content/browser/browser_main_loop.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 "content/browser/browser_main_loop.h"
   6
   7 #include "base/bind.h"
   8 #include "base/command_line.h"
   9 #include "base/debug/trace_event.h"
  10 #include "base/file_util.h"
  11 #include "base/logging.h"
  12 #include "base/message_loop/message_loop.h"
  13 #include "base/metrics/field_trial.h"
  14 #include "base/metrics/histogram.h"
  15 #include "base/path_service.h"
  16 #include "base/pending_task.h"
  17 #include "base/power_monitor/power_monitor.h"
  18 #include "base/power_monitor/power_monitor_device_source.h"
  19 #include "base/process/process_metrics.h"
  20 #include "base/run_loop.h"
  21 #include "base/strings/string_number_conversions.h"
  22 #include "base/system_monitor/system_monitor.h"
  23 #include "base/thread_task_runner_handle.h"
  24 #include "base/threading/thread_restrictions.h"
  25 #include "base/timer/hi_res_timer_manager.h"
  26 #include "content/browser/battery_status/battery_status_service.h"
  27 #include "content/browser/browser_thread_impl.h"
  28 #include "content/browser/device_sensors/device_inertial_sensor_service.h"
  29 #include "content/browser/download/save_file_manager.h"
  30 #include "content/browser/gamepad/gamepad_service.h"
  31 #include "content/browser/gpu/browser_gpu_channel_host_factory.h"
  32 #include "content/browser/gpu/compositor_util.h"
  33 #include "content/browser/gpu/gpu_data_manager_impl.h"
  34 #include "content/browser/gpu/gpu_process_host.h"
  35 #include "content/browser/gpu/gpu_process_host_ui_shim.h"
  36 #include "content/browser/histogram_synchronizer.h"
  37 #include "content/browser/loader/resource_dispatcher_host_impl.h"
  38 #include "content/browser/media/capture/audio_mirroring_manager.h"
  39 #include "content/browser/media/media_internals.h"
  40 #include "content/browser/net/browser_online_state_observer.h"
  41 #include "content/browser/plugin_service_impl.h"
  42 #include "content/browser/renderer_host/media/media_stream_manager.h"
  43 #include "content/browser/speech/speech_recognition_manager_impl.h"
  44 #include "content/browser/startup_task_runner.h"
  45 #include "content/browser/time_zone_monitor.h"
  46 #include "content/browser/webui/content_web_ui_controller_factory.h"
  47 #include "content/browser/webui/url_data_manager.h"
  48 #include "content/public/browser/browser_main_parts.h"
  49 #include "content/public/browser/browser_shutdown.h"
  50 #include "content/public/browser/content_browser_client.h"
  51 #include "content/public/browser/render_process_host.h"
  52 #include "content/public/browser/tracing_controller.h"
  53 #include "content/public/common/content_switches.h"
  54 #include "content/public/common/main_function_params.h"
  55 #include "content/public/common/result_codes.h"
  56 #include "crypto/nss_util.h"
  57 #include "media/audio/audio_manager.h"
  58 #include "media/base/media.h"
  59 #include "media/base/user_input_monitor.h"
  60 #include "media/midi/midi_manager.h"
  61 #include "net/base/network_change_notifier.h"
  62 #include "net/socket/client_socket_factory.h"
  63 #include "net/ssl/ssl_config_service.h"
  64 #include "ui/base/clipboard/clipboard.h"
  65
  66 #if defined(USE_AURA) || (defined(OS_MACOSX) && !defined(OS_IOS))
  67 #include "content/browser/compositor/image_transport_factory.h"
  68 #endif
  69
  70 #if defined(USE_AURA)
  71 #include "content/public/browser/context_factory.h"
  72 #include "ui/aura/env.h"
  73 #endif
  74
  75 #if !defined(OS_IOS)
  76 #include "content/browser/renderer_host/render_process_host_impl.h"
  77 #endif
  78
  79 #if defined(OS_ANDROID)
  80 #include "base/android/jni_android.h"
  81 #include "content/browser/android/browser_startup_controller.h"
  82 #include "content/browser/android/surface_texture_peer_browser_impl.h"
  83 #include "content/browser/android/tracing_controller_android.h"
  84 #include "ui/gl/gl_surface.h"
  85 #endif
  86
  87 #if defined(OS_MACOSX) && !defined(OS_IOS)
  88 #include "content/browser/theme_helper_mac.h"
  89 #endif
  90
  91 #if defined(OS_WIN)
  92 #include <windows.h>
  93 #include <commctrl.h>
  94 #include <shellapi.h>
  95
  96 #include "content/browser/system_message_window_win.h"
  97 #include "content/common/sandbox_win.h"
  98 #include "net/base/winsock_init.h"
  99 #include "ui/base/l10n/l10n_util_win.h"
 100 #endif
 101
 102 #if defined(USE_GLIB)
 103 #include <glib-object.h>
 104 #endif
 105
 106 #if defined(OS_LINUX) && defined(USE_UDEV)
 107 #include "content/browser/device_monitor_udev.h"
 108 #elif defined(OS_MACOSX) && !defined(OS_IOS)
 109 #include "content/browser/device_monitor_mac.h"
 110 #endif
 111
 112 #if defined(OS_POSIX) && !defined(OS_MACOSX)
 113 #include "content/browser/renderer_host/render_sandbox_host_linux.h"
 114 #include "content/browser/zygote_host/zygote_host_impl_linux.h"
 115 #include "sandbox/linux/suid/client/setuid_sandbox_client.h"
 116 #endif
 117
 118 #if defined(TCMALLOC_TRACE_MEMORY_SUPPORTED)
 119 #include "third_party/tcmalloc/chromium/src/gperftools/heap-profiler.h"
 120 #endif
 121
 122 #if defined(USE_X11)
 123 #include "ui/gfx/x/x11_connection.h"
 124 #include "ui/gfx/x/x11_types.h"
 125 #endif
 126
 127 // One of the linux specific headers defines this as a macro.
 128 #ifdef DestroyAll
 129 #undef DestroyAll
 130 #endif
 131
 132 namespace content {
 133 namespace {
 134
 135 #if defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
 136 void SetupSandbox(const CommandLine& parsed_command_line) {
 137   TRACE_EVENT0("startup", "SetupSandbox");
 138   base::FilePath sandbox_binary;
 139
 140   scoped_ptr<sandbox::SetuidSandboxClient> setuid_sandbox_client(
 141       sandbox::SetuidSandboxClient::Create());
 142
 143   const bool want_setuid_sandbox =
 144       !parsed_command_line.HasSwitch(switches::kNoSandbox) &&
 145       !parsed_command_line.HasSwitch(switches::kDisableSetuidSandbox) &&
 146       !setuid_sandbox_client->IsDisabledViaEnvironment();
 147
 148   static const char no_suid_error[] =
 149       "Running without the SUID sandbox! See "
 150       "https://code.google.com/p/chromium/wiki/LinuxSUIDSandboxDevelopment "
 151       "for more information on developing with the sandbox on.";
 152   if (want_setuid_sandbox) {
 153     sandbox_binary = setuid_sandbox_client->GetSandboxBinaryPath();
 154     if (sandbox_binary.empty()) {
 155       // This needs to be fatal. Talk to security@chromium.org if you feel
 156       // otherwise.
 157       LOG(FATAL) << no_suid_error;
 158     }
 159   } else {
 160     LOG(ERROR) << no_suid_error;
 161   }
 162
 163   // Tickle the sandbox host and zygote host so they fork now.
 164   RenderSandboxHostLinux::GetInstance()->Init();
 165   ZygoteHostImpl::GetInstance()->Init(sandbox_binary.value());
 166 }
 167 #endif
 168
 169 #if defined(USE_GLIB)
 170 static void GLibLogHandler(const gchar* log_domain,
 171                            GLogLevelFlags log_level,
 172                            const gchar* message,
 173                            gpointer userdata) {
 174   if (!log_domain)
 175     log_domain = "<unknown>";
 176   if (!message)
 177     message = "<no message>";
 178
 179   if (strstr(message, "Unable to retrieve the file info for")) {
 180     LOG(ERROR) << "GTK File code error: " << message;
 181   } else if (strstr(message, "Could not find the icon") &&
 182              strstr(log_domain, "Gtk")) {
 183     LOG(ERROR) << "GTK icon error: " << message;
 184   } else if (strstr(message, "Theme file for default has no") ||
 185              strstr(message, "Theme directory") ||
 186              strstr(message, "theme pixmap") ||
 187              strstr(message, "locate theme engine")) {
 188     LOG(ERROR) << "GTK theme error: " << message;
 189   } else if (strstr(message, "Unable to create Ubuntu Menu Proxy") &&
 190              strstr(log_domain, "<unknown>")) {
 191     LOG(ERROR) << "GTK menu proxy create failed";
 192   } else if (strstr(message, "Out of memory") &&
 193              strstr(log_domain, "<unknown>")) {
 194     LOG(ERROR) << "DBus call timeout or out of memory: "
 195                << "http://crosbug.com/15496";
 196   } else if (strstr(message, "Could not connect: Connection refused") &&
 197              strstr(log_domain, "<unknown>")) {
 198     LOG(ERROR) << "DConf settings backend could not connect to session bus: "
 199                << "http://crbug.com/179797";
 200   } else if (strstr(message, "Attempting to store changes into") ||
 201              strstr(message, "Attempting to set the permissions of")) {
 202     LOG(ERROR) << message << " (http://bugs.chromium.org/161366)";
 203   } else if (strstr(message, "drawable is not a native X11 window")) {
 204     LOG(ERROR) << message << " (http://bugs.chromium.org/329991)";
 205   } else {
 206     LOG(DFATAL) << log_domain << ": " << message;
 207   }
 208 }
 209
 210 static void SetUpGLibLogHandler() {
 211   // Register GLib-handled assertions to go through our logging system.
 212   const char* kLogDomains[] = { NULL, "Gtk", "Gdk", "GLib", "GLib-GObject" };
 213   for (size_t i = 0; i < arraysize(kLogDomains); i++) {
 214     g_log_set_handler(kLogDomains[i],
 215                       static_cast<GLogLevelFlags>(G_LOG_FLAG_RECURSION |
 216                                                   G_LOG_FLAG_FATAL |
 217                                                   G_LOG_LEVEL_ERROR |
 218                                                   G_LOG_LEVEL_CRITICAL |
 219                                                   G_LOG_LEVEL_WARNING),
 220                       GLibLogHandler,
 221                       NULL);
 222   }
 223 }
 224 #endif
 225
 226 void OnStoppedStartupTracing(const base::FilePath& trace_file) {
 227   VLOG(0) << "Completed startup tracing to " << trace_file.value();
 228 }
 229
 230 #if defined(USE_AURA)
 231 bool ShouldInitializeBrowserGpuChannelAndTransportSurface() {
 232   return true;
 233 }
 234 #elif defined(OS_MACOSX) && !defined(OS_IOS)
 235 bool ShouldInitializeBrowserGpuChannelAndTransportSurface() {
 236   return IsDelegatedRendererEnabled();
 237 }
 238 #endif
 239
 240 }  // namespace
 241
 242 // The currently-running BrowserMainLoop.  There can be one or zero.
 243 BrowserMainLoop* g_current_browser_main_loop = NULL;
 244
 245 // This is just to be able to keep ShutdownThreadsAndCleanUp out of
 246 // the public interface of BrowserMainLoop.
 247 class BrowserShutdownImpl {
 248  public:
 249   static void ImmediateShutdownAndExitProcess() {
 250     DCHECK(g_current_browser_main_loop);
 251     g_current_browser_main_loop->ShutdownThreadsAndCleanUp();
 252
 253 #if defined(OS_WIN)
 254     // At this point the message loop is still running yet we've shut everything
 255     // down. If any messages are processed we'll likely crash. Exit now.
 256     ExitProcess(RESULT_CODE_NORMAL_EXIT);
 257 #elif defined(OS_POSIX) && !defined(OS_MACOSX)
 258     _exit(RESULT_CODE_NORMAL_EXIT);
 259 #else
 260     NOTIMPLEMENTED();
 261 #endif
 262   }
 263 };
 264
 265 void ImmediateShutdownAndExitProcess() {
 266   BrowserShutdownImpl::ImmediateShutdownAndExitProcess();
 267 }
 268
 269 // For measuring memory usage after each task. Behind a command line flag.
 270 class BrowserMainLoop::MemoryObserver : public base::MessageLoop::TaskObserver {
 271  public:
 272   MemoryObserver() {}
 273   virtual ~MemoryObserver() {}
 274
 275   virtual void WillProcessTask(const base::PendingTask& pending_task) OVERRIDE {
 276   }
 277
 278   virtual void DidProcessTask(const base::PendingTask& pending_task) OVERRIDE {
 279 #if !defined(OS_IOS)  // No ProcessMetrics on IOS.
 280     scoped_ptr<base::ProcessMetrics> process_metrics(
 281         base::ProcessMetrics::CreateProcessMetrics(
 282 #if defined(OS_MACOSX)
 283             base::GetCurrentProcessHandle(), NULL));
 284 #else
 285             base::GetCurrentProcessHandle()));
 286 #endif
 287     size_t private_bytes;
 288     process_metrics->GetMemoryBytes(&private_bytes, NULL);
 289     HISTOGRAM_MEMORY_KB("Memory.BrowserUsed", private_bytes >> 10);
 290 #endif
 291   }
 292  private:
 293   DISALLOW_COPY_AND_ASSIGN(MemoryObserver);
 294 };
 295
 296
 297 // BrowserMainLoop construction / destruction =============================
 298
 299 BrowserMainLoop* BrowserMainLoop::GetInstance() {
 300   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 301   return g_current_browser_main_loop;
 302 }
 303
 304 BrowserMainLoop::BrowserMainLoop(const MainFunctionParams& parameters)
 305     : parameters_(parameters),
 306       parsed_command_line_(parameters.command_line),
 307       result_code_(RESULT_CODE_NORMAL_EXIT),
 308       created_threads_(false),
 309       // ContentMainRunner should have enabled tracing of the browser process
 310       // when kTraceStartup is in the command line.
 311       is_tracing_startup_(
 312           parameters.command_line.HasSwitch(switches::kTraceStartup)) {
 313   DCHECK(!g_current_browser_main_loop);
 314   g_current_browser_main_loop = this;
 315 }
 316
 317 BrowserMainLoop::~BrowserMainLoop() {
 318   DCHECK_EQ(this, g_current_browser_main_loop);
 319 #if !defined(OS_IOS)
 320   ui::Clipboard::DestroyClipboardForCurrentThread();
 321 #endif  // !defined(OS_IOS)
 322   g_current_browser_main_loop = NULL;
 323 }
 324
 325 void BrowserMainLoop::Init() {
 326   TRACE_EVENT0("startup", "BrowserMainLoop::Init");
 327   parts_.reset(
 328       GetContentClient()->browser()->CreateBrowserMainParts(parameters_));
 329 }
 330
 331 // BrowserMainLoop stages ==================================================
 332
 333 void BrowserMainLoop::EarlyInitialization() {
 334   TRACE_EVENT0("startup", "BrowserMainLoop::EarlyInitialization");
 335
 336 #if defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
 337   // No thread should be created before this call, as SetupSandbox()
 338   // will end-up using fork().
 339   SetupSandbox(parsed_command_line_);
 340 #endif
 341
 342 #if defined(USE_X11)
 343   if (parsed_command_line_.HasSwitch(switches::kSingleProcess) ||
 344       parsed_command_line_.HasSwitch(switches::kInProcessGPU)) {
 345     if (!gfx::InitializeThreadedX11()) {
 346       LOG(ERROR) << "Failed to put Xlib into threaded mode.";
 347     }
 348   }
 349 #endif
 350
 351   // GLib's spawning of new processes is buggy, so it's important that at this
 352   // point GLib does not need to start DBUS. Chrome should always start with
 353   // DBUS_SESSION_BUS_ADDRESS properly set. See crbug.com/309093.
 354 #if defined(USE_GLIB)
 355   // g_type_init will be deprecated in 2.36. 2.35 is the development
 356   // version for 2.36, hence do not call g_type_init starting 2.35.
 357   // http://developer.gnome.org/gobject/unstable/gobject-Type-Information.html#g-type-init
 358 #if !GLIB_CHECK_VERSION(2, 35, 0)
 359   // GLib type system initialization. Needed at least for gconf,
 360   // used in net/proxy/proxy_config_service_linux.cc. Most likely
 361   // this is superfluous as gtk_init() ought to do this. It's
 362   // definitely harmless, so retained as a reminder of this
 363   // requirement for gconf.
 364   g_type_init();
 365 #endif
 366
 367   SetUpGLibLogHandler();
 368 #endif
 369
 370   if (parts_)
 371     parts_->PreEarlyInitialization();
 372
 373 #if defined(OS_MACOSX)
 374   // We use quite a few file descriptors for our IPC, and the default limit on
 375   // the Mac is low (256), so bump it up.
 376   base::SetFdLimit(1024);
 377 #endif
 378
 379 #if defined(OS_WIN)
 380   net::EnsureWinsockInit();
 381 #endif
 382
 383 #if !defined(USE_OPENSSL)
 384   // We want to be sure to init NSPR on the main thread.
 385   crypto::EnsureNSPRInit();
 386 #endif  // !defined(USE_OPENSSL)
 387
 388 #if !defined(OS_IOS)
 389   if (parsed_command_line_.HasSwitch(switches::kRendererProcessLimit)) {
 390     std::string limit_string = parsed_command_line_.GetSwitchValueASCII(
 391         switches::kRendererProcessLimit);
 392     size_t process_limit;
 393     if (base::StringToSizeT(limit_string, &process_limit)) {
 394       RenderProcessHost::SetMaxRendererProcessCount(process_limit);
 395     }
 396   }
 397 #endif  // !defined(OS_IOS)
 398
 399   if (parts_)
 400     parts_->PostEarlyInitialization();
 401 }
 402
 403 void BrowserMainLoop::MainMessageLoopStart() {
 404   TRACE_EVENT0("startup", "BrowserMainLoop::MainMessageLoopStart");
 405   if (parts_) {
 406     TRACE_EVENT0("startup",
 407         "BrowserMainLoop::MainMessageLoopStart:PreMainMessageLoopStart");
 408     parts_->PreMainMessageLoopStart();
 409   }
 410
 411 #if defined(OS_WIN)
 412   // If we're running tests (ui_task is non-null), then the ResourceBundle
 413   // has already been initialized.
 414   if (!parameters_.ui_task) {
 415     // Override the configured locale with the user's preferred UI language.
 416     l10n_util::OverrideLocaleWithUILanguageList();
 417   }
 418 #endif
 419
 420   // Create a MessageLoop if one does not already exist for the current thread.
 421   if (!base::MessageLoop::current())
 422     main_message_loop_.reset(new base::MessageLoopForUI);
 423
 424   InitializeMainThread();
 425
 426   {
 427     TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:SystemMonitor");
 428     system_monitor_.reset(new base::SystemMonitor);
 429   }
 430   {
 431     TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:PowerMonitor");
 432     scoped_ptr<base::PowerMonitorSource> power_monitor_source(
 433       new base::PowerMonitorDeviceSource());
 434     power_monitor_.reset(new base::PowerMonitor(power_monitor_source.Pass()));
 435   }
 436   {
 437     TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:HighResTimerManager");
 438     hi_res_timer_manager_.reset(new base::HighResolutionTimerManager);
 439   }
 440   {
 441     TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:NetworkChangeNotifier");
 442     network_change_notifier_.reset(net::NetworkChangeNotifier::Create());
 443   }
 444
 445 #if !defined(OS_IOS)
 446   {
 447     TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:MediaFeatures");
 448     media::InitializeCPUSpecificMediaFeatures();
 449   }
 450   {
 451     TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:AudioMan");
 452     audio_manager_.reset(media::AudioManager::Create(
 453         MediaInternals::GetInstance()));
 454   }
 455   {
 456     TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:MidiManager");
 457     midi_manager_.reset(media::MidiManager::Create());
 458   }
 459   {
 460     TRACE_EVENT0("startup",
 461                  "BrowserMainLoop::Subsystem:ContentWebUIController");
 462     WebUIControllerFactory::RegisterFactory(
 463         ContentWebUIControllerFactory::GetInstance());
 464   }
 465
 466   {
 467     TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:AudioMirroringManager");
 468     audio_mirroring_manager_.reset(new AudioMirroringManager());
 469   }
 470   {
 471     TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:OnlineStateObserver");
 472     online_state_observer_.reset(new BrowserOnlineStateObserver);
 473   }
 474
 475   {
 476     system_stats_monitor_.reset(new base::debug::TraceEventSystemStatsMonitor(
 477         base::ThreadTaskRunnerHandle::Get()));
 478   }
 479 #endif  // !defined(OS_IOS)
 480
 481 #if defined(OS_WIN)
 482   system_message_window_.reset(new SystemMessageWindowWin);
 483 #endif
 484
 485   if (parts_)
 486     parts_->PostMainMessageLoopStart();
 487
 488 #if !defined(OS_IOS)
 489   // Start tracing to a file if needed. Only do this after starting the main
 490   // message loop to avoid calling MessagePumpForUI::ScheduleWork() before
 491   // MessagePumpForUI::Start() as it will crash the browser.
 492   if (is_tracing_startup_) {
 493     TRACE_EVENT0("startup", "BrowserMainLoop::InitStartupTracing");
 494     InitStartupTracing(parsed_command_line_);
 495   }
 496 #endif  // !defined(OS_IOS)
 497
 498 #if defined(OS_ANDROID)
 499   {
 500     TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:SurfaceTexturePeer");
 501     SurfaceTexturePeer::InitInstance(new SurfaceTexturePeerBrowserImpl());
 502   }
 503 #endif
 504
 505   if (parsed_command_line_.HasSwitch(switches::kMemoryMetrics)) {
 506     TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:MemoryObserver");
 507     memory_observer_.reset(new MemoryObserver());
 508     base::MessageLoop::current()->AddTaskObserver(memory_observer_.get());
 509   }
 510
 511 #if defined(TCMALLOC_TRACE_MEMORY_SUPPORTED)
 512   trace_memory_controller_.reset(new base::debug::TraceMemoryController(
 513       base::MessageLoop::current()->message_loop_proxy(),
 514       ::HeapProfilerWithPseudoStackStart,
 515       ::HeapProfilerStop,
 516       ::GetHeapProfile));
 517 #endif
 518 }
 519
 520 int BrowserMainLoop::PreCreateThreads() {
 521
 522   if (parts_) {
 523     TRACE_EVENT0("startup",
 524         "BrowserMainLoop::CreateThreads:PreCreateThreads");
 525     result_code_ = parts_->PreCreateThreads();
 526   }
 527
 528 #if defined(ENABLE_PLUGINS)
 529   // Prior to any processing happening on the io thread, we create the
 530   // plugin service as it is predominantly used from the io thread,
 531   // but must be created on the main thread. The service ctor is
 532   // inexpensive and does not invoke the io_thread() accessor.
 533   {
 534     TRACE_EVENT0("startup", "BrowserMainLoop::CreateThreads:PluginService");
 535     PluginService::GetInstance()->Init();
 536   }
 537 #endif
 538
 539 #if !defined(OS_IOS) && (!defined(GOOGLE_CHROME_BUILD) || defined(OS_ANDROID))
 540   // Single-process is an unsupported and not fully tested mode, so
 541   // don't enable it for official Chrome builds (except on Android).
 542   if (parsed_command_line_.HasSwitch(switches::kSingleProcess))
 543     RenderProcessHost::SetRunRendererInProcess(true);
 544 #endif
 545   return result_code_;
 546 }
 547
 548 void BrowserMainLoop::CreateStartupTasks() {
 549   TRACE_EVENT0("startup", "BrowserMainLoop::CreateStartupTasks");
 550
 551   // First time through, we really want to create all the tasks
 552   if (!startup_task_runner_.get()) {
 553 #if defined(OS_ANDROID)
 554     startup_task_runner_ = make_scoped_ptr(new StartupTaskRunner(
 555         base::Bind(&BrowserStartupComplete),
 556         base::MessageLoop::current()->message_loop_proxy()));
 557 #else
 558     startup_task_runner_ = make_scoped_ptr(new StartupTaskRunner(
 559         base::Callback<void(int)>(),
 560         base::MessageLoop::current()->message_loop_proxy()));
 561 #endif
 562     StartupTask pre_create_threads =
 563         base::Bind(&BrowserMainLoop::PreCreateThreads, base::Unretained(this));
 564     startup_task_runner_->AddTask(pre_create_threads);
 565
 566     StartupTask create_threads =
 567         base::Bind(&BrowserMainLoop::CreateThreads, base::Unretained(this));
 568     startup_task_runner_->AddTask(create_threads);
 569
 570     StartupTask browser_thread_started = base::Bind(
 571         &BrowserMainLoop::BrowserThreadsStarted, base::Unretained(this));
 572     startup_task_runner_->AddTask(browser_thread_started);
 573
 574     StartupTask pre_main_message_loop_run = base::Bind(
 575         &BrowserMainLoop::PreMainMessageLoopRun, base::Unretained(this));
 576     startup_task_runner_->AddTask(pre_main_message_loop_run);
 577
 578 #if defined(OS_ANDROID)
 579     if (BrowserMayStartAsynchronously()) {
 580       startup_task_runner_->StartRunningTasksAsync();
 581     }
 582 #endif
 583   }
 584 #if defined(OS_ANDROID)
 585   if (!BrowserMayStartAsynchronously()) {
 586     // A second request for asynchronous startup can be ignored, so
 587     // StartupRunningTasksAsync is only called first time through. If, however,
 588     // this is a request for synchronous startup then it must override any
 589     // previous call for async startup, so we call RunAllTasksNow()
 590     // unconditionally.
 591     startup_task_runner_->RunAllTasksNow();
 592   }
 593 #else
 594   startup_task_runner_->RunAllTasksNow();
 595 #endif
 596 }
 597
 598 int BrowserMainLoop::CreateThreads() {
 599   TRACE_EVENT0("startup", "BrowserMainLoop::CreateThreads");
 600
 601   base::Thread::Options default_options;
 602   base::Thread::Options io_message_loop_options;
 603   io_message_loop_options.message_loop_type = base::MessageLoop::TYPE_IO;
 604   base::Thread::Options ui_message_loop_options;
 605   ui_message_loop_options.message_loop_type = base::MessageLoop::TYPE_UI;
 606
 607   // Start threads in the order they occur in the BrowserThread::ID
 608   // enumeration, except for BrowserThread::UI which is the main
 609   // thread.
 610   //
 611   // Must be size_t so we can increment it.
 612   for (size_t thread_id = BrowserThread::UI + 1;
 613        thread_id < BrowserThread::ID_COUNT;
 614        ++thread_id) {
 615     scoped_ptr<BrowserProcessSubThread>* thread_to_start = NULL;
 616     base::Thread::Options* options = &default_options;
 617
 618     switch (thread_id) {
 619       case BrowserThread::DB:
 620         TRACE_EVENT_BEGIN1("startup",
 621             "BrowserMainLoop::CreateThreads:start",
 622             "Thread", "BrowserThread::DB");
 623         thread_to_start = &db_thread_;
 624         break;
 625       case BrowserThread::FILE_USER_BLOCKING:
 626         TRACE_EVENT_BEGIN1("startup",
 627             "BrowserMainLoop::CreateThreads:start",
 628             "Thread", "BrowserThread::FILE_USER_BLOCKING");
 629         thread_to_start = &file_user_blocking_thread_;
 630         break;
 631       case BrowserThread::FILE:
 632         TRACE_EVENT_BEGIN1("startup",
 633             "BrowserMainLoop::CreateThreads:start",
 634             "Thread", "BrowserThread::FILE");
 635         thread_to_start = &file_thread_;
 636 #if defined(OS_WIN)
 637         // On Windows, the FILE thread needs to be have a UI message loop
 638         // which pumps messages in such a way that Google Update can
 639         // communicate back to us.
 640         options = &ui_message_loop_options;
 641 #else
 642         options = &io_message_loop_options;
 643 #endif
 644         break;
 645       case BrowserThread::PROCESS_LAUNCHER:
 646         TRACE_EVENT_BEGIN1("startup",
 647             "BrowserMainLoop::CreateThreads:start",
 648             "Thread", "BrowserThread::PROCESS_LAUNCHER");
 649         thread_to_start = &process_launcher_thread_;
 650         break;
 651       case BrowserThread::CACHE:
 652         TRACE_EVENT_BEGIN1("startup",
 653             "BrowserMainLoop::CreateThreads:start",
 654             "Thread", "BrowserThread::CACHE");
 655         thread_to_start = &cache_thread_;
 656         options = &io_message_loop_options;
 657         break;
 658       case BrowserThread::IO:
 659         TRACE_EVENT_BEGIN1("startup",
 660             "BrowserMainLoop::CreateThreads:start",
 661             "Thread", "BrowserThread::IO");
 662         thread_to_start = &io_thread_;
 663         options = &io_message_loop_options;
 664         break;
 665       case BrowserThread::UI:
 666       case BrowserThread::ID_COUNT:
 667       default:
 668         NOTREACHED();
 669         break;
 670     }
 671
 672     BrowserThread::ID id = static_cast<BrowserThread::ID>(thread_id);
 673
 674     if (thread_to_start) {
 675       (*thread_to_start).reset(new BrowserProcessSubThread(id));
 676       (*thread_to_start)->StartWithOptions(*options);
 677     } else {
 678       NOTREACHED();
 679     }
 680
 681     TRACE_EVENT_END0("startup", "BrowserMainLoop::CreateThreads:start");
 682
 683   }
 684   created_threads_ = true;
 685   return result_code_;
 686 }
 687
 688 int BrowserMainLoop::PreMainMessageLoopRun() {
 689   if (parts_) {
 690     TRACE_EVENT0("startup",
 691         "BrowserMainLoop::CreateThreads:PreMainMessageLoopRun");
 692     parts_->PreMainMessageLoopRun();
 693   }
 694
 695   // If the UI thread blocks, the whole UI is unresponsive.
 696   // Do not allow disk IO from the UI thread.
 697   base::ThreadRestrictions::SetIOAllowed(false);
 698   base::ThreadRestrictions::DisallowWaiting();
 699   return result_code_;
 700 }
 701
 702 void BrowserMainLoop::RunMainMessageLoopParts() {
 703   TRACE_EVENT_BEGIN_ETW("BrowserMain:MESSAGE_LOOP", 0, "");
 704
 705   bool ran_main_loop = false;
 706   if (parts_)
 707     ran_main_loop = parts_->MainMessageLoopRun(&result_code_);
 708
 709   if (!ran_main_loop)
 710     MainMessageLoopRun();
 711
 712   TRACE_EVENT_END_ETW("BrowserMain:MESSAGE_LOOP", 0, "");
 713 }
 714
 715 void BrowserMainLoop::ShutdownThreadsAndCleanUp() {
 716   if (!created_threads_) {
 717     // Called early, nothing to do
 718     return;
 719   }
 720   TRACE_EVENT0("shutdown", "BrowserMainLoop::ShutdownThreadsAndCleanUp");
 721
 722   // Teardown may start in PostMainMessageLoopRun, and during teardown we
 723   // need to be able to perform IO.
 724   base::ThreadRestrictions::SetIOAllowed(true);
 725   BrowserThread::PostTask(
 726       BrowserThread::IO, FROM_HERE,
 727       base::Bind(base::IgnoreResult(&base::ThreadRestrictions::SetIOAllowed),
 728                  true));
 729
 730 #if !defined(OS_IOS)
 731   if (RenderProcessHost::run_renderer_in_process())
 732     RenderProcessHostImpl::ShutDownInProcessRenderer();
 733 #endif
 734
 735   if (parts_) {
 736     TRACE_EVENT0("shutdown",
 737                  "BrowserMainLoop::Subsystem:PostMainMessageLoopRun");
 738     parts_->PostMainMessageLoopRun();
 739   }
 740
 741   trace_memory_controller_.reset();
 742   system_stats_monitor_.reset();
 743
 744 #if !defined(OS_IOS)
 745   // Destroying the GpuProcessHostUIShims on the UI thread posts a task to
 746   // delete related objects on the GPU thread. This must be done before
 747   // stopping the GPU thread. The GPU thread will close IPC channels to renderer
 748   // processes so this has to happen before stopping the IO thread.
 749   {
 750     TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:GPUProcessHostShim");
 751     GpuProcessHostUIShim::DestroyAll();
 752   }
 753   // Cancel pending requests and prevent new requests.
 754   if (resource_dispatcher_host_) {
 755     TRACE_EVENT0("shutdown",
 756                  "BrowserMainLoop::Subsystem:ResourceDispatcherHost");
 757     resource_dispatcher_host_.get()->Shutdown();
 758   }
 759
 760 #if defined(USE_AURA) || defined(OS_MACOSX)
 761   if (ShouldInitializeBrowserGpuChannelAndTransportSurface()) {
 762     TRACE_EVENT0("shutdown",
 763                  "BrowserMainLoop::Subsystem:ImageTransportFactory");
 764     ImageTransportFactory::Terminate();
 765   }
 766 #endif
 767
 768 #if defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
 769   ZygoteHostImpl::GetInstance()->TearDownAfterLastChild();
 770 #endif  // defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
 771
 772   // The device monitors are using |system_monitor_| as dependency, so delete
 773   // them before |system_monitor_| goes away.
 774   // On Mac and windows, the monitor needs to be destroyed on the same thread
 775   // as they were created. On Linux, the monitor will be deleted when IO thread
 776   // goes away.
 777 #if defined(OS_WIN)
 778   system_message_window_.reset();
 779 #elif defined(OS_MACOSX)
 780   device_monitor_mac_.reset();
 781 #endif
 782 #endif  // !defined(OS_IOS)
 783
 784   // Must be size_t so we can subtract from it.
 785   for (size_t thread_id = BrowserThread::ID_COUNT - 1;
 786        thread_id >= (BrowserThread::UI + 1);
 787        --thread_id) {
 788     // Find the thread object we want to stop. Looping over all valid
 789     // BrowserThread IDs and DCHECKing on a missing case in the switch
 790     // statement helps avoid a mismatch between this code and the
 791     // BrowserThread::ID enumeration.
 792     //
 793     // The destruction order is the reverse order of occurrence in the
 794     // BrowserThread::ID list. The rationale for the order is as
 795     // follows (need to be filled in a bit):
 796     //
 797     //
 798     // - The IO thread is the only user of the CACHE thread.
 799     //
 800     // - The PROCESS_LAUNCHER thread must be stopped after IO in case
 801     //   the IO thread posted a task to terminate a process on the
 802     //   process launcher thread.
 803     //
 804     // - (Not sure why DB stops last.)
 805     switch (thread_id) {
 806       case BrowserThread::DB: {
 807           TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:DBThread");
 808           db_thread_.reset();
 809         }
 810         break;
 811       case BrowserThread::FILE_USER_BLOCKING: {
 812           TRACE_EVENT0("shutdown",
 813                        "BrowserMainLoop::Subsystem:FileUserBlockingThread");
 814           file_user_blocking_thread_.reset();
 815         }
 816         break;
 817       case BrowserThread::FILE: {
 818           TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:FileThread");
 819 #if !defined(OS_IOS)
 820           // Clean up state that lives on or uses the file_thread_ before
 821           // it goes away.
 822           if (resource_dispatcher_host_)
 823             resource_dispatcher_host_.get()->save_file_manager()->Shutdown();
 824 #endif  // !defined(OS_IOS)
 825           file_thread_.reset();
 826         }
 827         break;
 828       case BrowserThread::PROCESS_LAUNCHER: {
 829           TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:LauncherThread");
 830           process_launcher_thread_.reset();
 831         }
 832         break;
 833       case BrowserThread::CACHE: {
 834           TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:CacheThread");
 835           cache_thread_.reset();
 836         }
 837         break;
 838       case BrowserThread::IO: {
 839           TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:IOThread");
 840           io_thread_.reset();
 841         }
 842         break;
 843       case BrowserThread::UI:
 844       case BrowserThread::ID_COUNT:
 845       default:
 846         NOTREACHED();
 847         break;
 848     }
 849   }
 850
 851 #if !defined(OS_IOS)
 852   {
 853     TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:IndexedDBThread");
 854     indexed_db_thread_.reset();
 855   }
 856 #endif
 857
 858   // Close the blocking I/O pool after the other threads. Other threads such
 859   // as the I/O thread may need to schedule work like closing files or flushing
 860   // data during shutdown, so the blocking pool needs to be available. There
 861   // may also be slow operations pending that will blcok shutdown, so closing
 862   // it here (which will block until required operations are complete) gives
 863   // more head start for those operations to finish.
 864   {
 865     TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:ThreadPool");
 866     BrowserThreadImpl::ShutdownThreadPool();
 867   }
 868
 869 #if !defined(OS_IOS)
 870   // Must happen after the IO thread is shutdown since this may be accessed from
 871   // it.
 872   {
 873     TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:GPUChannelFactory");
 874     if (BrowserGpuChannelHostFactory::instance())
 875       BrowserGpuChannelHostFactory::Terminate();
 876   }
 877
 878   // Must happen after the I/O thread is shutdown since this class lives on the
 879   // I/O thread and isn't threadsafe.
 880   {
 881     TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:GamepadService");
 882     GamepadService::GetInstance()->Terminate();
 883   }
 884   {
 885     TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:SensorService");
 886     DeviceInertialSensorService::GetInstance()->Shutdown();
 887   }
 888   {
 889     TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:BatteryStatusService");
 890     BatteryStatusService::GetInstance()->Shutdown();
 891   }
 892   {
 893     TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:DeleteDataSources");
 894     URLDataManager::DeleteDataSources();
 895   }
 896 #endif  // !defined(OS_IOS)
 897
 898   if (parts_) {
 899     TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:PostDestroyThreads");
 900     parts_->PostDestroyThreads();
 901   }
 902 }
 903
 904 void BrowserMainLoop::InitializeMainThread() {
 905   TRACE_EVENT0("startup", "BrowserMainLoop::InitializeMainThread");
 906   const char* kThreadName = "CrBrowserMain";
 907   base::PlatformThread::SetName(kThreadName);
 908   if (main_message_loop_)
 909     main_message_loop_->set_thread_name(kThreadName);
 910
 911   // Register the main thread by instantiating it, but don't call any methods.
 912   main_thread_.reset(
 913       new BrowserThreadImpl(BrowserThread::UI, base::MessageLoop::current()));
 914 }
 915
 916 int BrowserMainLoop::BrowserThreadsStarted() {
 917   TRACE_EVENT0("startup", "BrowserMainLoop::BrowserThreadsStarted");
 918
 919 #if !defined(OS_IOS)
 920   indexed_db_thread_.reset(new base::Thread("IndexedDB"));
 921   indexed_db_thread_->Start();
 922 #endif
 923
 924 #if defined(OS_ANDROID)
 925   // Up the priority of anything that touches with display tasks
 926   // (this thread is UI thread, and io_thread_ is for IPCs).
 927   io_thread_->SetPriority(base::kThreadPriority_Display);
 928   base::PlatformThread::SetThreadPriority(
 929       base::PlatformThread::CurrentHandle(),
 930       base::kThreadPriority_Display);
 931 #endif
 932
 933 #if !defined(OS_IOS)
 934   HistogramSynchronizer::GetInstance();
 935
 936 #if defined(OS_ANDROID)
 937   // On Android, GLSurface::InitializeOneOff() must be called before initalizing
 938   // the GpuDataManagerImpl as it uses the GL bindings. crbug.com/326295
 939   if (!gfx::GLSurface::InitializeOneOff())
 940     LOG(FATAL) << "GLSurface::InitializeOneOff failed";
 941 #endif
 942
 943   // Initialize the GpuDataManager before we set up the MessageLoops because
 944   // otherwise we'll trigger the assertion about doing IO on the UI thread.
 945   GpuDataManagerImpl::GetInstance()->Initialize();
 946
 947   bool always_uses_gpu = true;
 948   bool established_gpu_channel = false;
 949 #if defined(USE_AURA) || defined(OS_MACOSX)
 950   if (ShouldInitializeBrowserGpuChannelAndTransportSurface()) {
 951     established_gpu_channel = true;
 952     if (!GpuDataManagerImpl::GetInstance()->CanUseGpuBrowserCompositor()) {
 953       established_gpu_channel = always_uses_gpu = false;
 954     }
 955     BrowserGpuChannelHostFactory::Initialize(established_gpu_channel);
 956     ImageTransportFactory::Initialize();
 957 #if defined(USE_AURA)
 958     if (aura::Env::GetInstance()) {
 959       aura::Env::GetInstance()->set_context_factory(
 960           content::GetContextFactory());
 961     }
 962 #endif
 963   }
 964 #elif defined(OS_ANDROID)
 965   established_gpu_channel = true;
 966   BrowserGpuChannelHostFactory::Initialize(established_gpu_channel);
 967 #endif
 968
 969 #if defined(OS_LINUX) && defined(USE_UDEV)
 970   device_monitor_linux_.reset(new DeviceMonitorLinux());
 971 #elif defined(OS_MACOSX)
 972   device_monitor_mac_.reset(new DeviceMonitorMac());
 973 #endif
 974
 975   // RDH needs the IO thread to be created
 976   {
 977     TRACE_EVENT0("startup",
 978       "BrowserMainLoop::BrowserThreadsStarted:InitResourceDispatcherHost");
 979     resource_dispatcher_host_.reset(new ResourceDispatcherHostImpl());
 980   }
 981
 982   // MediaStreamManager needs the IO thread to be created.
 983   {
 984     TRACE_EVENT0("startup",
 985       "BrowserMainLoop::BrowserThreadsStarted:InitMediaStreamManager");
 986     media_stream_manager_.reset(new MediaStreamManager(audio_manager_.get()));
 987   }
 988
 989   {
 990     TRACE_EVENT0("startup",
 991       "BrowserMainLoop::BrowserThreadsStarted:InitSpeechRecognition");
 992     speech_recognition_manager_.reset(new SpeechRecognitionManagerImpl(
 993         audio_manager_.get(), media_stream_manager_.get()));
 994   }
 995
 996   {
 997     TRACE_EVENT0(
 998         "startup",
 999         "BrowserMainLoop::BrowserThreadsStarted::InitUserInputMonitor");
1000     user_input_monitor_ = media::UserInputMonitor::Create(
1001         io_thread_->message_loop_proxy(), main_thread_->message_loop_proxy());
1002   }
1003
1004   {
1005     TRACE_EVENT0("startup",
1006                  "BrowserMainLoop::BrowserThreadsStarted::TimeZoneMonitor");
1007     time_zone_monitor_ = TimeZoneMonitor::Create();
1008   }
1009
1010   // Alert the clipboard class to which threads are allowed to access the
1011   // clipboard:
1012   std::vector<base::PlatformThreadId> allowed_clipboard_threads;
1013   // The current thread is the UI thread.
1014   allowed_clipboard_threads.push_back(base::PlatformThread::CurrentId());
1015 #if defined(OS_WIN)
1016   // On Windows, clipboards are also used on the File or IO threads.
1017   allowed_clipboard_threads.push_back(file_thread_->thread_id());
1018   allowed_clipboard_threads.push_back(io_thread_->thread_id());
1019 #endif
1020   ui::Clipboard::SetAllowedThreads(allowed_clipboard_threads);
1021
1022   // When running the GPU thread in-process, avoid optimistically starting it
1023   // since creating the GPU thread races against creation of the one-and-only
1024   // ChildProcess instance which is created by the renderer thread.
1025   if (GpuDataManagerImpl::GetInstance()->GpuAccessAllowed(NULL) &&
1026       !established_gpu_channel &&
1027       always_uses_gpu &&
1028       !parsed_command_line_.HasSwitch(switches::kSingleProcess) &&
1029       !parsed_command_line_.HasSwitch(switches::kInProcessGPU)) {
1030     TRACE_EVENT_INSTANT0("gpu", "Post task to launch GPU process",
1031                          TRACE_EVENT_SCOPE_THREAD);
1032     BrowserThread::PostTask(
1033         BrowserThread::IO, FROM_HERE, base::Bind(
1034             base::IgnoreResult(&GpuProcessHost::Get),
1035             GpuProcessHost::GPU_PROCESS_KIND_SANDBOXED,
1036             CAUSE_FOR_GPU_LAUNCH_BROWSER_STARTUP));
1037   }
1038
1039 #if defined(OS_MACOSX)
1040   ThemeHelperMac::GetInstance();
1041 #endif
1042 #endif  // !defined(OS_IOS)
1043
1044   return result_code_;
1045 }
1046
1047 bool BrowserMainLoop::InitializeToolkit() {
1048   TRACE_EVENT0("startup", "BrowserMainLoop::InitializeToolkit");
1049   // TODO(evan): this function is rather subtle, due to the variety
1050   // of intersecting ifdefs we have.  To keep it easy to follow, there
1051   // are no #else branches on any #ifs.
1052   // TODO(stevenjb): Move platform specific code into platform specific Parts
1053   // (Need to add InitializeToolkit stage to BrowserParts).
1054   // See also GTK setup in EarlyInitialization, above, and associated comments.
1055
1056 #if defined(TOOLKIT_GTK)
1057   // It is important for this to happen before the first run dialog, as it
1058   // styles the dialog as well.
1059   gfx::InitRCStyles();
1060 #endif
1061
1062 #if defined(OS_WIN)
1063   // Init common control sex.
1064   INITCOMMONCONTROLSEX config;
1065   config.dwSize = sizeof(config);
1066   config.dwICC = ICC_WIN95_CLASSES;
1067   if (!InitCommonControlsEx(&config))
1068     PLOG(FATAL);
1069 #endif
1070
1071 #if defined(USE_AURA)
1072
1073 #if defined(USE_X11)
1074   if (!gfx::GetXDisplay())
1075     return false;
1076 #endif
1077
1078   // Env creates the compositor. Aura widgets need the compositor to be created
1079   // before they can be initialized by the browser.
1080   aura::Env::CreateInstance(true);
1081 #endif  // defined(USE_AURA)
1082
1083   if (parts_)
1084     parts_->ToolkitInitialized();
1085
1086   return true;
1087 }
1088
1089 void BrowserMainLoop::MainMessageLoopRun() {
1090 #if defined(OS_ANDROID)
1091   // Android's main message loop is the Java message loop.
1092   NOTREACHED();
1093 #else
1094   DCHECK(base::MessageLoopForUI::IsCurrent());
1095   if (parameters_.ui_task)
1096     base::MessageLoopForUI::current()->PostTask(FROM_HERE,
1097                                                 *parameters_.ui_task);
1098
1099   base::RunLoop run_loop;
1100   run_loop.Run();
1101 #endif
1102 }
1103
1104 void BrowserMainLoop::InitStartupTracing(const CommandLine& command_line) {
1105   DCHECK(is_tracing_startup_);
1106
1107   base::FilePath trace_file = command_line.GetSwitchValuePath(
1108       switches::kTraceStartupFile);
1109   // trace_file = "none" means that startup events will show up for the next
1110   // begin/end tracing (via about:tracing or AutomationProxy::BeginTracing/
1111   // EndTracing, for example).
1112   if (trace_file == base::FilePath().AppendASCII("none"))
1113     return;
1114
1115   if (trace_file.empty()) {
1116 #if defined(OS_ANDROID)
1117     TracingControllerAndroid::GenerateTracingFilePath(&trace_file);
1118 #else
1119     // Default to saving the startup trace into the current dir.
1120     trace_file = base::FilePath().AppendASCII("chrometrace.log");
1121 #endif
1122   }
1123
1124   std::string delay_str = command_line.GetSwitchValueASCII(
1125       switches::kTraceStartupDuration);
1126   int delay_secs = 5;
1127   if (!delay_str.empty() && !base::StringToInt(delay_str, &delay_secs)) {
1128     DLOG(WARNING) << "Could not parse --" << switches::kTraceStartupDuration
1129         << "=" << delay_str << " defaulting to 5 (secs)";
1130     delay_secs = 5;
1131   }
1132
1133   BrowserThread::PostDelayedTask(
1134       BrowserThread::UI, FROM_HERE,
1135       base::Bind(&BrowserMainLoop::EndStartupTracing,
1136                  base::Unretained(this), trace_file),
1137       base::TimeDelta::FromSeconds(delay_secs));
1138 }
1139
1140 void BrowserMainLoop::EndStartupTracing(const base::FilePath& trace_file) {
1141   is_tracing_startup_ = false;
1142   TracingController::GetInstance()->DisableRecording(
1143       trace_file, base::Bind(&OnStoppedStartupTracing));
1144 }
1145
1146 }  // namespace content