chrome/browser/browser_process_impl.cc

   1 // Copyright (c) 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/browser_process_impl.h"
   6
   7 #include <algorithm>
   8 #include <map>
   9 #include <vector>
  10
  11 #include "base/atomic_ref_count.h"
  12 #include "base/bind.h"
  13 #include "base/bind_helpers.h"
  14 #include "base/command_line.h"
  15 #include "base/debug/alias.h"
  16 #include "base/debug/leak_annotations.h"
  17 #include "base/files/file_path.h"
  18 #include "base/metrics/field_trial.h"
  19 #include "base/metrics/histogram_macros.h"
  20 #include "base/path_service.h"
  21 #include "base/prefs/json_pref_store.h"
  22 #include "base/prefs/pref_registry_simple.h"
  23 #include "base/prefs/pref_service.h"
  24 #include "base/synchronization/waitable_event.h"
  25 #include "base/threading/thread.h"
  26 #include "base/threading/thread_restrictions.h"
  27 #include "base/time/default_tick_clock.h"
  28 #include "base/trace_event/trace_event.h"
  29 #include "chrome/browser/chrome_browser_main.h"
  30 #include "chrome/browser/chrome_child_process_watcher.h"
  31 #include "chrome/browser/chrome_content_browser_client.h"
  32 #include "chrome/browser/chrome_notification_types.h"
  33 #include "chrome/browser/component_updater/chrome_component_updater_configurator.h"
  34 #include "chrome/browser/component_updater/supervised_user_whitelist_installer.h"
  35 #include "chrome/browser/defaults.h"
  36 #include "chrome/browser/devtools/remote_debugging_server.h"
  37 #include "chrome/browser/download/download_request_limiter.h"
  38 #include "chrome/browser/download/download_status_updater.h"
  39 #include "chrome/browser/first_run/upgrade_util.h"
  40 #include "chrome/browser/gpu/gl_string_manager.h"
  41 #include "chrome/browser/gpu/gpu_mode_manager.h"
  42 #include "chrome/browser/icon_manager.h"
  43 #include "chrome/browser/intranet_redirect_detector.h"
  44 #include "chrome/browser/io_thread.h"
  45 #include "chrome/browser/lifetime/application_lifetime.h"
  46 #include "chrome/browser/metrics/metrics_services_manager.h"
  47 #include "chrome/browser/metrics/thread_watcher.h"
  48 #include "chrome/browser/net/chrome_net_log.h"
  49 #include "chrome/browser/net/crl_set_fetcher.h"
  50 #include "chrome/browser/notifications/notification_ui_manager.h"
  51 #include "chrome/browser/plugins/chrome_plugin_service_filter.h"
  52 #include "chrome/browser/plugins/plugin_finder.h"
  53 #include "chrome/browser/prefs/browser_prefs.h"
  54 #include "chrome/browser/prefs/chrome_pref_service_factory.h"
  55 #include "chrome/browser/printing/background_printing_manager.h"
  56 #include "chrome/browser/printing/print_job_manager.h"
  57 #include "chrome/browser/printing/print_preview_dialog_controller.h"
  58 #include "chrome/browser/profiles/profile_manager.h"
  59 #include "chrome/browser/renderer_host/chrome_resource_dispatcher_host_delegate.h"
  60 #include "chrome/browser/safe_browsing/safe_browsing_service.h"
  61 #include "chrome/browser/shell_integration.h"
  62 #include "chrome/browser/status_icons/status_tray.h"
  63 #include "chrome/browser/ui/browser_dialogs.h"
  64 #include "chrome/browser/ui/browser_finder.h"
  65 #include "chrome/browser/ui/user_manager.h"
  66 #include "chrome/browser/update_client/chrome_update_query_params_delegate.h"
  67 #include "chrome/browser/web_resource/promo_resource_service.h"
  68 #include "chrome/common/chrome_constants.h"
  69 #include "chrome/common/chrome_paths.h"
  70 #include "chrome/common/chrome_switches.h"
  71 #include "chrome/common/extensions/chrome_extensions_client.h"
  72 #include "chrome/common/pref_names.h"
  73 #include "chrome/common/switch_utils.h"
  74 #include "chrome/common/url_constants.h"
  75 #include "chrome/installer/util/google_update_constants.h"
  76 #include "chrome/installer/util/google_update_settings.h"
  77 #include "components/component_updater/component_updater_service.h"
  78 #include "components/gcm_driver/gcm_driver.h"
  79 #include "components/metrics/metrics_service.h"
  80 #include "components/network_time/network_time_tracker.h"
  81 #include "components/policy/core/common/policy_service.h"
  82 #include "components/signin/core/common/profile_management_switches.h"
  83 #include "components/translate/core/browser/translate_download_manager.h"
  84 #include "components/update_client/update_query_params.h"
  85 #include "components/web_resource/web_resource_pref_names.h"
  86 #include "content/public/browser/browser_thread.h"
  87 #include "content/public/browser/child_process_security_policy.h"
  88 #include "content/public/browser/notification_details.h"
  89 #include "content/public/browser/plugin_service.h"
  90 #include "content/public/browser/render_process_host.h"
  91 #include "content/public/browser/resource_dispatcher_host.h"
  92 #include "content/public/browser/service_worker_context.h"
  93 #include "content/public/browser/storage_partition.h"
  94 #include "extensions/common/constants.h"
  95 #include "net/socket/client_socket_pool_manager.h"
  96 #include "net/url_request/url_request_context_getter.h"
  97 #include "ui/base/idle/idle.h"
  98 #include "ui/base/l10n/l10n_util.h"
  99 #include "ui/message_center/message_center.h"
 100
 101 #if defined(OS_WIN)
 102 #include "base/win/windows_version.h"
 103 #include "ui/views/focus/view_storage.h"
 104 #elif defined(OS_MACOSX)
 105 #include "chrome/browser/chrome_browser_main_mac.h"
 106 #endif
 107
 108 #if !defined(OS_ANDROID)
 109 #include "chrome/browser/chrome_device_client.h"
 110 #include "chrome/browser/services/gcm/gcm_desktop_utils.h"
 111 #include "components/gcm_driver/gcm_client_factory.h"
 112 #endif
 113
 114 #if defined(USE_AURA)
 115 #include "ui/aura/env.h"
 116 #endif
 117
 118 #if defined(ENABLE_BACKGROUND)
 119 #include "chrome/browser/background/background_mode_manager.h"
 120 #endif
 121
 122 #if defined(ENABLE_CONFIGURATION_POLICY)
 123 #include "components/policy/core/browser/browser_policy_connector.h"
 124 #else
 125 #include "components/policy/core/common/policy_service_stub.h"
 126 #endif  // defined(ENABLE_CONFIGURATION_POLICY)
 127
 128 #if defined(ENABLE_EXTENSIONS)
 129 #include "chrome/browser/extensions/chrome_extensions_browser_client.h"
 130 #include "chrome/browser/extensions/event_router_forwarder.h"
 131 #include "chrome/browser/extensions/extension_renderer_state.h"
 132 #include "chrome/browser/media_galleries/media_file_system_registry.h"
 133 #include "chrome/browser/ui/apps/chrome_app_window_client.h"
 134 #include "components/storage_monitor/storage_monitor.h"
 135 #include "extensions/common/extension_l10n_util.h"
 136 #endif
 137
 138 #if !defined(DISABLE_NACL)
 139 #include "chrome/browser/component_updater/pnacl_component_installer.h"
 140 #endif
 141
 142 #if defined(ENABLE_PLUGIN_INSTALLATION)
 143 #include "chrome/browser/plugins/plugins_resource_service.h"
 144 #endif
 145
 146 #if defined(ENABLE_WEBRTC)
 147 #include "chrome/browser/media/webrtc_log_uploader.h"
 148 #endif
 149
 150 #if (defined(OS_WIN) || defined(OS_LINUX)) && !defined(OS_CHROMEOS)
 151 // How often to check if the persistent instance of Chrome needs to restart
 152 // to install an update.
 153 static const int kUpdateCheckIntervalHours = 6;
 154 #endif
 155
 156 #if defined(USE_X11) || defined(OS_WIN) || defined(USE_OZONE)
 157 // How long to wait for the File thread to complete during EndSession, on Linux
 158 // and Windows. We have a timeout here because we're unable to run the UI
 159 // messageloop and there's some deadlock risk. Our only option is to exit
 160 // anyway.
 161 static const int kEndSessionTimeoutSeconds = 10;
 162 #endif
 163
 164 using content::BrowserThread;
 165 using content::ChildProcessSecurityPolicy;
 166 using content::PluginService;
 167 using content::ResourceDispatcherHost;
 168
 169 BrowserProcessImpl::BrowserProcessImpl(
 170     base::SequencedTaskRunner* local_state_task_runner,
 171     const base::CommandLine& command_line)
 172     : created_watchdog_thread_(false),
 173       created_browser_policy_connector_(false),
 174       created_profile_manager_(false),
 175       created_local_state_(false),
 176       created_icon_manager_(false),
 177       created_notification_ui_manager_(false),
 178       created_safe_browsing_service_(false),
 179       module_ref_count_(0),
 180       did_start_(false),
 181       download_status_updater_(new DownloadStatusUpdater),
 182       local_state_task_runner_(local_state_task_runner) {
 183   g_browser_process = this;
 184   platform_part_.reset(new BrowserProcessPlatformPart());
 185
 186 #if defined(ENABLE_PRINTING)
 187   // Must be created after the NotificationService.
 188   print_job_manager_.reset(new printing::PrintJobManager);
 189 #endif
 190
 191   net_log_.reset(new ChromeNetLog);
 192
 193   ChildProcessSecurityPolicy::GetInstance()->RegisterWebSafeScheme(
 194       extensions::kExtensionScheme);
 195   ChildProcessSecurityPolicy::GetInstance()->RegisterWebSafeScheme(
 196       extensions::kExtensionResourceScheme);
 197   ChildProcessSecurityPolicy::GetInstance()->RegisterWebSafeScheme(
 198       chrome::kChromeSearchScheme);
 199
 200 #if defined(OS_MACOSX)
 201   ui::InitIdleMonitor();
 202 #endif
 203
 204 #if !defined(OS_ANDROID)
 205   device_client_.reset(new ChromeDeviceClient);
 206 #endif
 207
 208 #if defined(ENABLE_EXTENSIONS)
 209   // Athena sets its own instance during Athena's init process.
 210   extensions::AppWindowClient::Set(ChromeAppWindowClient::GetInstance());
 211
 212   extension_event_router_forwarder_ = new extensions::EventRouterForwarder;
 213   ExtensionRendererState::GetInstance()->Init();
 214
 215   extensions::ExtensionsClient::Set(
 216       extensions::ChromeExtensionsClient::GetInstance());
 217
 218   extensions_browser_client_.reset(
 219       new extensions::ChromeExtensionsBrowserClient);
 220   extensions::ExtensionsBrowserClient::Set(extensions_browser_client_.get());
 221 #endif
 222
 223   message_center::MessageCenter::Initialize();
 224
 225   update_client::UpdateQueryParams::SetDelegate(
 226       ChromeUpdateQueryParamsDelegate::GetInstance());
 227 }
 228
 229 BrowserProcessImpl::~BrowserProcessImpl() {
 230   tracked_objects::ThreadData::EnsureCleanupWasCalled(4);
 231
 232   g_browser_process = NULL;
 233 }
 234
 235 void BrowserProcessImpl::StartTearDown() {
 236     TRACE_EVENT0("shutdown", "BrowserProcessImpl::StartTearDown");
 237   // We need to destroy the MetricsServicesManager, IntranetRedirectDetector,
 238   // PromoResourceService, and SafeBrowsing ClientSideDetectionService (owned by
 239   // the SafeBrowsingService) before the io_thread_ gets destroyed, since their
 240   // destructors can call the URLFetcher destructor, which does a
 241   // PostDelayedTask operation on the IO thread. (The IO thread will handle that
 242   // URLFetcher operation before going away.)
 243   metrics_services_manager_.reset();
 244   intranet_redirect_detector_.reset();
 245 #if defined(SAFE_BROWSING_SERVICE)
 246   if (safe_browsing_service_.get())
 247     safe_browsing_service()->ShutDown();
 248 #endif
 249 #if defined(ENABLE_PLUGIN_INSTALLATION)
 250   plugins_resource_service_.reset();
 251 #endif
 252
 253   // Need to clear the desktop notification balloons before the io_thread_ and
 254   // before the profiles, since if there are any still showing we will access
 255   // those things during teardown.
 256   notification_ui_manager_.reset();
 257
 258   // The SupervisedUserWhitelistInstaller observes the ProfileInfoCache, so it
 259   // needs to be shut down before the ProfileManager.
 260   supervised_user_whitelist_installer_.reset();
 261
 262   // Need to clear profiles (download managers) before the io_thread_.
 263   {
 264     TRACE_EVENT0("shutdown",
 265                  "BrowserProcessImpl::StartTearDown:ProfileManager");
 266     // The desktop User Manager needs to be closed before the guest profile
 267     // can be destroyed.
 268     if (switches::IsNewAvatarMenu())
 269       UserManager::Hide();
 270     profile_manager_.reset();
 271   }
 272
 273   // PromoResourceService must be destroyed after the keyed services and before
 274   // the IO thread.
 275   promo_resource_service_.reset();
 276
 277   child_process_watcher_.reset();
 278
 279 #if !defined(OS_ANDROID)
 280   // Debugger must be cleaned up before IO thread and NotificationService.
 281   remote_debugging_server_.reset();
 282 #endif
 283
 284 #if defined(ENABLE_EXTENSIONS)
 285   ExtensionRendererState::GetInstance()->Shutdown();
 286
 287   media_file_system_registry_.reset();
 288   // Remove the global instance of the Storage Monitor now. Otherwise the
 289   // FILE thread would be gone when we try to release it in the dtor and
 290   // Valgrind would report a leak on almost every single browser_test.
 291   // TODO(gbillock): Make this unnecessary.
 292   storage_monitor::StorageMonitor::Destroy();
 293 #endif
 294
 295   message_center::MessageCenter::Shutdown();
 296
 297 #if defined(ENABLE_CONFIGURATION_POLICY)
 298   // The policy providers managed by |browser_policy_connector_| need to shut
 299   // down while the IO and FILE threads are still alive. The monitoring
 300   // framework owned by |browser_policy_connector_| relies on |gcm_driver_|, so
 301   // this must be shutdown before |gcm_driver_| below.
 302   if (browser_policy_connector_)
 303     browser_policy_connector_->Shutdown();
 304 #endif
 305
 306   // The |gcm_driver_| must shut down while the IO thread is still alive.
 307   if (gcm_driver_)
 308     gcm_driver_->Shutdown();
 309
 310   // Stop the watchdog thread before stopping other threads.
 311   watchdog_thread_.reset();
 312
 313 #if defined(USE_AURA)
 314   // Delete aura after the metrics service has been deleted as it accesses
 315   // monitor information.
 316   aura::Env::DeleteInstance();
 317 #endif
 318
 319   platform_part()->StartTearDown();
 320
 321 #if defined(ENABLE_WEBRTC)
 322   // Cancel any uploads to release the system url request context references.
 323   if (webrtc_log_uploader_)
 324     webrtc_log_uploader_->StartShutdown();
 325 #endif
 326
 327   if (local_state())
 328     local_state()->CommitPendingWrite();
 329 }
 330
 331 void BrowserProcessImpl::PostDestroyThreads() {
 332   // With the file_thread_ flushed, we can release any icon resources.
 333   icon_manager_.reset();
 334
 335 #if defined(ENABLE_WEBRTC)
 336   // Must outlive the file thread.
 337   webrtc_log_uploader_.reset();
 338 #endif
 339
 340   // Reset associated state right after actual thread is stopped,
 341   // as io_thread_.global_ cleanup happens in CleanUp on the IO
 342   // thread, i.e. as the thread exits its message loop.
 343   //
 344   // This is important also because in various places, the
 345   // IOThread object being NULL is considered synonymous with the
 346   // IO thread having stopped.
 347   io_thread_.reset();
 348 }
 349
 350 unsigned int BrowserProcessImpl::AddRefModule() {
 351   DCHECK(CalledOnValidThread());
 352
 353   // CHECK(!IsShuttingDown());
 354   if (IsShuttingDown()) {
 355     // Copy the stacktrace which released the final reference onto our stack so
 356     // it will be available in the crash report for inspection.
 357     base::debug::StackTrace callstack = release_last_reference_callstack_;
 358     base::debug::Alias(&callstack);
 359     CHECK(false);
 360   }
 361
 362   did_start_ = true;
 363   module_ref_count_++;
 364   return module_ref_count_;
 365 }
 366
 367 unsigned int BrowserProcessImpl::ReleaseModule() {
 368   DCHECK(CalledOnValidThread());
 369   DCHECK_NE(0u, module_ref_count_);
 370   module_ref_count_--;
 371   if (0 == module_ref_count_) {
 372     release_last_reference_callstack_ = base::debug::StackTrace();
 373
 374 #if defined(ENABLE_PRINTING)
 375     // Wait for the pending print jobs to finish. Don't do this later, since
 376     // this might cause a nested message loop to run, and we don't want pending
 377     // tasks to run once teardown has started.
 378     print_job_manager_->Shutdown();
 379 #endif
 380
 381 #if defined(LEAK_SANITIZER)
 382     // Check for memory leaks now, before we start shutting down threads. Doing
 383     // this early means we won't report any shutdown-only leaks (as they have
 384     // not yet happened at this point).
 385     // If leaks are found, this will make the process exit immediately.
 386     __lsan_do_leak_check();
 387 #endif
 388
 389     CHECK(base::MessageLoop::current()->is_running());
 390
 391 #if defined(OS_MACOSX)
 392     base::MessageLoop::current()->PostTask(
 393         FROM_HERE,
 394         base::Bind(ChromeBrowserMainPartsMac::DidEndMainMessageLoop));
 395 #endif
 396     base::MessageLoop::current()->Quit();
 397   }
 398   return module_ref_count_;
 399 }
 400
 401 namespace {
 402
 403 // Used at the end of session to block the UI thread for completion of sentinel
 404 // tasks on the set of threads used to persist profile data and local state.
 405 // This is done to ensure that the data has been persisted to disk before
 406 // continuing.
 407 class RundownTaskCounter :
 408     public base::RefCountedThreadSafe<RundownTaskCounter> {
 409  public:
 410   RundownTaskCounter();
 411
 412   // Posts a rundown task to |task_runner|, can be invoked an arbitrary number
 413   // of times before calling TimedWait.
 414   void Post(base::SequencedTaskRunner* task_runner);
 415
 416   // Waits until the count is zero or |max_time| has passed.
 417   // This can only be called once per instance.
 418   bool TimedWait(const base::TimeDelta& max_time);
 419
 420  private:
 421   friend class base::RefCountedThreadSafe<RundownTaskCounter>;
 422   ~RundownTaskCounter() {}
 423
 424   // Decrements the counter and releases the waitable event on transition to
 425   // zero.
 426   void Decrement();
 427
 428   // The count starts at one to defer the possibility of one->zero transitions
 429   // until TimedWait is called.
 430   base::AtomicRefCount count_;
 431   base::WaitableEvent waitable_event_;
 432
 433   DISALLOW_COPY_AND_ASSIGN(RundownTaskCounter);
 434 };
 435
 436 RundownTaskCounter::RundownTaskCounter()
 437     : count_(1), waitable_event_(true, false) {
 438 }
 439
 440 void RundownTaskCounter::Post(base::SequencedTaskRunner* task_runner) {
 441   // As the count starts off at one, it should never get to zero unless
 442   // TimedWait has been called.
 443   DCHECK(!base::AtomicRefCountIsZero(&count_));
 444
 445   base::AtomicRefCountInc(&count_);
 446
 447   // The task must be non-nestable to guarantee that it runs after all tasks
 448   // currently scheduled on |task_runner| have completed.
 449   task_runner->PostNonNestableTask(FROM_HERE,
 450       base::Bind(&RundownTaskCounter::Decrement, this));
 451 }
 452
 453 void RundownTaskCounter::Decrement() {
 454   if (!base::AtomicRefCountDec(&count_))
 455     waitable_event_.Signal();
 456 }
 457
 458 bool RundownTaskCounter::TimedWait(const base::TimeDelta& max_time) {
 459   // Decrement the excess count from the constructor.
 460   Decrement();
 461
 462   return waitable_event_.TimedWait(max_time);
 463 }
 464
 465 }  // namespace
 466
 467 void BrowserProcessImpl::EndSession() {
 468   // Mark all the profiles as clean.
 469   ProfileManager* pm = profile_manager();
 470   std::vector<Profile*> profiles(pm->GetLoadedProfiles());
 471   scoped_refptr<RundownTaskCounter> rundown_counter(new RundownTaskCounter());
 472   for (size_t i = 0; i < profiles.size(); ++i) {
 473     Profile* profile = profiles[i];
 474     profile->SetExitType(Profile::EXIT_SESSION_ENDED);
 475     if (profile->GetPrefs()) {
 476       profile->GetPrefs()->CommitPendingWrite();
 477       rundown_counter->Post(profile->GetIOTaskRunner().get());
 478     }
 479   }
 480
 481   // Tell the metrics service it was cleanly shutdown.
 482   metrics::MetricsService* metrics = g_browser_process->metrics_service();
 483   if (metrics && local_state()) {
 484     metrics->RecordStartOfSessionEnd();
 485 #if !defined(OS_CHROMEOS)
 486     // MetricsService lazily writes to prefs, force it to write now.
 487     // On ChromeOS, chrome gets killed when hangs, so no need to
 488     // commit metrics::prefs::kStabilitySessionEndCompleted change immediately.
 489     local_state()->CommitPendingWrite();
 490
 491     rundown_counter->Post(local_state_task_runner_.get());
 492 #endif
 493   }
 494
 495   // http://crbug.com/125207
 496   base::ThreadRestrictions::ScopedAllowWait allow_wait;
 497
 498   // We must write that the profile and metrics service shutdown cleanly,
 499   // otherwise on startup we'll think we crashed. So we block until done and
 500   // then proceed with normal shutdown.
 501   //
 502   // If you change the condition here, be sure to also change
 503   // ProfileBrowserTests to match.
 504 #if defined(USE_X11) || defined(OS_WIN) || defined(USE_OZONE)
 505   // Do a best-effort wait on the successful countdown of rundown tasks. Note
 506   // that if we don't complete "quickly enough", Windows will terminate our
 507   // process.
 508   //
 509   // On Windows, we previously posted a message to FILE and then ran a nested
 510   // message loop, waiting for that message to be processed until quitting.
 511   // However, doing so means that other messages will also be processed. In
 512   // particular, if the GPU process host notices that the GPU has been killed
 513   // during shutdown, it races exiting the nested loop with the process host
 514   // blocking the message loop attempting to re-establish a connection to the
 515   // GPU process synchronously. Because the system may not be allowing
 516   // processes to launch, this can result in a hang. See
 517   // http://crbug.com/318527.
 518   rundown_counter->TimedWait(
 519       base::TimeDelta::FromSeconds(kEndSessionTimeoutSeconds));
 520 #else
 521   NOTIMPLEMENTED();
 522 #endif
 523 }
 524
 525 MetricsServicesManager* BrowserProcessImpl::GetMetricsServicesManager() {
 526   DCHECK(CalledOnValidThread());
 527   if (!metrics_services_manager_)
 528     metrics_services_manager_.reset(new MetricsServicesManager(local_state()));
 529   return metrics_services_manager_.get();
 530 }
 531
 532 metrics::MetricsService* BrowserProcessImpl::metrics_service() {
 533   DCHECK(CalledOnValidThread());
 534   return GetMetricsServicesManager()->GetMetricsService();
 535 }
 536
 537 rappor::RapporService* BrowserProcessImpl::rappor_service() {
 538   DCHECK(CalledOnValidThread());
 539   return GetMetricsServicesManager()->GetRapporService();
 540 }
 541
 542 IOThread* BrowserProcessImpl::io_thread() {
 543   DCHECK(CalledOnValidThread());
 544   DCHECK(io_thread_.get());
 545   return io_thread_.get();
 546 }
 547
 548 WatchDogThread* BrowserProcessImpl::watchdog_thread() {
 549   DCHECK(CalledOnValidThread());
 550   if (!created_watchdog_thread_)
 551     CreateWatchdogThread();
 552   DCHECK(watchdog_thread_.get() != NULL);
 553   return watchdog_thread_.get();
 554 }
 555
 556 ProfileManager* BrowserProcessImpl::profile_manager() {
 557   DCHECK(CalledOnValidThread());
 558   if (!created_profile_manager_)
 559     CreateProfileManager();
 560   return profile_manager_.get();
 561 }
 562
 563 PrefService* BrowserProcessImpl::local_state() {
 564   DCHECK(CalledOnValidThread());
 565   if (!created_local_state_)
 566     CreateLocalState();
 567   return local_state_.get();
 568 }
 569
 570 net::URLRequestContextGetter* BrowserProcessImpl::system_request_context() {
 571   DCHECK(CalledOnValidThread());
 572   return io_thread()->system_url_request_context_getter();
 573 }
 574
 575 chrome_variations::VariationsService* BrowserProcessImpl::variations_service() {
 576   DCHECK(CalledOnValidThread());
 577   return GetMetricsServicesManager()->GetVariationsService();
 578 }
 579
 580 PromoResourceService* BrowserProcessImpl::promo_resource_service() {
 581   DCHECK(CalledOnValidThread());
 582   return promo_resource_service_.get();
 583 }
 584
 585 BrowserProcessPlatformPart* BrowserProcessImpl::platform_part() {
 586   return platform_part_.get();
 587 }
 588
 589 extensions::EventRouterForwarder*
 590 BrowserProcessImpl::extension_event_router_forwarder() {
 591 #if defined(ENABLE_EXTENSIONS)
 592   return extension_event_router_forwarder_.get();
 593 #else
 594   return NULL;
 595 #endif
 596 }
 597
 598 NotificationUIManager* BrowserProcessImpl::notification_ui_manager() {
 599   DCHECK(CalledOnValidThread());
 600   if (!created_notification_ui_manager_)
 601     CreateNotificationUIManager();
 602   return notification_ui_manager_.get();
 603 }
 604
 605 message_center::MessageCenter* BrowserProcessImpl::message_center() {
 606   DCHECK(CalledOnValidThread());
 607   return message_center::MessageCenter::Get();
 608 }
 609
 610 policy::BrowserPolicyConnector* BrowserProcessImpl::browser_policy_connector() {
 611   DCHECK(CalledOnValidThread());
 612 #if defined(ENABLE_CONFIGURATION_POLICY)
 613   if (!created_browser_policy_connector_) {
 614     DCHECK(!browser_policy_connector_);
 615     browser_policy_connector_ = platform_part_->CreateBrowserPolicyConnector();
 616     created_browser_policy_connector_ = true;
 617   }
 618   return browser_policy_connector_.get();
 619 #else
 620   return NULL;
 621 #endif
 622 }
 623
 624 policy::PolicyService* BrowserProcessImpl::policy_service() {
 625 #if defined(ENABLE_CONFIGURATION_POLICY)
 626   return browser_policy_connector()->GetPolicyService();
 627 #else
 628   if (!policy_service_.get())
 629     policy_service_.reset(new policy::PolicyServiceStub());
 630   return policy_service_.get();
 631 #endif
 632 }
 633
 634 IconManager* BrowserProcessImpl::icon_manager() {
 635   DCHECK(CalledOnValidThread());
 636   if (!created_icon_manager_)
 637     CreateIconManager();
 638   return icon_manager_.get();
 639 }
 640
 641 GLStringManager* BrowserProcessImpl::gl_string_manager() {
 642   DCHECK(CalledOnValidThread());
 643   if (!gl_string_manager_.get())
 644     gl_string_manager_.reset(new GLStringManager());
 645   return gl_string_manager_.get();
 646 }
 647
 648 GpuModeManager* BrowserProcessImpl::gpu_mode_manager() {
 649   DCHECK(CalledOnValidThread());
 650   if (!gpu_mode_manager_.get())
 651     gpu_mode_manager_.reset(new GpuModeManager());
 652   return gpu_mode_manager_.get();
 653 }
 654
 655 void BrowserProcessImpl::CreateDevToolsHttpProtocolHandler(
 656     chrome::HostDesktopType host_desktop_type,
 657     const std::string& ip,
 658     uint16 port) {
 659   DCHECK(CalledOnValidThread());
 660 #if !defined(OS_ANDROID)
 661   // StartupBrowserCreator::LaunchBrowser can be run multiple times when browser
 662   // is started with several profiles or existing browser process is reused.
 663   if (!remote_debugging_server_.get()) {
 664     remote_debugging_server_.reset(
 665         new RemoteDebuggingServer(host_desktop_type, ip, port));
 666   }
 667 #endif
 668 }
 669
 670 bool BrowserProcessImpl::IsShuttingDown() {
 671   DCHECK(CalledOnValidThread());
 672   return did_start_ && 0 == module_ref_count_;
 673 }
 674
 675 printing::PrintJobManager* BrowserProcessImpl::print_job_manager() {
 676   DCHECK(CalledOnValidThread());
 677   return print_job_manager_.get();
 678 }
 679
 680 printing::PrintPreviewDialogController*
 681     BrowserProcessImpl::print_preview_dialog_controller() {
 682 #if defined(ENABLE_PRINT_PREVIEW)
 683   DCHECK(CalledOnValidThread());
 684   if (!print_preview_dialog_controller_.get())
 685     CreatePrintPreviewDialogController();
 686   return print_preview_dialog_controller_.get();
 687 #else
 688   NOTIMPLEMENTED();
 689   return NULL;
 690 #endif
 691 }
 692
 693 printing::BackgroundPrintingManager*
 694     BrowserProcessImpl::background_printing_manager() {
 695 #if defined(ENABLE_PRINT_PREVIEW)
 696   DCHECK(CalledOnValidThread());
 697   if (!background_printing_manager_.get())
 698     CreateBackgroundPrintingManager();
 699   return background_printing_manager_.get();
 700 #else
 701   NOTIMPLEMENTED();
 702   return NULL;
 703 #endif
 704 }
 705
 706 IntranetRedirectDetector* BrowserProcessImpl::intranet_redirect_detector() {
 707   DCHECK(CalledOnValidThread());
 708   if (!intranet_redirect_detector_.get())
 709     CreateIntranetRedirectDetector();
 710   return intranet_redirect_detector_.get();
 711 }
 712
 713 const std::string& BrowserProcessImpl::GetApplicationLocale() {
 714   DCHECK(!locale_.empty());
 715   return locale_;
 716 }
 717
 718 void BrowserProcessImpl::SetApplicationLocale(const std::string& locale) {
 719   locale_ = locale;
 720 #if defined(ENABLE_EXTENSIONS)
 721   extension_l10n_util::SetProcessLocale(locale);
 722 #endif
 723   chrome::ChromeContentBrowserClient::SetApplicationLocale(locale);
 724   translate::TranslateDownloadManager::GetInstance()->set_application_locale(
 725       locale);
 726 }
 727
 728 DownloadStatusUpdater* BrowserProcessImpl::download_status_updater() {
 729   return download_status_updater_.get();
 730 }
 731
 732 MediaFileSystemRegistry* BrowserProcessImpl::media_file_system_registry() {
 733 #if defined(ENABLE_EXTENSIONS)
 734   if (!media_file_system_registry_)
 735     media_file_system_registry_.reset(new MediaFileSystemRegistry());
 736   return media_file_system_registry_.get();
 737 #else
 738   return NULL;
 739 #endif
 740 }
 741
 742 bool BrowserProcessImpl::created_local_state() const {
 743   return created_local_state_;
 744 }
 745
 746 #if defined(ENABLE_WEBRTC)
 747 WebRtcLogUploader* BrowserProcessImpl::webrtc_log_uploader() {
 748   if (!webrtc_log_uploader_.get())
 749     webrtc_log_uploader_.reset(new WebRtcLogUploader());
 750   return webrtc_log_uploader_.get();
 751 }
 752 #endif
 753
 754 network_time::NetworkTimeTracker* BrowserProcessImpl::network_time_tracker() {
 755   if (!network_time_tracker_) {
 756     network_time_tracker_.reset(new network_time::NetworkTimeTracker(
 757         scoped_ptr<base::TickClock>(new base::DefaultTickClock()),
 758         local_state()));
 759   }
 760   return network_time_tracker_.get();
 761 }
 762
 763 gcm::GCMDriver* BrowserProcessImpl::gcm_driver() {
 764   DCHECK(CalledOnValidThread());
 765   if (!gcm_driver_)
 766     CreateGCMDriver();
 767   return gcm_driver_.get();
 768 }
 769
 770 // static
 771 void BrowserProcessImpl::RegisterPrefs(PrefRegistrySimple* registry) {
 772   registry->RegisterBooleanPref(prefs::kDefaultBrowserSettingEnabled,
 773                                 false);
 774   // This policy needs to be defined before the net subsystem is initialized,
 775   // so we do it here.
 776   registry->RegisterIntegerPref(prefs::kMaxConnectionsPerProxy,
 777                                 net::kDefaultMaxSocketsPerProxyServer);
 778
 779   registry->RegisterBooleanPref(prefs::kAllowCrossOriginAuthPrompt, false);
 780
 781 #if defined(OS_CHROMEOS) || defined(OS_ANDROID) || defined(OS_IOS)
 782   registry->RegisterBooleanPref(prefs::kEulaAccepted, false);
 783 #endif  // defined(OS_CHROMEOS) || defined(OS_ANDROID) || defined(OS_IOS)
 784 #if defined(OS_WIN)
 785   if (base::win::GetVersion() >= base::win::VERSION_WIN7) {
 786     registry->RegisterStringPref(prefs::kRelaunchMode,
 787                                  upgrade_util::kRelaunchModeDefault);
 788   }
 789 #endif
 790
 791   // TODO(brettw,*): this comment about ResourceBundle was here since
 792   // initial commit.  This comment seems unrelated, bit-rotten and
 793   // a candidate for removal.
 794   // Initialize ResourceBundle which handles files loaded from external
 795   // sources. This has to be done before uninstall code path and before prefs
 796   // are registered.
 797   registry->RegisterStringPref(prefs::kApplicationLocale, std::string());
 798 #if defined(OS_CHROMEOS)
 799   registry->RegisterStringPref(prefs::kOwnerLocale, std::string());
 800   registry->RegisterStringPref(prefs::kHardwareKeyboardLayout,
 801                                std::string());
 802 #endif  // defined(OS_CHROMEOS)
 803 #if !defined(OS_CHROMEOS)
 804   registry->RegisterBooleanPref(
 805       prefs::kMetricsReportingEnabled,
 806       GoogleUpdateSettings::GetCollectStatsConsent());
 807 #endif  // !defined(OS_CHROMEOS)
 808
 809 #if defined(OS_ANDROID)
 810   registry->RegisterBooleanPref(
 811       prefs::kCrashReportingEnabled, false);
 812 #endif  // defined(OS_ANDROID)
 813 }
 814
 815 DownloadRequestLimiter* BrowserProcessImpl::download_request_limiter() {
 816   DCHECK(CalledOnValidThread());
 817   if (!download_request_limiter_.get())
 818     download_request_limiter_ = new DownloadRequestLimiter();
 819   return download_request_limiter_.get();
 820 }
 821
 822 BackgroundModeManager* BrowserProcessImpl::background_mode_manager() {
 823   DCHECK(CalledOnValidThread());
 824 #if defined(ENABLE_BACKGROUND)
 825   if (!background_mode_manager_.get())
 826     CreateBackgroundModeManager();
 827   return background_mode_manager_.get();
 828 #else
 829   NOTIMPLEMENTED();
 830   return NULL;
 831 #endif
 832 }
 833
 834 void BrowserProcessImpl::set_background_mode_manager_for_test(
 835     scoped_ptr<BackgroundModeManager> manager) {
 836 #if defined(ENABLE_BACKGROUND)
 837   background_mode_manager_ = manager.Pass();
 838 #endif
 839 }
 840
 841 StatusTray* BrowserProcessImpl::status_tray() {
 842   DCHECK(CalledOnValidThread());
 843   if (!status_tray_.get())
 844     CreateStatusTray();
 845   return status_tray_.get();
 846 }
 847
 848
 849 SafeBrowsingService* BrowserProcessImpl::safe_browsing_service() {
 850   DCHECK(CalledOnValidThread());
 851   if (!created_safe_browsing_service_)
 852     CreateSafeBrowsingService();
 853   return safe_browsing_service_.get();
 854 }
 855
 856 safe_browsing::ClientSideDetectionService*
 857     BrowserProcessImpl::safe_browsing_detection_service() {
 858   DCHECK(CalledOnValidThread());
 859   if (safe_browsing_service())
 860     return safe_browsing_service()->safe_browsing_detection_service();
 861   return NULL;
 862 }
 863
 864 #if (defined(OS_WIN) || defined(OS_LINUX)) && !defined(OS_CHROMEOS)
 865 void BrowserProcessImpl::StartAutoupdateTimer() {
 866   autoupdate_timer_.Start(FROM_HERE,
 867       base::TimeDelta::FromHours(kUpdateCheckIntervalHours),
 868       this,
 869       &BrowserProcessImpl::OnAutoupdateTimer);
 870 }
 871 #endif
 872
 873 ChromeNetLog* BrowserProcessImpl::net_log() {
 874   return net_log_.get();
 875 }
 876
 877 component_updater::ComponentUpdateService*
 878 BrowserProcessImpl::component_updater() {
 879   if (!component_updater_.get()) {
 880     if (!BrowserThread::CurrentlyOn(BrowserThread::UI))
 881       return NULL;
 882     scoped_refptr<update_client::Configurator> configurator =
 883         component_updater::MakeChromeComponentUpdaterConfigurator(
 884             base::CommandLine::ForCurrentProcess(),
 885             io_thread()->system_url_request_context_getter());
 886     // Creating the component updater does not do anything, components
 887     // need to be registered and Start() needs to be called.
 888     component_updater_.reset(component_updater::ComponentUpdateServiceFactory(
 889                                  configurator).release());
 890   }
 891   return component_updater_.get();
 892 }
 893
 894 CRLSetFetcher* BrowserProcessImpl::crl_set_fetcher() {
 895   if (!crl_set_fetcher_)
 896     crl_set_fetcher_ = new CRLSetFetcher();
 897   return crl_set_fetcher_.get();
 898 }
 899
 900 component_updater::PnaclComponentInstaller*
 901 BrowserProcessImpl::pnacl_component_installer() {
 902 #if !defined(DISABLE_NACL)
 903   if (!pnacl_component_installer_) {
 904     pnacl_component_installer_ =
 905         new component_updater::PnaclComponentInstaller();
 906   }
 907   return pnacl_component_installer_.get();
 908 #else
 909   return nullptr;
 910 #endif
 911 }
 912
 913 component_updater::SupervisedUserWhitelistInstaller*
 914 BrowserProcessImpl::supervised_user_whitelist_installer() {
 915   if (!supervised_user_whitelist_installer_) {
 916     supervised_user_whitelist_installer_ =
 917         component_updater::SupervisedUserWhitelistInstaller::Create(
 918             component_updater(), &profile_manager()->GetProfileInfoCache(),
 919             local_state());
 920   }
 921   return supervised_user_whitelist_installer_.get();
 922 }
 923
 924 void BrowserProcessImpl::ResourceDispatcherHostCreated() {
 925   resource_dispatcher_host_delegate_.reset(
 926       new ChromeResourceDispatcherHostDelegate);
 927   ResourceDispatcherHost::Get()->SetDelegate(
 928       resource_dispatcher_host_delegate_.get());
 929
 930   pref_change_registrar_.Add(
 931       prefs::kAllowCrossOriginAuthPrompt,
 932       base::Bind(&BrowserProcessImpl::ApplyAllowCrossOriginAuthPromptPolicy,
 933                  base::Unretained(this)));
 934   ApplyAllowCrossOriginAuthPromptPolicy();
 935 }
 936
 937 void BrowserProcessImpl::CreateWatchdogThread() {
 938   DCHECK(!created_watchdog_thread_ && watchdog_thread_.get() == NULL);
 939   created_watchdog_thread_ = true;
 940
 941   scoped_ptr<WatchDogThread> thread(new WatchDogThread());
 942   base::Thread::Options options;
 943   options.timer_slack = base::TIMER_SLACK_MAXIMUM;
 944   if (!thread->StartWithOptions(options))
 945     return;
 946   watchdog_thread_.swap(thread);
 947 }
 948
 949 void BrowserProcessImpl::CreateProfileManager() {
 950   DCHECK(!created_profile_manager_ && profile_manager_.get() == NULL);
 951   created_profile_manager_ = true;
 952
 953   base::FilePath user_data_dir;
 954   PathService::Get(chrome::DIR_USER_DATA, &user_data_dir);
 955   profile_manager_.reset(new ProfileManager(user_data_dir));
 956 }
 957
 958 void BrowserProcessImpl::CreateLocalState() {
 959   DCHECK(!created_local_state_ && local_state_.get() == NULL);
 960   created_local_state_ = true;
 961
 962   base::FilePath local_state_path;
 963   CHECK(PathService::Get(chrome::FILE_LOCAL_STATE, &local_state_path));
 964   scoped_refptr<PrefRegistrySimple> pref_registry = new PrefRegistrySimple;
 965
 966   // Register local state preferences.
 967   chrome::RegisterLocalState(pref_registry.get());
 968
 969   local_state_ =
 970       chrome_prefs::CreateLocalState(local_state_path,
 971                                      local_state_task_runner_.get(),
 972                                      policy_service(),
 973                                      pref_registry,
 974                                      false).Pass();
 975
 976   pref_change_registrar_.Init(local_state_.get());
 977
 978   // Initialize the notification for the default browser setting policy.
 979   pref_change_registrar_.Add(
 980       prefs::kDefaultBrowserSettingEnabled,
 981       base::Bind(&BrowserProcessImpl::ApplyDefaultBrowserPolicy,
 982                  base::Unretained(this)));
 983
 984   // This preference must be kept in sync with external values; update them
 985   // whenever the preference or its controlling policy changes.
 986 #if !defined(OS_CHROMEOS) && !defined(OS_ANDROID) && !defined(OS_IOS)
 987   pref_change_registrar_.Add(
 988       prefs::kMetricsReportingEnabled,
 989       base::Bind(&BrowserProcessImpl::ApplyMetricsReportingPolicy,
 990                  base::Unretained(this)));
 991 #endif
 992
 993   int max_per_proxy = local_state_->GetInteger(prefs::kMaxConnectionsPerProxy);
 994   net::ClientSocketPoolManager::set_max_sockets_per_proxy_server(
 995       net::HttpNetworkSession::NORMAL_SOCKET_POOL,
 996       std::max(std::min(max_per_proxy, 99),
 997                net::ClientSocketPoolManager::max_sockets_per_group(
 998                    net::HttpNetworkSession::NORMAL_SOCKET_POOL)));
 999 }
1000
1001 void BrowserProcessImpl::PreCreateThreads() {
1002   io_thread_.reset(
1003       new IOThread(local_state(), policy_service(), net_log_.get(),
1004                    extension_event_router_forwarder()));
1005 }
1006
1007 void BrowserProcessImpl::PreMainMessageLoopRun() {
1008   TRACE_EVENT0("startup", "BrowserProcessImpl::PreMainMessageLoopRun");
1009   SCOPED_UMA_HISTOGRAM_TIMER(
1010       "Startup.BrowserProcessImpl_PreMainMessageLoopRunTime");
1011
1012 #if defined(ENABLE_CONFIGURATION_POLICY)
1013   // browser_policy_connector() is created very early because local_state()
1014   // needs policy to be initialized with the managed preference values.
1015   // However, policy fetches from the network and loading of disk caches
1016   // requires that threads are running; this Init() call lets the connector
1017   // resume its initialization now that the loops are spinning and the
1018   // system request context is available for the fetchers.
1019   browser_policy_connector()->Init(local_state(), system_request_context());
1020 #endif
1021
1022   if (local_state_->IsManagedPreference(prefs::kDefaultBrowserSettingEnabled))
1023     ApplyDefaultBrowserPolicy();
1024
1025 #if !defined(OS_CHROMEOS) && !defined(OS_ANDROID) && !defined(OS_IOS)
1026   ApplyMetricsReportingPolicy();
1027 #endif
1028
1029 #if defined(ENABLE_PLUGINS)
1030   PluginService* plugin_service = PluginService::GetInstance();
1031   plugin_service->SetFilter(ChromePluginServiceFilter::GetInstance());
1032   plugin_service->StartWatchingPlugins();
1033
1034 #if defined(OS_POSIX)
1035   // Also find plugins in a user-specific plugins dir,
1036   // e.g. ~/.config/chromium/Plugins.
1037   const base::CommandLine& cmd_line = *base::CommandLine::ForCurrentProcess();
1038   if (!cmd_line.HasSwitch(switches::kDisablePluginsDiscovery)) {
1039     base::FilePath user_data_dir;
1040     if (PathService::Get(chrome::DIR_USER_DATA, &user_data_dir))
1041       plugin_service->AddExtraPluginDir(user_data_dir.Append("Plugins"));
1042   }
1043 #endif
1044
1045   // Triggers initialization of the singleton instance on UI thread.
1046   PluginFinder::GetInstance()->Init();
1047
1048 #if defined(ENABLE_PLUGIN_INSTALLATION)
1049   DCHECK(!plugins_resource_service_.get());
1050   plugins_resource_service_.reset(new PluginsResourceService(local_state()));
1051   plugins_resource_service_->Init();
1052 #endif
1053 #endif  // defined(ENABLE_PLUGINS)
1054
1055   const base::CommandLine& command_line =
1056       *base::CommandLine::ForCurrentProcess();
1057   if (!command_line.HasSwitch(switches::kDisableWebResources)) {
1058     DCHECK(!promo_resource_service_.get());
1059     promo_resource_service_.reset(new PromoResourceService);
1060     promo_resource_service_->StartAfterDelay();
1061   }
1062
1063 #if !defined(OS_ANDROID) && !defined(OS_IOS)
1064   storage_monitor::StorageMonitor::Create();
1065 #endif
1066
1067   child_process_watcher_.reset(new ChromeChildProcessWatcher());
1068
1069   platform_part_->PreMainMessageLoopRun();
1070 }
1071
1072 void BrowserProcessImpl::CreateIconManager() {
1073   DCHECK(!created_icon_manager_ && icon_manager_.get() == NULL);
1074   created_icon_manager_ = true;
1075   icon_manager_.reset(new IconManager);
1076 }
1077
1078 void BrowserProcessImpl::CreateIntranetRedirectDetector() {
1079   DCHECK(intranet_redirect_detector_.get() == NULL);
1080   scoped_ptr<IntranetRedirectDetector> intranet_redirect_detector(
1081       new IntranetRedirectDetector);
1082   intranet_redirect_detector_.swap(intranet_redirect_detector);
1083 }
1084
1085 void BrowserProcessImpl::CreateNotificationUIManager() {
1086 #if defined(ENABLE_NOTIFICATIONS)
1087   DCHECK(notification_ui_manager_.get() == NULL);
1088   notification_ui_manager_.reset(NotificationUIManager::Create(local_state()));
1089   created_notification_ui_manager_ = true;
1090 #endif
1091 }
1092
1093 void BrowserProcessImpl::CreateBackgroundModeManager() {
1094 #if defined(ENABLE_BACKGROUND)
1095   DCHECK(background_mode_manager_.get() == NULL);
1096   background_mode_manager_.reset(
1097       new BackgroundModeManager(*base::CommandLine::ForCurrentProcess(),
1098                                 &profile_manager()->GetProfileInfoCache()));
1099 #endif
1100 }
1101
1102 void BrowserProcessImpl::CreateStatusTray() {
1103   DCHECK(status_tray_.get() == NULL);
1104   status_tray_.reset(StatusTray::Create());
1105 }
1106
1107 void BrowserProcessImpl::CreatePrintPreviewDialogController() {
1108 #if defined(ENABLE_PRINT_PREVIEW)
1109   DCHECK(print_preview_dialog_controller_.get() == NULL);
1110   print_preview_dialog_controller_ =
1111       new printing::PrintPreviewDialogController();
1112 #else
1113   NOTIMPLEMENTED();
1114 #endif
1115 }
1116
1117 void BrowserProcessImpl::CreateBackgroundPrintingManager() {
1118 #if defined(ENABLE_PRINT_PREVIEW)
1119   DCHECK(background_printing_manager_.get() == NULL);
1120   background_printing_manager_.reset(new printing::BackgroundPrintingManager());
1121 #else
1122   NOTIMPLEMENTED();
1123 #endif
1124 }
1125
1126 void BrowserProcessImpl::CreateSafeBrowsingService() {
1127   DCHECK(safe_browsing_service_.get() == NULL);
1128   // Set this flag to true so that we don't retry indefinitely to
1129   // create the service class if there was an error.
1130   created_safe_browsing_service_ = true;
1131 #if defined(SAFE_BROWSING_SERVICE)
1132   safe_browsing_service_ = SafeBrowsingService::CreateSafeBrowsingService();
1133   safe_browsing_service_->Initialize();
1134 #endif
1135 }
1136
1137 void BrowserProcessImpl::CreateGCMDriver() {
1138   DCHECK(!gcm_driver_);
1139
1140 #if defined(OS_ANDROID)
1141   // Android's GCMDriver currently makes the assumption that it's a singleton.
1142   // Until this gets fixed, instantiating multiple Java GCMDrivers will throw
1143   // an exception, but because they're only initialized on demand these crashes
1144   // would be very difficult to triage. See http://crbug.com/437827.
1145   NOTREACHED();
1146 #else
1147   base::FilePath store_path;
1148   CHECK(PathService::Get(chrome::DIR_GLOBAL_GCM_STORE, &store_path));
1149   gcm_driver_ = gcm::CreateGCMDriverDesktop(
1150       make_scoped_ptr(new gcm::GCMClientFactory),
1151       local_state(),
1152       store_path,
1153       system_request_context());
1154 #endif  // defined(OS_ANDROID)
1155 }
1156
1157 void BrowserProcessImpl::ApplyDefaultBrowserPolicy() {
1158   if (local_state()->GetBoolean(prefs::kDefaultBrowserSettingEnabled)) {
1159     scoped_refptr<ShellIntegration::DefaultWebClientWorker>
1160         set_browser_worker = new ShellIntegration::DefaultBrowserWorker(NULL);
1161     set_browser_worker->StartSetAsDefault();
1162   }
1163 }
1164
1165 void BrowserProcessImpl::ApplyAllowCrossOriginAuthPromptPolicy() {
1166   bool value = local_state()->GetBoolean(prefs::kAllowCrossOriginAuthPrompt);
1167   ResourceDispatcherHost::Get()->SetAllowCrossOriginAuthPrompt(value);
1168 }
1169
1170 void BrowserProcessImpl::ApplyMetricsReportingPolicy() {
1171 #if !defined(OS_CHROMEOS) && !defined(OS_ANDROID) && !defined(OS_IOS)
1172   CHECK(BrowserThread::PostTask(
1173       BrowserThread::FILE, FROM_HERE,
1174       base::Bind(
1175           base::IgnoreResult(&GoogleUpdateSettings::SetCollectStatsConsent),
1176           local_state()->GetBoolean(prefs::kMetricsReportingEnabled))));
1177 #endif
1178 }
1179
1180 // Mac is currently not supported.
1181 #if (defined(OS_WIN) || defined(OS_LINUX)) && !defined(OS_CHROMEOS)
1182
1183 bool BrowserProcessImpl::CanAutorestartForUpdate() const {
1184   // Check if browser is in the background and if it needs to be restarted to
1185   // apply a pending update.
1186   return chrome::GetTotalBrowserCount() == 0 && chrome::WillKeepAlive() &&
1187          upgrade_util::IsUpdatePendingRestart();
1188 }
1189
1190 // Switches to add when auto-restarting Chrome.
1191 const char* const kSwitchesToAddOnAutorestart[] = {
1192   switches::kNoStartupWindow
1193 };
1194
1195 void BrowserProcessImpl::RestartBackgroundInstance() {
1196   base::CommandLine* old_cl = base::CommandLine::ForCurrentProcess();
1197   scoped_ptr<base::CommandLine> new_cl(
1198       new base::CommandLine(old_cl->GetProgram()));
1199
1200   std::map<std::string, base::CommandLine::StringType> switches =
1201       old_cl->GetSwitches();
1202
1203   switches::RemoveSwitchesForAutostart(&switches);
1204
1205   // Append the rest of the switches (along with their values, if any)
1206   // to the new command line
1207   for (std::map<std::string, base::CommandLine::StringType>::const_iterator i =
1208            switches.begin();
1209        i != switches.end(); ++i) {
1210     base::CommandLine::StringType switch_value = i->second;
1211       if (switch_value.length() > 0) {
1212         new_cl->AppendSwitchNative(i->first, i->second);
1213       } else {
1214         new_cl->AppendSwitch(i->first);
1215       }
1216   }
1217
1218   // Ensure that our desired switches are set on the new process.
1219   for (size_t i = 0; i < arraysize(kSwitchesToAddOnAutorestart); ++i) {
1220     if (!new_cl->HasSwitch(kSwitchesToAddOnAutorestart[i]))
1221       new_cl->AppendSwitch(kSwitchesToAddOnAutorestart[i]);
1222   }
1223
1224   DLOG(WARNING) << "Shutting down current instance of the browser.";
1225   chrome::AttemptExit();
1226
1227   // Transfer ownership to Upgrade.
1228   upgrade_util::SetNewCommandLine(new_cl.release());
1229 }
1230
1231 void BrowserProcessImpl::OnAutoupdateTimer() {
1232   if (CanAutorestartForUpdate()) {
1233     DLOG(WARNING) << "Detected update.  Restarting browser.";
1234     RestartBackgroundInstance();
1235   }
1236 }
1237
1238 #endif  // (defined(OS_WIN) || defined(OS_LINUX)) && !defined(OS_CHROMEOS)