALIDATE_TYPE_TAB)
2002       UpdateBookmarkBarState(BOOKMARK_BAR_STATE_CHANGE_TAB_STATE);
2003
2004     // We don't need to process INVALIDATE_STATE, since that's not visible.
2005   }
2006
2007   scheduled_updates_.clear();
2008 }
2009
2010 void Browser::RemoveScheduledUpdatesFor(WebContents* contents) {
2011   if (!contents)
2012     return;
2013
2014   UpdateMap::iterator i = scheduled_updates_.find(contents);
2015   if (i != scheduled_updates_.end())
2016     scheduled_updates_.erase(i);
2017 }
2018
2019 ///////////////////////////////////////////////////////////////////////////////
2020 // Browser, Getters for UI (private):
2021
2022 StatusBubble* Browser::GetStatusBubble() {
2023   // In kiosk and exclusive app mode, we want to always hide the status bubble.
2024   if (chrome::IsRunningInAppMode())
2025     return NULL;
2026
2027   return window_ ? window_->GetStatusBubble() : NULL;
2028 }
2029
2030 ///////////////////////////////////////////////////////////////////////////////
2031 // Browser, Session restore functions (private):
2032
2033 void Browser::SyncHistoryWithTabs(int index) {
2034   SessionService* session_service =
2035       SessionServiceFactory::GetForProfileIfExisting(profile());
2036   if (session_service) {
2037     for (int i = index; i < tab_strip_model_->count(); ++i) {
2038       WebContents* web_contents = tab_strip_model_->GetWebContentsAt(i);
2039       if (web_contents) {
2040         SessionTabHelper* session_tab_helper =
2041             SessionTabHelper::FromWebContents(web_contents);
2042         session_service->SetTabIndexInWindow(
2043             session_id(), session_tab_helper->session_id(), i);
2044         session_service->SetPinnedState(
2045             session_id(),
2046             session_tab_helper->session_id(),
2047             tab_strip_model_->IsTabPinned(i));
2048       }
2049     }
2050   }
2051 }
2052
2053 ///////////////////////////////////////////////////////////////////////////////
2054 // Browser, In-progress download termination handling (private):
2055
2056 bool Browser::CanCloseWithInProgressDownloads() {
2057   // If we've prompted, we need to hear from the user before we
2058   // can close.
2059   if (cancel_download_confirmation_state_ != NOT_PROMPTED)
2060     return cancel_download_confirmation_state_ != WAITING_FOR_RESPONSE;
2061
2062   int num_downloads_blocking;
2063   Browser::DownloadClosePreventionType dialog_type =
2064       OkToCloseWithInProgressDownloads(&num_downloads_blocking);
2065   if (dialog_type == DOWNLOAD_CLOSE_OK)
2066     return true;
2067
2068   // Closing this window will kill some downloads; prompt to make sure
2069   // that's ok.
2070   cancel_download_confirmation_state_ = WAITING_FOR_RESPONSE;
2071   window_->ConfirmBrowserCloseWithPendingDownloads(
2072       num_downloads_blocking,
2073       dialog_type,
2074       false,
2075       base::Bind(&Browser::InProgressDownloadResponse,
2076                  weak_factory_.GetWeakPtr()));
2077
2078   // Return false so the browser does not close.  We'll close if the user
2079   // confirms in the dialog.
2080   return false;
2081 }
2082
2083 ///////////////////////////////////////////////////////////////////////////////
2084 // Browser, Assorted utility functions (private):
2085
2086 void Browser::SetAsDelegate(WebContents* web_contents, Browser* delegate) {
2087   // WebContents...
2088   web_contents->SetDelegate(delegate);
2089
2090   // ...and all the helpers.
2091   BookmarkTabHelper::FromWebContents(web_contents)->set_delegate(delegate);
2092   WebContentsModalDialogManager::FromWebContents(web_contents)->
2093       SetDelegate(delegate);
2094   CoreTabHelper::FromWebContents(web_contents)->set_delegate(delegate);
2095   SearchEngineTabHelper::FromWebContents(web_contents)->set_delegate(delegate);
2096   ZoomController::FromWebContents(web_contents)->set_observer(delegate);
2097   TranslateTabHelper* translate_tab_helper =
2098       TranslateTabHelper::FromWebContents(web_contents);
2099   translate_tab_helper->language_state().set_observer(
2100       delegate ? delegate->language_state_observer_.get() : NULL);
2101 }
2102
2103 void Browser::CloseFrame() {
2104   window_->Close();
2105 }
2106
2107 void Browser::TabDetachedAtImpl(content::WebContents* contents,
2108                                 int index,
2109                                 DetachType type) {
2110   if (type == DETACH_TYPE_DETACH) {
2111     // Save the current location bar state, but only if the tab being detached
2112     // is the selected tab.  Because saving state can conditionally revert the
2113     // location bar, saving the current tab's location bar state to a
2114     // non-selected tab can corrupt both tabs.
2115     if (contents == tab_strip_model_->GetActiveWebContents()) {
2116       LocationBar* location_bar = window()->GetLocationBar();
2117       if (location_bar)
2118         location_bar->SaveStateToContents(contents);
2119     }
2120
2121     if (!tab_strip_model_->closing_all())
2122       SyncHistoryWithTabs(0);
2123   }
2124
2125   SetAsDelegate(contents, NULL);
2126   RemoveScheduledUpdatesFor(contents);
2127
2128   if (find_bar_controller_.get() && index == tab_strip_model_->active_index()) {
2129     find_bar_controller_->ChangeWebContents(NULL);
2130   }
2131
2132   // Stop observing search model changes for this tab.
2133   search_delegate_->OnTabDetached(contents);
2134
2135   for (size_t i = 0; i < interstitial_observers_.size(); i++) {
2136     if (interstitial_observers_[i]->web_contents() != contents)
2137       continue;
2138
2139     delete interstitial_observers_[i];
2140     interstitial_observers_.erase(interstitial_observers_.begin() + i);
2141     return;
2142   }
2143 }
2144
2145 bool Browser::SupportsWindowFeatureImpl(WindowFeature feature,
2146                                         bool check_fullscreen) const {
2147   bool hide_ui_for_fullscreen = check_fullscreen && ShouldHideUIForFullscreen();
2148
2149   unsigned int features = FEATURE_INFOBAR | FEATURE_DOWNLOADSHELF;
2150
2151   if (is_type_tabbed())
2152     features |= FEATURE_BOOKMARKBAR;
2153
2154   if (!hide_ui_for_fullscreen) {
2155     if (!is_type_tabbed())
2156       features |= FEATURE_TITLEBAR;
2157
2158     if (is_type_tabbed())
2159       features |= FEATURE_TABSTRIP;
2160
2161     if (is_type_tabbed())
2162       features |= FEATURE_TOOLBAR;
2163
2164     if (!is_app() || ((app_type() == APP_TYPE_HOST ||
2165                        app_name() == DevToolsWindow::kDevToolsApp) &&
2166                       CommandLine::ForCurrentProcess()->HasSwitch(
2167                           switches::kEnableStreamlinedHostedApps))) {
2168       features |= FEATURE_LOCATIONBAR;
2169     }
2170   }
2171   return !!(features & feature);
2172 }
2173
2174 void Browser::UpdateBookmarkBarState(BookmarkBarStateChangeReason reason) {
2175   BookmarkBar::State state;
2176   // The bookmark bar is hidden in fullscreen mode, unless on the new tab page.
2177   if (browser_defaults::bookmarks_enabled &&
2178       profile_->GetPrefs()->GetBoolean(prefs::kShowBookmarkBar) &&
2179       !ShouldHideUIForFullscreen()) {
2180     state = BookmarkBar::SHOW;
2181   } else {
2182     WebContents* web_contents = tab_strip_model_->GetActiveWebContents();
2183     BookmarkTabHelper* bookmark_tab_helper =
2184         web_contents ? BookmarkTabHelper::FromWebContents(web_contents) : NULL;
2185     if (bookmark_tab_helper && bookmark_tab_helper->ShouldShowBookmarkBar())
2186       state = BookmarkBar::DETACHED;
2187     else
2188       state = BookmarkBar::HIDDEN;
2189   }
2190
2191   if (state == bookmark_bar_state_)
2192     return;
2193
2194   bookmark_bar_state_ = state;
2195
2196   if (!window_)
2197     return;  // This is called from the constructor when window_ is NULL.
2198
2199   if (reason == BOOKMARK_BAR_STATE_CHANGE_TAB_SWITCH) {
2200     // Don't notify BrowserWindow on a tab switch as at the time this is invoked
2201     // BrowserWindow hasn't yet switched tabs. The BrowserWindow implementations
2202     // end up querying state once they process the tab switch.
2203     return;
2204   }
2205
2206   bool shouldAnimate = reason == BOOKMARK_BAR_STATE_CHANGE_PREF_CHANGE;
2207   window_->BookmarkBarStateChanged(shouldAnimate ?
2208       BookmarkBar::ANIMATE_STATE_CHANGE :
2209       BookmarkBar::DONT_ANIMATE_STATE_CHANGE);
2210 }
2211
2212 bool Browser::ShouldHideUIForFullscreen() const {
2213   // Windows and GTK remove the top controls in fullscreen, but Mac and Ash
2214   // keep the controls in a slide-down panel.
2215   return window_ && window_->ShouldHideUIForFullscreen();
2216 }
2217
2218 bool Browser::MaybeCreateBackgroundContents(
2219     int route_id,
2220     WebContents* opener_web_contents,
2221     const base::string16& frame_name,
2222     const GURL& target_url,
2223     const std::string& partition_id,
2224     content::SessionStorageNamespace* session_storage_namespace) {
2225   GURL opener_url = opener_web_contents->GetURL();
2226   ExtensionService* extensions_service =
2227       extensions::ExtensionSystem::Get(profile_)->extension_service();
2228
2229   if (!opener_url.is_valid() ||
2230       frame_name.empty() ||
2231       !extensions_service ||
2232       !extensions_service->is_ready())
2233     return false;
2234
2235   // Only hosted apps have web extents, so this ensures that only hosted apps
2236   // can create BackgroundContents. We don't have to check for background
2237   // permission as that is checked in RenderMessageFilter when the CreateWindow
2238   // message is processed.
2239   const Extension* extension =
2240       extensions_service->extensions()->GetHostedAppByURL(opener_url);
2241   if (!extension)
2242     return false;
2243
2244   // No BackgroundContents allowed if BackgroundContentsService doesn't exist.
2245   BackgroundContentsService* service =
2246       BackgroundContentsServiceFactory::GetForProfile(profile_);
2247   if (!service)
2248     return false;
2249
2250   // Ensure that we're trying to open this from the extension's process.
2251   SiteInstance* opener_site_instance = opener_web_contents->GetSiteInstance();
2252   extensions::ProcessMap* process_map = extensions::ProcessMap::Get(profile_);
2253   if (!opener_site_instance->GetProcess() ||
2254       !process_map->Contains(
2255           extension->id(), opener_site_instance->GetProcess()->GetID())) {
2256     return false;
2257   }
2258
2259   // Only allow a single background contents per app.
2260   bool allow_js_access = extensions::BackgroundInfo::AllowJSAccess(extension);
2261   BackgroundContents* existing =
2262       service->GetAppBackgroundContents(base::ASCIIToUTF16(extension->id()));
2263   if (existing) {
2264     // For non-scriptable background contents, ignore the request altogether,
2265     // (returning true, so that a regular WebContents isn't created either).
2266     if (!allow_js_access)
2267       return true;
2268     // For scriptable background pages, if one already exists, close it (even
2269     // if it was specified in the manifest).
2270     delete existing;
2271   }
2272
2273   // If script access is not allowed, create the the background contents in a
2274   // new SiteInstance, so that a separate process is used.
2275   scoped_refptr<content::SiteInstance> site_instance =
2276       allow_js_access ?
2277       opener_site_instance :
2278       content::SiteInstance::Create(opener_web_contents->GetBrowserContext());
2279
2280   // Passed all the checks, so this should be created as a BackgroundContents.
2281   BackgroundContents* contents =
2282       service->CreateBackgroundContents(site_instance.get(),
2283                                         route_id,
2284                                         profile_,
2285                                         frame_name,
2286                                         base::ASCIIToUTF16(extension->id()),
2287                                         partition_id,
2288                                         session_storage_namespace);
2289
2290   // When a separate process is used, the original renderer cannot access the
2291   // new window later, thus we need to navigate the window now.
2292   if (contents && !allow_js_access) {
2293     contents->web_contents()->GetController().LoadURL(
2294         target_url,
2295         content::Referrer(),
2296         content::PAGE_TRANSITION_LINK,
2297         std::string());  // No extra headers.
2298   }
2299
2300   return contents != NULL;
2301 }