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/path_service.h"
  20 #include "base/prefs/json_pref_store.h"
  21 #include "base/prefs/pref_registry_simple.h"
  22 #include "base/prefs/pref_service.h"
  23 #include "base/synchronization/waitable_event.h"
  24 #include "base/threading/thread.h"
  25 #include "base/threading/thread_restrictions.h"
  26 #include "base/time/default_tick_clock.h"
  27 #include "chrome/browser/background/background_mode_manager.h"
  28 #include "chrome/browser/chrome_browser_main.h"
  29 #include "chrome/browser/chrome_content_browser_client.h"
  30 #include "chrome/browser/chrome_notification_types.h"
  31 #include "chrome/browser/component_updater/chrome_component_updater_configurator.h"
  32 #include "chrome/browser/component_updater/pnacl/pnacl_component_installer.h"
  33 #include "chrome/browser/defaults.h"
  34 #include "chrome/browser/devtools/remote_debugging_server.h"
  35 #include "chrome/browser/download/download_request_limiter.h"
  36 #include "chrome/browser/download/download_status_updater.h"
  37 #include "chrome/browser/first_run/upgrade_util.h"
  38 #include "chrome/browser/gpu/gl_string_manager.h"
  39 #include "chrome/browser/gpu/gpu_mode_manager.h"
  40 #include "chrome/browser/icon_manager.h"
  41 #include "chrome/browser/idle.h"
  42 #include "chrome/browser/intranet_redirect_detector.h"
  43 #include "chrome/browser/io_thread.h"
  44 #include "chrome/browser/lifetime/application_lifetime.h"
  45 #include "chrome/browser/metrics/metrics_services_manager.h"
  46 #include "chrome/browser/metrics/thread_watcher.h"
  47 #include "chrome/browser/net/chrome_net_log.h"
  48 #include "chrome/browser/net/crl_set_fetcher.h"
  49 #include "chrome/browser/notifications/notification_ui_manager.h"
  50 #include "chrome/browser/omaha_query_params/chrome_omaha_query_params_delegate.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/prerender/prerender_tracker.h"
  56 #include "chrome/browser/printing/background_printing_manager.h"
  57 #include "chrome/browser/printing/print_job_manager.h"
  58 #include "chrome/browser/printing/print_preview_dialog_controller.h"
  59 #include "chrome/browser/profiles/profile_manager.h"
  60 #include "chrome/browser/renderer_host/chrome_resource_dispatcher_host_delegate.h"
  61 #include "chrome/browser/safe_browsing/safe_browsing_service.h"
  62 #include "chrome/browser/shell_integration.h"
  63 #include "chrome/browser/status_icons/status_tray.h"
  64 #include "chrome/browser/ui/apps/chrome_apps_client.h"
  65 #include "chrome/browser/ui/browser_dialogs.h"
  66 #include "chrome/browser/ui/browser_finder.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/omaha_query_params/omaha_query_params.h"
  82 #include "components/policy/core/common/policy_service.h"
  83 #include "components/signin/core/common/profile_management_switches.h"
  84 #include "components/translate/core/browser/translate_download_manager.h"
  85 #include "content/public/browser/browser_thread.h"
  86 #include "content/public/browser/child_process_security_policy.h"
  87 #include "content/public/browser/notification_details.h"
  88 #include "content/public/browser/plugin_service.h"
  89 #include "content/public/browser/render_process_host.h"
  90 #include "content/public/browser/resource_dispatcher_host.h"
  91 #include "content/public/browser/service_worker_context.h"
  92 #include "content/public/browser/storage_partition.h"
  93 #include "extensions/common/constants.h"
  94 #include "extensions/common/extension_l10n_util.h"
  95 #include "net/socket/client_socket_pool_manager.h"
  96 #include "net/url_request/url_request_context_getter.h"
  97 #include "ui/base/l10n/l10n_util.h"
  98 #include "ui/message_center/message_center.h"
  99
 100 #if defined(OS_WIN)
 101 #include "base/win/windows_version.h"
 102 #include "ui/views/focus/view_storage.h"
 103 #elif defined(OS_MACOSX)
 104 #include "chrome/browser/chrome_browser_main_mac.h"
 105 #endif
 106
 107 #if defined(OS_ANDROID)
 108 #include "components/gcm_driver/gcm_driver_android.h"
 109 #else
 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_CONFIGURATION_POLICY)
 119 #include "components/policy/core/browser/browser_policy_connector.h"
 120 #else
 121 #include "components/policy/core/common/policy_service_stub.h"
 122 #endif  // defined(ENABLE_CONFIGURATION_POLICY)
 123
 124 #if defined(ENABLE_EXTENSIONS)
 125 #include "chrome/browser/extensions/chrome_extensions_browser_client.h"
 126 #include "chrome/browser/extensions/event_router_forwarder.h"
 127 #include "chrome/browser/extensions/extension_renderer_state.h"
 128 #include "chrome/browser/media_galleries/media_file_system_registry.h"
 129 #include "components/storage_monitor/storage_monitor.h"
 130 #endif
 131
 132 #if defined(ENABLE_PLUGIN_INSTALLATION)
 133 #include "chrome/browser/plugins/plugins_resource_service.h"
 134 #endif
 135
 136 #if defined(ENABLE_WEBRTC)
 137 #include "chrome/browser/media/webrtc_log_uploader.h"
 138 #endif
 139
 140 #if (defined(OS_WIN) || defined(OS_LINUX)) && !defined(OS_CHROMEOS)
 141 // How often to check if the persistent instance of Chrome needs to restart
 142 // to install an update.
 143 static const int kUpdateCheckIntervalHours = 6;
 144 #endif
 145
 146 #if defined(USE_X11) || defined(OS_WIN)
 147 // How long to wait for the File thread to complete during EndSession, on Linux
 148 // and Windows. We have a timeout here because we're unable to run the UI
 149 // messageloop and there's some deadlock risk. Our only option is to exit
 150 // anyway.
 151 static const int kEndSessionTimeoutSeconds = 10;
 152 #endif
 153
 154 using content::BrowserThread;
 155 using content::ChildProcessSecurityPolicy;
 156 using content::PluginService;
 157 using content::ResourceDispatcherHost;
 158
 159 BrowserProcessImpl::BrowserProcessImpl(
 160     base::SequencedTaskRunner* local_state_task_runner,
 161     const CommandLine& command_line)
 162     : created_watchdog_thread_(false),
 163       created_browser_policy_connector_(false),
 164       created_profile_manager_(false),
 165       created_local_state_(false),
 166       created_icon_manager_(false),
 167       created_notification_ui_manager_(false),
 168       created_safe_browsing_service_(false),
 169       module_ref_count_(0),
 170       did_start_(false),
 171       download_status_updater_(new DownloadStatusUpdater),
 172       local_state_task_runner_(local_state_task_runner) {
 173   g_browser_process = this;
 174   platform_part_.reset(new BrowserProcessPlatformPart());
 175
 176 #if defined(ENABLE_PRINTING)
 177   // Must be created after the NotificationService.
 178   print_job_manager_.reset(new printing::PrintJobManager);
 179 #endif
 180
 181   net_log_.reset(new ChromeNetLog);
 182
 183   ChildProcessSecurityPolicy::GetInstance()->RegisterWebSafeScheme(
 184       extensions::kExtensionScheme);
 185   ChildProcessSecurityPolicy::GetInstance()->RegisterWebSafeScheme(
 186       extensions::kExtensionResourceScheme);
 187   ChildProcessSecurityPolicy::GetInstance()->RegisterWebSafeScheme(
 188       chrome::kChromeSearchScheme);
 189
 190 #if defined(OS_MACOSX)
 191   InitIdleMonitor();
 192 #endif
 193
 194 #if defined(ENABLE_EXTENSIONS)
 195   apps::AppsClient::Set(ChromeAppsClient::GetInstance());
 196
 197   extension_event_router_forwarder_ = new extensions::EventRouterForwarder;
 198   ExtensionRendererState::GetInstance()->Init();
 199
 200   extensions::ExtensionsClient::Set(
 201       extensions::ChromeExtensionsClient::GetInstance());
 202
 203   extensions_browser_client_.reset(
 204       new extensions::ChromeExtensionsBrowserClient);
 205   extensions::ExtensionsBrowserClient::Set(extensions_browser_client_.get());
 206 #endif
 207
 208   message_center::MessageCenter::Initialize();
 209
 210   omaha_query_params::OmahaQueryParams::SetDelegate(
 211       ChromeOmahaQueryParamsDelegate::GetInstance());
 212 }
 213
 214 BrowserProcessImpl::~BrowserProcessImpl() {
 215   tracked_objects::ThreadData::EnsureCleanupWasCalled(4);
 216
 217   g_browser_process = NULL;
 218 }
 219
 220 void BrowserProcessImpl::StartTearDown() {
 221     TRACE_EVENT0("shutdown", "BrowserProcessImpl::StartTearDown");
 222   // We need to destroy the MetricsServicesManager, IntranetRedirectDetector,
 223   // PromoResourceService, and SafeBrowsing ClientSideDetectionService (owned by
 224   // the SafeBrowsingService) before the io_thread_ gets destroyed, since their
 225   // destructors can call the URLFetcher destructor, which does a
 226   // PostDelayedTask operation on the IO thread. (The IO thread will handle that
 227   // URLFetcher operation before going away.)
 228   metrics_services_manager_.reset();
 229   intranet_redirect_detector_.reset();
 230 #if defined(FULL_SAFE_BROWSING) || defined(MOBILE_SAFE_BROWSING)
 231   if (safe_browsing_service_.get())
 232     safe_browsing_service()->ShutDown();
 233 #endif
 234
 235   // Need to clear the desktop notification balloons before the io_thread_ and
 236   // before the profiles, since if there are any still showing we will access
 237   // those things during teardown.
 238   notification_ui_manager_.reset();
 239
 240   // Need to clear profiles (download managers) before the io_thread_.
 241   {
 242     TRACE_EVENT0("shutdown",
 243                  "BrowserProcessImpl::StartTearDown:ProfileManager");
 244     // The desktop User Manager needs to be closed before the guest profile
 245     // can be destroyed.
 246     if (switches::IsNewAvatarMenu())
 247       chrome::HideUserManager();
 248     profile_manager_.reset();
 249   }
 250
 251 #if !defined(OS_ANDROID)
 252   // Debugger must be cleaned up before IO thread and NotificationService.
 253   remote_debugging_server_.reset();
 254 #endif
 255
 256 #if defined(ENABLE_EXTENSIONS)
 257   ExtensionRendererState::GetInstance()->Shutdown();
 258
 259   media_file_system_registry_.reset();
 260   // Remove the global instance of the Storage Monitor now. Otherwise the
 261   // FILE thread would be gone when we try to release it in the dtor and
 262   // Valgrind would report a leak on almost every single browser_test.
 263   // TODO(gbillock): Make this unnecessary.
 264   storage_monitor::StorageMonitor::Destroy();
 265 #endif
 266
 267   message_center::MessageCenter::Shutdown();
 268
 269 #if defined(ENABLE_CONFIGURATION_POLICY)
 270   // The policy providers managed by |browser_policy_connector_| need to shut
 271   // down while the IO and FILE threads are still alive.
 272   if (browser_policy_connector_)
 273     browser_policy_connector_->Shutdown();
 274 #endif
 275
 276   // The |gcm_driver_| must shut down while the IO thread is still alive.
 277   if (gcm_driver_)
 278     gcm_driver_->Shutdown();
 279
 280   // Stop the watchdog thread before stopping other threads.
 281   watchdog_thread_.reset();
 282
 283 #if defined(USE_AURA)
 284   // Delete aura after the metrics service has been deleted as it accesses
 285   // monitor information.
 286   aura::Env::DeleteInstance();
 287 #endif
 288
 289   platform_part()->StartTearDown();
 290
 291 #if defined(ENABLE_WEBRTC)
 292   // Cancel any uploads to release the system url request context references.
 293   if (webrtc_log_uploader_)
 294     webrtc_log_uploader_->StartShutdown();
 295 #endif
 296
 297   if (local_state())
 298     local_state()->CommitPendingWrite();
 299 }
 300
 301 void BrowserProcessImpl::PostDestroyThreads() {
 302   // With the file_thread_ flushed, we can release any icon resources.
 303   icon_manager_.reset();
 304
 305 #if defined(ENABLE_WEBRTC)
 306   // Must outlive the file thread.
 307   webrtc_log_uploader_.reset();
 308 #endif
 309
 310   // Reset associated state right after actual thread is stopped,
 311   // as io_thread_.global_ cleanup happens in CleanUp on the IO
 312   // thread, i.e. as the thread exits its message loop.
 313   //
 314   // This is important also because in various places, the
 315   // IOThread object being NULL is considered synonymous with the
 316   // IO thread having stopped.
 317   io_thread_.reset();
 318 }
 319
 320 unsigned int BrowserProcessImpl::AddRefModule() {
 321   DCHECK(CalledOnValidThread());
 322
 323   // CHECK(!IsShuttingDown());
 324   if (IsShuttingDown()) {
 325     // Copy the stacktrace which released the final reference onto our stack so
 326     // it will be available in the crash report for inspection.
 327     base::debug::StackTrace callstack = release_last_reference_callstack_;
 328     base::debug::Alias(&callstack);
 329     CHECK(false);
 330   }
 331
 332   did_start_ = true;
 333   module_ref_count_++;
 334   return module_ref_count_;
 335 }
 336
 337 static void ShutdownServiceWorkerContext(content::StoragePartition* partition) {
 338   partition->GetServiceWorkerContext()->Terminate();
 339 }
 340
 341 unsigned int BrowserProcessImpl::ReleaseModule() {
 342   DCHECK(CalledOnValidThread());
 343   DCHECK_NE(0u, module_ref_count_);
 344   module_ref_count_--;
 345   if (0 == module_ref_count_) {
 346     release_last_reference_callstack_ = base::debug::StackTrace();
 347
 348     // Stop service workers
 349     ProfileManager* pm = profile_manager();
 350     std::vector<Profile*> profiles(pm->GetLoadedProfiles());
 351     for (size_t i = 0; i < profiles.size(); ++i) {
 352       content::BrowserContext::ForEachStoragePartition(
 353           profiles[i], base::Bind(ShutdownServiceWorkerContext));
 354     }
 355
 356 #if defined(ENABLE_PRINTING)
 357     // Wait for the pending print jobs to finish. Don't do this later, since
 358     // this might cause a nested message loop to run, and we don't want pending
 359     // tasks to run once teardown has started.
 360     print_job_manager_->Shutdown();
 361 #endif
 362
 363 #if defined(LEAK_SANITIZER)
 364     // Check for memory leaks now, before we start shutting down threads. Doing
 365     // this early means we won't report any shutdown-only leaks (as they have
 366     // not yet happened at this point).
 367     // If leaks are found, this will make the process exit immediately.
 368     __lsan_do_leak_check();
 369 #endif
 370
 371     CHECK(base::MessageLoop::current()->is_running());
 372
 373 #if defined(OS_MACOSX)
 374     base::MessageLoop::current()->PostTask(
 375         FROM_HERE,
 376         base::Bind(ChromeBrowserMainPartsMac::DidEndMainMessageLoop));
 377 #endif
 378     base::MessageLoop::current()->Quit();
 379   }
 380   return module_ref_count_;
 381 }
 382
 383 namespace {
 384
 385 // Used at the end of session to block the UI thread for completion of sentinel
 386 // tasks on the set of threads used to persist profile data and local state.
 387 // This is done to ensure that the data has been persisted to disk before
 388 // continuing.
 389 class RundownTaskCounter :
 390     public base::RefCountedThreadSafe<RundownTaskCounter> {
 391  public:
 392   RundownTaskCounter();
 393
 394   // Posts a rundown task to |task_runner|, can be invoked an arbitrary number
 395   // of times before calling TimedWait.
 396   void Post(base::SequencedTaskRunner* task_runner);
 397
 398   // Waits until the count is zero or |max_time| has passed.
 399   // This can only be called once per instance.
 400   bool TimedWait(const base::TimeDelta& max_time);
 401
 402  private:
 403   friend class base::RefCountedThreadSafe<RundownTaskCounter>;
 404   ~RundownTaskCounter() {}
 405
 406   // Decrements the counter and releases the waitable event on transition to
 407   // zero.
 408   void Decrement();
 409
 410   // The count starts at one to defer the possibility of one->zero transitions
 411   // until TimedWait is called.
 412   base::AtomicRefCount count_;
 413   base::WaitableEvent waitable_event_;
 414
 415   DISALLOW_COPY_AND_ASSIGN(RundownTaskCounter);
 416 };
 417
 418 RundownTaskCounter::RundownTaskCounter()
 419     : count_(1), waitable_event_(true, false) {
 420 }
 421
 422 void RundownTaskCounter::Post(base::SequencedTaskRunner* task_runner) {
 423   // As the count starts off at one, it should never get to zero unless
 424   // TimedWait has been called.
 425   DCHECK(!base::AtomicRefCountIsZero(&count_));
 426
 427   base::AtomicRefCountInc(&count_);
 428
 429   // The task must be non-nestable to guarantee that it runs after all tasks
 430   // currently scheduled on |task_runner| have completed.
 431   task_runner->PostNonNestableTask(FROM_HERE,
 432       base::Bind(&RundownTaskCounter::Decrement, this));
 433 }
 434
 435 void RundownTaskCounter::Decrement() {
 436   if (!base::AtomicRefCountDec(&count_))
 437     waitable_event_.Signal();
 438 }
 439
 440 bool RundownTaskCounter::TimedWait(const base::TimeDelta& max_time) {
 441   // Decrement the excess count from the constructor.
 442   Decrement();
 443
 444   return waitable_event_.TimedWait(max_time);
 445 }
 446
 447 bool ExperimentUseBrokenSynchronization() {
 448   // The logoff behavior used to have a race, whereby it would perform profile
 449   // IO writes on the blocking thread pool, but would sycnhronize to the FILE
 450   // thread. Windows feels free to terminate any process that's hidden or
 451   // destroyed all it's windows, and sometimes Chrome would be terminated
 452   // with pending profile IO due to this mis-synchronization.
 453   // Under the "WindowsLogoffRace" experiment group, the broken behavior is
 454   // emulated, in order to allow measuring what fraction of unclean shutdowns
 455   // are due to this bug.
 456   const std::string group_name =
 457       base::FieldTrialList::FindFullName("WindowsLogoffRace");
 458   return group_name == "BrokenSynchronization";
 459 }
 460
 461 }  // namespace
 462
 463 void BrowserProcessImpl::EndSession() {
 464   bool use_broken_synchronization = ExperimentUseBrokenSynchronization();
 465
 466   // Mark all the profiles as clean.
 467   ProfileManager* pm = profile_manager();
 468   std::vector<Profile*> profiles(pm->GetLoadedProfiles());
 469   scoped_refptr<RundownTaskCounter> rundown_counter(new RundownTaskCounter());
 470   for (size_t i = 0; i < profiles.size(); ++i) {
 471     Profile* profile = profiles[i];
 472     profile->SetExitType(Profile::EXIT_SESSION_ENDED);
 473
 474     if (!use_broken_synchronization)
 475       rundown_counter->Post(profile->GetIOTaskRunner());
 476   }
 477
 478   // Tell the metrics service it was cleanly shutdown.
 479   MetricsService* metrics = g_browser_process->metrics_service();
 480   if (metrics && local_state()) {
 481     metrics->RecordStartOfSessionEnd();
 482 #if !defined(OS_CHROMEOS)
 483     // MetricsService lazily writes to prefs, force it to write now.
 484     // On ChromeOS, chrome gets killed when hangs, so no need to
 485     // commit metrics::prefs::kStabilitySessionEndCompleted change immediately.
 486     local_state()->CommitPendingWrite();
 487
 488     if (!use_broken_synchronization)
 489       rundown_counter->Post(local_state_task_runner_);
 490 #endif
 491   }
 492
 493   // http://crbug.com/125207
 494   base::ThreadRestrictions::ScopedAllowWait allow_wait;
 495
 496   // We must write that the profile and metrics service shutdown cleanly,
 497   // otherwise on startup we'll think we crashed. So we block until done and
 498   // then proceed with normal shutdown.
 499   //
 500   // If you change the condition here, be sure to also change
 501   // ProfileBrowserTests to match.
 502 #if defined(USE_X11) || defined(OS_WIN)
 503   if (use_broken_synchronization) {
 504     rundown_counter->Post(
 505         BrowserThread::GetMessageLoopProxyForThread(BrowserThread::FILE));
 506   }
 507
 508   // Do a best-effort wait on the successful countdown of rundown tasks. Note
 509   // that if we don't complete "quickly enough", Windows will terminate our
 510   // process.
 511   //
 512   // On Windows, we previously posted a message to FILE and then ran a nested
 513   // message loop, waiting for that message to be processed until quitting.
 514   // However, doing so means that other messages will also be processed. In
 515   // particular, if the GPU process host notices that the GPU has been killed
 516   // during shutdown, it races exiting the nested loop with the process host
 517   // blocking the message loop attempting to re-establish a connection to the
 518   // GPU process synchronously. Because the system may not be allowing
 519   // processes to launch, this can result in a hang. See
 520   // http://crbug.com/318527.
 521   rundown_counter->TimedWait(
 522       base::TimeDelta::FromSeconds(kEndSessionTimeoutSeconds));
 523 #else
 524   NOTIMPLEMENTED();
 525 #endif
 526 }
 527
 528 MetricsServicesManager* BrowserProcessImpl::GetMetricsServicesManager() {
 529   DCHECK(CalledOnValidThread());
 530   if (!metrics_services_manager_)
 531     metrics_services_manager_.reset(new MetricsServicesManager(local_state()));
 532   return metrics_services_manager_.get();
 533 }
 534
 535 MetricsService* BrowserProcessImpl::metrics_service() {
 536   DCHECK(CalledOnValidThread());
 537   return GetMetricsServicesManager()->GetMetricsService();
 538 }
 539
 540 rappor::RapporService* BrowserProcessImpl::rappor_service() {
 541   DCHECK(CalledOnValidThread());
 542   return GetMetricsServicesManager()->GetRapporService();
 543 }
 544
 545 IOThread* BrowserProcessImpl::io_thread() {
 546   DCHECK(CalledOnValidThread());
 547   DCHECK(io_thread_.get());
 548   return io_thread_.get();
 549 }
 550
 551 WatchDogThread* BrowserProcessImpl::watchdog_thread() {
 552   DCHECK(CalledOnValidThread());
 553   if (!created_watchdog_thread_)
 554     CreateWatchdogThread();
 555   DCHECK(watchdog_thread_.get() != NULL);
 556   return watchdog_thread_.get();
 557 }
 558
 559 ProfileManager* BrowserProcessImpl::profile_manager() {
 560   DCHECK(CalledOnValidThread());
 561   if (!created_profile_manager_)
 562     CreateProfileManager();
 563   return profile_manager_.get();
 564 }
 565
 566 PrefService* BrowserProcessImpl::local_state() {
 567   DCHECK(CalledOnValidThread());
 568   if (!created_local_state_)
 569     CreateLocalState();
 570   return local_state_.get();
 571 }
 572
 573 net::URLRequestContextGetter* BrowserProcessImpl::system_request_context() {
 574   DCHECK(CalledOnValidThread());
 575   return io_thread()->system_url_request_context_getter();
 576 }
 577
 578 chrome_variations::VariationsService* BrowserProcessImpl::variations_service() {
 579   DCHECK(CalledOnValidThread());
 580   return GetMetricsServicesManager()->GetVariationsService();
 581 }
 582
 583 BrowserProcessPlatformPart* BrowserProcessImpl::platform_part() {
 584   return platform_part_.get();
 585 }
 586
 587 extensions::EventRouterForwarder*
 588 BrowserProcessImpl::extension_event_router_forwarder() {
 589 #if defined(ENABLE_EXTENSIONS)
 590   return extension_event_router_forwarder_.get();
 591 #else
 592   return NULL;
 593 #endif
 594 }
 595
 596 NotificationUIManager* BrowserProcessImpl::notification_ui_manager() {
 597   DCHECK(CalledOnValidThread());
 598   if (!created_notification_ui_manager_)
 599     CreateNotificationUIManager();
 600   return notification_ui_manager_.get();
 601 }
 602
 603 message_center::MessageCenter* BrowserProcessImpl::message_center() {
 604   DCHECK(CalledOnValidThread());
 605   return message_center::MessageCenter::Get();
 606 }
 607
 608 policy::BrowserPolicyConnector* BrowserProcessImpl::browser_policy_connector() {
 609   DCHECK(CalledOnValidThread());
 610 #if defined(ENABLE_CONFIGURATION_POLICY)
 611   if (!created_browser_policy_connector_) {
 612     DCHECK(!browser_policy_connector_);
 613     browser_policy_connector_ = platform_part_->CreateBrowserPolicyConnector();
 614     created_browser_policy_connector_ = true;
 615   }
 616   return browser_policy_connector_.get();
 617 #else
 618   return NULL;
 619 #endif
 620 }
 621
 622 policy::PolicyService* BrowserProcessImpl::policy_service() {
 623 #if defined(ENABLE_CONFIGURATION_POLICY)
 624   return browser_policy_connector()->GetPolicyService();
 625 #else
 626   if (!policy_service_.get())
 627     policy_service_.reset(new policy::PolicyServiceStub());
 628   return policy_service_.get();
 629 #endif
 630 }
 631
 632 IconManager* BrowserProcessImpl::icon_manager() {
 633   DCHECK(CalledOnValidThread());
 634   if (!created_icon_manager_)
 635     CreateIconManager();
 636   return icon_manager_.get();
 637 }
 638
 639 GLStringManager* BrowserProcessImpl::gl_string_manager() {
 640   DCHECK(CalledOnValidThread());
 641   if (!gl_string_manager_.get())
 642     gl_string_manager_.reset(new GLStringManager());
 643   return gl_string_manager_.get();
 644 }
 645
 646 GpuModeManager* BrowserProcessImpl::gpu_mode_manager() {
 647   DCHECK(CalledOnValidThread());
 648   if (!gpu_mode_manager_.get())
 649     gpu_mode_manager_.reset(new GpuModeManager());
 650   return gpu_mode_manager_.get();
 651 }
 652
 653 void BrowserProcessImpl::CreateDevToolsHttpProtocolHandler(
 654     chrome::HostDesktopType host_desktop_type,
 655     const std::string& ip,
 656     int port) {
 657   DCHECK(CalledOnValidThread());
 658 #if !defined(OS_ANDROID)
 659   // StartupBrowserCreator::LaunchBrowser can be run multiple times when browser
 660   // is started with several profiles or existing browser process is reused.
 661   if (!remote_debugging_server_.get()) {
 662     remote_debugging_server_.reset(
 663         new RemoteDebuggingServer(host_desktop_type, ip, port));
 664   }
 665 #endif
 666 }
 667
 668 bool BrowserProcessImpl::IsShuttingDown() {
 669   DCHECK(CalledOnValidThread());
 670   return did_start_ && 0 == module_ref_count_;
 671 }
 672
 673 printing::PrintJobManager* BrowserProcessImpl::print_job_manager() {
 674   DCHECK(CalledOnValidThread());
 675   return print_job_manager_.get();
 676 }
 677
 678 printing::PrintPreviewDialogController*
 679     BrowserProcessImpl::print_preview_dialog_controller() {
 680 #if defined(ENABLE_FULL_PRINTING)
 681   DCHECK(CalledOnValidThread());
 682   if (!print_preview_dialog_controller_.get())
 683     CreatePrintPreviewDialogController();
 684   return print_preview_dialog_controller_.get();
 685 #else
 686   NOTIMPLEMENTED();
 687   return NULL;
 688 #endif
 689 }
 690
 691 printing::BackgroundPrintingManager*
 692     BrowserProcessImpl::background_printing_manager() {
 693 #if defined(ENABLE_FULL_PRINTING)
 694   DCHECK(CalledOnValidThread());
 695   if (!background_printing_manager_.get())
 696     CreateBackgroundPrintingManager();
 697   return background_printing_manager_.get();
 698 #else
 699   NOTIMPLEMENTED();
 700   return NULL;
 701 #endif
 702 }
 703
 704 IntranetRedirectDetector* BrowserProcessImpl::intranet_redirect_detector() {
 705   DCHECK(CalledOnValidThread());
 706   if (!intranet_redirect_detector_.get())
 707     CreateIntranetRedirectDetector();
 708   return intranet_redirect_detector_.get();
 709 }
 710
 711 const std::string& BrowserProcessImpl::GetApplicationLocale() {
 712   DCHECK(!locale_.empty());
 713   return locale_;
 714 }
 715
 716 void BrowserProcessImpl::SetApplicationLocale(const std::string& locale) {
 717   locale_ = locale;
 718   extension_l10n_util::SetProcessLocale(locale);
 719   chrome::ChromeContentBrowserClient::SetApplicationLocale(locale);
 720   translate::TranslateDownloadManager::GetInstance()->set_application_locale(
 721       locale);
 722 }
 723
 724 DownloadStatusUpdater* BrowserProcessImpl::download_status_updater() {
 725   return download_status_updater_.get();
 726 }
 727
 728 MediaFileSystemRegistry* BrowserProcessImpl::media_file_system_registry() {
 729 #if defined(ENABLE_EXTENSIONS)
 730   if (!media_file_system_registry_)
 731     media_file_system_registry_.reset(new MediaFileSystemRegistry());
 732   return media_file_system_registry_.get();
 733 #else
 734   return NULL;
 735 #endif
 736 }
 737
 738 bool BrowserProcessImpl::created_local_state() const {
 739   return created_local_state_;
 740 }
 741
 742 #if defined(ENABLE_WEBRTC)
 743 WebRtcLogUploader* BrowserProcessImpl::webrtc_log_uploader() {
 744   if (!webrtc_log_uploader_.get())
 745     webrtc_log_uploader_.reset(new WebRtcLogUploader());
 746   return webrtc_log_uploader_.get();
 747 }
 748 #endif
 749
 750 network_time::NetworkTimeTracker* BrowserProcessImpl::network_time_tracker() {
 751   if (!network_time_tracker_) {
 752     network_time_tracker_.reset(new network_time::NetworkTimeTracker(
 753         scoped_ptr<base::TickClock>(new base::DefaultTickClock()),
 754         local_state()));
 755   }
 756   return network_time_tracker_.get();
 757 }
 758
 759 gcm::GCMDriver* BrowserProcessImpl::gcm_driver() {
 760   DCHECK(CalledOnValidThread());
 761   if (!gcm_driver_)
 762     CreateGCMDriver();
 763   return gcm_driver_.get();
 764 }
 765
 766 // static
 767 void BrowserProcessImpl::RegisterPrefs(PrefRegistrySimple* registry) {
 768   registry->RegisterBooleanPref(prefs::kDefaultBrowserSettingEnabled,
 769                                 false);
 770   // This policy needs to be defined before the net subsystem is initialized,
 771   // so we do it here.
 772   registry->RegisterIntegerPref(prefs::kMaxConnectionsPerProxy,
 773                                 net::kDefaultMaxSocketsPerProxyServer);
 774
 775   registry->RegisterBooleanPref(prefs::kAllowCrossOriginAuthPrompt, false);
 776
 777   registry->RegisterBooleanPref(prefs::kBrowserGuestModeEnabled, true);
 778
 779 #if defined(OS_CHROMEOS) || defined(OS_ANDROID) || defined(OS_IOS)
 780   registry->RegisterBooleanPref(prefs::kEulaAccepted, false);
 781 #endif  // defined(OS_CHROMEOS) || defined(OS_ANDROID) || defined(OS_IOS)
 782 #if defined(OS_WIN)
 783   if (base::win::GetVersion() >= base::win::VERSION_WIN8) {
 784     registry->RegisterStringPref(prefs::kRelaunchMode,
 785                                  upgrade_util::kRelaunchModeDefault);
 786   }
 787 #endif
 788
 789   // TODO(brettw,*): this comment about ResourceBundle was here since
 790   // initial commit.  This comment seems unrelated, bit-rotten and
 791   // a candidate for removal.
 792   // Initialize ResourceBundle which handles files loaded from external
 793   // sources. This has to be done before uninstall code path and before prefs
 794   // are registered.
 795   registry->RegisterStringPref(prefs::kApplicationLocale, std::string());
 796 #if defined(OS_CHROMEOS)
 797   registry->RegisterStringPref(prefs::kOwnerLocale, std::string());
 798   registry->RegisterStringPref(prefs::kHardwareKeyboardLayout,
 799                                std::string());
 800 #endif  // defined(OS_CHROMEOS)
 801 #if !defined(OS_CHROMEOS)
 802   registry->RegisterBooleanPref(
 803       prefs::kMetricsReportingEnabled,
 804       GoogleUpdateSettings::GetCollectStatsConsent());
 805 #endif  // !defined(OS_CHROMEOS)
 806
 807 #if defined(OS_ANDROID)
 808   registry->RegisterBooleanPref(
 809       prefs::kCrashReportingEnabled, false);
 810 #endif  // defined(OS_ANDROID)
 811 }
 812
 813 DownloadRequestLimiter* BrowserProcessImpl::download_request_limiter() {
 814   DCHECK(CalledOnValidThread());
 815   if (!download_request_limiter_.get())
 816     download_request_limiter_ = new DownloadRequestLimiter();
 817   return download_request_limiter_.get();
 818 }
 819
 820 BackgroundModeManager* BrowserProcessImpl::background_mode_manager() {
 821   DCHECK(CalledOnValidThread());
 822 #if defined(ENABLE_BACKGROUND)
 823   if (!background_mode_manager_.get())
 824     CreateBackgroundModeManager();
 825   return background_mode_manager_.get();
 826 #else
 827   NOTIMPLEMENTED();
 828   return NULL;
 829 #endif
 830 }
 831
 832 void BrowserProcessImpl::set_background_mode_manager_for_test(
 833     scoped_ptr<BackgroundModeManager> manager) {
 834   background_mode_manager_ = manager.Pass();
 835 }
 836
 837 StatusTray* BrowserProcessImpl::status_tray() {
 838   DCHECK(CalledOnValidThread());
 839   if (!status_tray_.get())
 840     CreateStatusTray();
 841   return status_tray_.get();
 842 }
 843
 844
 845 SafeBrowsingService* BrowserProcessImpl::safe_browsing_service() {
 846   DCHECK(CalledOnValidThread());
 847   if (!created_safe_browsing_service_)
 848     CreateSafeBrowsingService();
 849   return safe_browsing_service_.get();
 850 }
 851
 852 safe_browsing::ClientSideDetectionService*
 853     BrowserProcessImpl::safe_browsing_detection_service() {
 854   DCHECK(CalledOnValidThread());
 855   if (safe_browsing_service())
 856     return safe_browsing_service()->safe_browsing_detection_service();
 857   return NULL;
 858 }
 859
 860 #if (defined(OS_WIN) || defined(OS_LINUX)) && !defined(OS_CHROMEOS)
 861 void BrowserProcessImpl::StartAutoupdateTimer() {
 862   autoupdate_timer_.Start(FROM_HERE,
 863       base::TimeDelta::FromHours(kUpdateCheckIntervalHours),
 864       this,
 865       &BrowserProcessImpl::OnAutoupdateTimer);
 866 }
 867 #endif
 868
 869 ChromeNetLog* BrowserProcessImpl::net_log() {
 870   return net_log_.get();
 871 }
 872
 873 prerender::PrerenderTracker* BrowserProcessImpl::prerender_tracker() {
 874   if (!prerender_tracker_.get())
 875     prerender_tracker_.reset(new prerender::PrerenderTracker);
 876
 877   return prerender_tracker_.get();
 878 }
 879
 880 component_updater::ComponentUpdateService*
 881 BrowserProcessImpl::component_updater() {
 882   if (!component_updater_.get()) {
 883     if (!BrowserThread::CurrentlyOn(BrowserThread::UI))
 884       return NULL;
 885     component_updater::Configurator* configurator =
 886         component_updater::MakeChromeComponentUpdaterConfigurator(
 887             CommandLine::ForCurrentProcess(),
 888             io_thread()->system_url_request_context_getter());
 889     // Creating the component updater does not do anything, components
 890     // need to be registered and Start() needs to be called.
 891     component_updater_.reset(ComponentUpdateServiceFactory(configurator));
 892   }
 893   return component_updater_.get();
 894 }
 895
 896 CRLSetFetcher* BrowserProcessImpl::crl_set_fetcher() {
 897   if (!crl_set_fetcher_.get())
 898     crl_set_fetcher_ = new CRLSetFetcher();
 899   return crl_set_fetcher_.get();
 900 }
 901
 902 component_updater::PnaclComponentInstaller*
 903 BrowserProcessImpl::pnacl_component_installer() {
 904   if (!pnacl_component_installer_.get()) {
 905     pnacl_component_installer_.reset(
 906         new component_updater::PnaclComponentInstaller());
 907   }
 908   return pnacl_component_installer_.get();
 909 }
 910
 911 void BrowserProcessImpl::ResourceDispatcherHostCreated() {
 912   resource_dispatcher_host_delegate_.reset(
 913       new ChromeResourceDispatcherHostDelegate(prerender_tracker()));
 914   ResourceDispatcherHost::Get()->SetDelegate(
 915       resource_dispatcher_host_delegate_.get());
 916
 917   pref_change_registrar_.Add(
 918       prefs::kAllowCrossOriginAuthPrompt,
 919       base::Bind(&BrowserProcessImpl::ApplyAllowCrossOriginAuthPromptPolicy,
 920                  base::Unretained(this)));
 921   ApplyAllowCrossOriginAuthPromptPolicy();
 922 }
 923
 924 void BrowserProcessImpl::CreateWatchdogThread() {
 925   DCHECK(!created_watchdog_thread_ && watchdog_thread_.get() == NULL);
 926   created_watchdog_thread_ = true;
 927
 928   scoped_ptr<WatchDogThread> thread(new WatchDogThread());
 929   base::Thread::Options options;
 930   options.timer_slack = base::TIMER_SLACK_MAXIMUM;
 931   if (!thread->StartWithOptions(options))
 932     return;
 933   watchdog_thread_.swap(thread);
 934 }
 935
 936 void BrowserProcessImpl::CreateProfileManager() {
 937   DCHECK(!created_profile_manager_ && profile_manager_.get() == NULL);
 938   created_profile_manager_ = true;
 939
 940   base::FilePath user_data_dir;
 941   PathService::Get(chrome::DIR_USER_DATA, &user_data_dir);
 942   profile_manager_.reset(new ProfileManager(user_data_dir));
 943 }
 944
 945 void BrowserProcessImpl::CreateLocalState() {
 946   DCHECK(!created_local_state_ && local_state_.get() == NULL);
 947   created_local_state_ = true;
 948
 949   base::FilePath local_state_path;
 950   CHECK(PathService::Get(chrome::FILE_LOCAL_STATE, &local_state_path));
 951   scoped_refptr<PrefRegistrySimple> pref_registry = new PrefRegistrySimple;
 952
 953   // Register local state preferences.
 954   chrome::RegisterLocalState(pref_registry.get());
 955
 956   local_state_ =
 957       chrome_prefs::CreateLocalState(local_state_path,
 958                                      local_state_task_runner_.get(),
 959                                      policy_service(),
 960                                      pref_registry,
 961                                      false).Pass();
 962
 963   pref_change_registrar_.Init(local_state_.get());
 964
 965   // Initialize the notification for the default browser setting policy.
 966   pref_change_registrar_.Add(
 967       prefs::kDefaultBrowserSettingEnabled,
 968       base::Bind(&BrowserProcessImpl::ApplyDefaultBrowserPolicy,
 969                  base::Unretained(this)));
 970
 971   // This preference must be kept in sync with external values; update them
 972   // whenever the preference or its controlling policy changes.
 973 #if !defined(OS_CHROMEOS) && !defined(OS_ANDROID) && !defined(OS_IOS)
 974   pref_change_registrar_.Add(
 975       prefs::kMetricsReportingEnabled,
 976       base::Bind(&BrowserProcessImpl::ApplyMetricsReportingPolicy,
 977                  base::Unretained(this)));
 978 #endif
 979
 980   int max_per_proxy = local_state_->GetInteger(prefs::kMaxConnectionsPerProxy);
 981   net::ClientSocketPoolManager::set_max_sockets_per_proxy_server(
 982       net::HttpNetworkSession::NORMAL_SOCKET_POOL,
 983       std::max(std::min(max_per_proxy, 99),
 984                net::ClientSocketPoolManager::max_sockets_per_group(
 985                    net::HttpNetworkSession::NORMAL_SOCKET_POOL)));
 986 }
 987
 988 void BrowserProcessImpl::PreCreateThreads() {
 989   io_thread_.reset(
 990       new IOThread(local_state(), policy_service(), net_log_.get(),
 991                    extension_event_router_forwarder()));
 992 }
 993
 994 void BrowserProcessImpl::PreMainMessageLoopRun() {
 995 #if defined(ENABLE_CONFIGURATION_POLICY)
 996   // browser_policy_connector() is created very early because local_state()
 997   // needs policy to be initialized with the managed preference values.
 998   // However, policy fetches from the network and loading of disk caches
 999   // requires that threads are running; this Init() call lets the connector
1000   // resume its initialization now that the loops are spinning and the
1001   // system request context is available for the fetchers.
1002   browser_policy_connector()->Init(local_state(), system_request_context());
1003 #endif
1004
1005   if (local_state_->IsManagedPreference(prefs::kDefaultBrowserSettingEnabled))
1006     ApplyDefaultBrowserPolicy();
1007
1008 #if !defined(OS_CHROMEOS) && !defined(OS_ANDROID) && !defined(OS_IOS)
1009   ApplyMetricsReportingPolicy();
1010 #endif
1011
1012 #if defined(ENABLE_PLUGINS)
1013   PluginService* plugin_service = PluginService::GetInstance();
1014   plugin_service->SetFilter(ChromePluginServiceFilter::GetInstance());
1015   plugin_service->StartWatchingPlugins();
1016
1017 #if defined(OS_POSIX)
1018   // Also find plugins in a user-specific plugins dir,
1019   // e.g. ~/.config/chromium/Plugins.
1020   const CommandLine& cmd_line = *CommandLine::ForCurrentProcess();
1021   if (!cmd_line.HasSwitch(switches::kDisablePluginsDiscovery)) {
1022     base::FilePath user_data_dir;
1023     if (PathService::Get(chrome::DIR_USER_DATA, &user_data_dir))
1024       plugin_service->AddExtraPluginDir(user_data_dir.Append("Plugins"));
1025   }
1026 #endif
1027
1028   // Triggers initialization of the singleton instance on UI thread.
1029   PluginFinder::GetInstance()->Init();
1030
1031 #if defined(ENABLE_PLUGIN_INSTALLATION)
1032   DCHECK(!plugins_resource_service_.get());
1033   plugins_resource_service_ = new PluginsResourceService(local_state());
1034   plugins_resource_service_->Init();
1035 #endif
1036 #endif  // defined(ENABLE_PLUGINS)
1037
1038   const CommandLine& command_line = *CommandLine::ForCurrentProcess();
1039   if (!command_line.HasSwitch(switches::kDisableWebResources)) {
1040     DCHECK(!promo_resource_service_.get());
1041     promo_resource_service_ = new PromoResourceService;
1042     promo_resource_service_->StartAfterDelay();
1043   }
1044
1045 #if !defined(OS_ANDROID) && !defined(OS_IOS)
1046   storage_monitor::StorageMonitor::Create();
1047 #endif
1048
1049   platform_part_->PreMainMessageLoopRun();
1050 }
1051
1052 void BrowserProcessImpl::CreateIconManager() {
1053   DCHECK(!created_icon_manager_ && icon_manager_.get() == NULL);
1054   created_icon_manager_ = true;
1055   icon_manager_.reset(new IconManager);
1056 }
1057
1058 void BrowserProcessImpl::CreateIntranetRedirectDetector() {
1059   DCHECK(intranet_redirect_detector_.get() == NULL);
1060   scoped_ptr<IntranetRedirectDetector> intranet_redirect_detector(
1061       new IntranetRedirectDetector);
1062   intranet_redirect_detector_.swap(intranet_redirect_detector);
1063 }
1064
1065 void BrowserProcessImpl::CreateNotificationUIManager() {
1066 #if defined(ENABLE_NOTIFICATIONS)
1067   DCHECK(notification_ui_manager_.get() == NULL);
1068   notification_ui_manager_.reset(NotificationUIManager::Create(local_state()));
1069   created_notification_ui_manager_ = true;
1070 #endif
1071 }
1072
1073 void BrowserProcessImpl::CreateBackgroundModeManager() {
1074   DCHECK(background_mode_manager_.get() == NULL);
1075   background_mode_manager_.reset(
1076       new BackgroundModeManager(CommandLine::ForCurrentProcess(),
1077                                 &profile_manager()->GetProfileInfoCache()));
1078 }
1079
1080 void BrowserProcessImpl::CreateStatusTray() {
1081   DCHECK(status_tray_.get() == NULL);
1082   status_tray_.reset(StatusTray::Create());
1083 }
1084
1085 void BrowserProcessImpl::CreatePrintPreviewDialogController() {
1086 #if defined(ENABLE_FULL_PRINTING)
1087   DCHECK(print_preview_dialog_controller_.get() == NULL);
1088   print_preview_dialog_controller_ =
1089       new printing::PrintPreviewDialogController();
1090 #else
1091   NOTIMPLEMENTED();
1092 #endif
1093 }
1094
1095 void BrowserProcessImpl::CreateBackgroundPrintingManager() {
1096 #if defined(ENABLE_FULL_PRINTING)
1097   DCHECK(background_printing_manager_.get() == NULL);
1098   background_printing_manager_.reset(new printing::BackgroundPrintingManager());
1099 #else
1100   NOTIMPLEMENTED();
1101 #endif
1102 }
1103
1104 void BrowserProcessImpl::CreateSafeBrowsingService() {
1105   DCHECK(safe_browsing_service_.get() == NULL);
1106   // Set this flag to true so that we don't retry indefinitely to
1107   // create the service class if there was an error.
1108   created_safe_browsing_service_ = true;
1109 #if defined(FULL_SAFE_BROWSING) || defined(MOBILE_SAFE_BROWSING)
1110   safe_browsing_service_ = SafeBrowsingService::CreateSafeBrowsingService();
1111   safe_browsing_service_->Initialize();
1112 #endif
1113 }
1114
1115 void BrowserProcessImpl::CreateGCMDriver() {
1116   DCHECK(!gcm_driver_);
1117
1118 #if defined(OS_ANDROID)
1119   gcm_driver_.reset(new gcm::GCMDriverAndroid);
1120 #else
1121   base::FilePath store_path;
1122   CHECK(PathService::Get(chrome::DIR_GLOBAL_GCM_STORE, &store_path));
1123   gcm_driver_ = gcm::CreateGCMDriverDesktop(
1124       make_scoped_ptr(new gcm::GCMClientFactory),
1125       store_path,
1126       system_request_context());
1127   // Sign-in is not required for device-level GCM usage. So we just call
1128   // OnSignedIn to assume always signed-in. Note that GCM will not be started
1129   // at this point since no one has asked for it yet.
1130   // TODO(jianli): To be removed when sign-in enforcement is dropped.
1131   gcm_driver_->OnSignedIn();
1132 #endif  // defined(OS_ANDROID)
1133 }
1134
1135 void BrowserProcessImpl::ApplyDefaultBrowserPolicy() {
1136   if (local_state()->GetBoolean(prefs::kDefaultBrowserSettingEnabled)) {
1137     scoped_refptr<ShellIntegration::DefaultWebClientWorker>
1138         set_browser_worker = new ShellIntegration::DefaultBrowserWorker(NULL);
1139     set_browser_worker->StartSetAsDefault();
1140   }
1141 }
1142
1143 void BrowserProcessImpl::ApplyAllowCrossOriginAuthPromptPolicy() {
1144   bool value = local_state()->GetBoolean(prefs::kAllowCrossOriginAuthPrompt);
1145   ResourceDispatcherHost::Get()->SetAllowCrossOriginAuthPrompt(value);
1146 }
1147
1148 void BrowserProcessImpl::ApplyMetricsReportingPolicy() {
1149 #if !defined(OS_CHROMEOS) && !defined(OS_ANDROID) && !defined(OS_IOS)
1150   CHECK(BrowserThread::PostTask(
1151       BrowserThread::FILE, FROM_HERE,
1152       base::Bind(
1153           base::IgnoreResult(&GoogleUpdateSettings::SetCollectStatsConsent),
1154           local_state()->GetBoolean(prefs::kMetricsReportingEnabled))));
1155 #endif
1156 }
1157
1158 // Mac is currently not supported.
1159 #if (defined(OS_WIN) || defined(OS_LINUX)) && !defined(OS_CHROMEOS)
1160
1161 bool BrowserProcessImpl::CanAutorestartForUpdate() const {
1162   // Check if browser is in the background and if it needs to be restarted to
1163   // apply a pending update.
1164   return chrome::GetTotalBrowserCount() == 0 && chrome::WillKeepAlive() &&
1165          upgrade_util::IsUpdatePendingRestart();
1166 }
1167
1168 // Switches to add when auto-restarting Chrome.
1169 const char* const kSwitchesToAddOnAutorestart[] = {
1170   switches::kNoStartupWindow
1171 };
1172
1173 void BrowserProcessImpl::RestartBackgroundInstance() {
1174   CommandLine* old_cl = CommandLine::ForCurrentProcess();
1175   scoped_ptr<CommandLine> new_cl(new CommandLine(old_cl->GetProgram()));
1176
1177   std::map<std::string, CommandLine::StringType> switches =
1178       old_cl->GetSwitches();
1179
1180   switches::RemoveSwitchesForAutostart(&switches);
1181
1182   // Append the rest of the switches (along with their values, if any)
1183   // to the new command line
1184   for (std::map<std::string, CommandLine::StringType>::const_iterator i =
1185       switches.begin(); i != switches.end(); ++i) {
1186       CommandLine::StringType switch_value = i->second;
1187       if (switch_value.length() > 0) {
1188         new_cl->AppendSwitchNative(i->first, i->second);
1189       } else {
1190         new_cl->AppendSwitch(i->first);
1191       }
1192   }
1193
1194   // Ensure that our desired switches are set on the new process.
1195   for (size_t i = 0; i < arraysize(kSwitchesToAddOnAutorestart); ++i) {
1196     if (!new_cl->HasSwitch(kSwitchesToAddOnAutorestart[i]))
1197       new_cl->AppendSwitch(kSwitchesToAddOnAutorestart[i]);
1198   }
1199
1200   DLOG(WARNING) << "Shutting down current instance of the browser.";
1201   chrome::AttemptExit();
1202
1203   // Transfer ownership to Upgrade.
1204   upgrade_util::SetNewCommandLine(new_cl.release());
1205 }
1206
1207 void BrowserProcessImpl::OnAutoupdateTimer() {
1208   if (CanAutorestartForUpdate()) {
1209     DLOG(WARNING) << "Detected update.  Restarting browser.";
1210     RestartBackgroundInstance();
1211   }
1212 }
1213
1214 #endif  // (defined(OS_WIN) || defined(OS_LINUX)) && !defined(OS_CHROMEOS)