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/logging.h"
  11 #include "base/message_loop/message_loop.h"
  12 #include "base/metrics/field_trial.h"
  13 #include "base/metrics/histogram.h"
  14 #include "base/path_service.h"
  15 #include "base/pending_task.h"
  16 #include "base/power_monitor/power_monitor.h"
  17 #include "base/power_monitor/power_monitor_device_source.h"
  18 #include "base/process/process_metrics.h"
  19 #include "base/run_loop.h"
  20 #include "base/strings/string_number_conversions.h"
  21 #include "base/system_monitor/system_monitor.h"
  22 #include "base/thread_task_runner_handle.h"
  23 #include "base/threading/thread_restrictions.h"
  24 #include "base/timer/hi_res_timer_manager.h"
  25 #include "content/browser/battery_status/battery_status_service.h"
  26 #include "content/browser/browser_thread_impl.h"
  27 #include "content/browser/device_sensors/device_inertial_sensor_service.h"
  28 #include "content/browser/download/save_file_manager.h"
  29 #include "content/browser/gamepad/gamepad_service.h"
  30 #include "content/browser/gpu/browser_gpu_channel_host_factory.h"
  31 #include "content/browser/gpu/compositor_util.h"
  32 #include "content/browser/gpu/gpu_data_manager_impl.h"
  33 #include "content/browser/gpu/gpu_process_host.h"
  34 #include "content/browser/gpu/gpu_process_host_ui_shim.h"
  35 #include "content/browser/histogram_synchronizer.h"
  36 #include "content/browser/loader/resource_dispatcher_host_impl.h"
  37 #include "content/browser/media/media_internals.h"
  38 #include "content/browser/net/browser_online_state_observer.h"
  39 #include "content/browser/renderer_host/media/media_stream_manager.h"
  40 #include "content/browser/speech/speech_recognition_manager_impl.h"
  41 #include "content/browser/startup_task_runner.h"
  42 #include "content/browser/time_zone_monitor.h"
  43 #include "content/browser/webui/content_web_ui_controller_factory.h"
  44 #include "content/browser/webui/url_data_manager.h"
  45 #include "content/public/browser/browser_main_parts.h"
  46 #include "content/public/browser/browser_shutdown.h"
  47 #include "content/public/browser/content_browser_client.h"
  48 #include "content/public/browser/render_process_host.h"
  49 #include "content/public/browser/tracing_controller.h"
  50 #include "content/public/common/content_switches.h"
  51 #include "content/public/common/main_function_params.h"
  52 #include "content/public/common/result_codes.h"
  53 #include "crypto/nss_util.h"
  54 #include "media/audio/audio_manager.h"
  55 #include "media/base/media.h"
  56 #include "media/base/user_input_monitor.h"
  57 #include "media/midi/midi_manager.h"
  58 #include "net/base/network_change_notifier.h"
  59 #include "net/socket/client_socket_factory.h"
  60 #include "net/ssl/ssl_config_service.h"
  61 #include "ui/base/clipboard/clipboard.h"
  62
  63 #if defined(USE_AURA) || (defined(OS_MACOSX) && !defined(OS_IOS))
  64 #include "content/browser/compositor/image_transport_factory.h"
  65 #endif
  66
  67 #if defined(USE_AURA)
  68 #include "content/public/browser/context_factory.h"
  69 #include "ui/aura/env.h"
  70 #endif
  71
  72 #if !defined(OS_IOS)
  73 #include "content/browser/renderer_host/render_process_host_impl.h"
  74 #endif
  75
  76 #if defined(OS_ANDROID)
  77 #include "base/android/jni_android.h"
  78 #include "content/browser/android/browser_startup_controller.h"
  79 #include "content/browser/android/surface_texture_peer_browser_impl.h"
  80 #include "content/browser/android/tracing_controller_android.h"
  81 #include "ui/gl/gl_surface.h"
  82 #endif
  83
  84 #if defined(OS_MACOSX) && !defined(OS_IOS)
  85 #include "content/browser/bootstrap_sandbox_mac.h"
  86 #include "content/browser/cocoa/system_hotkey_helper_mac.h"
  87 #include "content/browser/theme_helper_mac.h"
  88 #endif
  89
  90 #if defined(OS_WIN)
  91 #include <windows.h>
  92 #include <commctrl.h>
  93 #include <shellapi.h>
  94
  95 #include "content/browser/system_message_window_win.h"
  96 #include "content/common/sandbox_win.h"
  97 #include "net/base/winsock_init.h"
  98 #include "ui/base/l10n/l10n_util_win.h"
  99 #endif
 100
 101 #if defined(USE_GLIB)
 102 #include <glib-object.h>
 103 #endif
 104
 105 #if defined(OS_LINUX) && defined(USE_UDEV)
 106 #include "content/browser/device_monitor_udev.h"
 107 #elif defined(OS_MACOSX) && !defined(OS_IOS)
 108 #include "content/browser/device_monitor_mac.h"
 109 #endif
 110
 111 #if defined(OS_POSIX) && !defined(OS_MACOSX)
 112 #include "content/browser/renderer_host/render_sandbox_host_linux.h"
 113 #include "content/browser/zygote_host/zygote_host_impl_linux.h"
 114 #include "sandbox/linux/suid/client/setuid_sandbox_client.h"
 115 #endif
 116
 117 #if defined(ENABLE_PLUGINS)
 118 #include "content/browser/plugin_service_impl.h"
 119 #endif
 120
 121 #if defined(TCMALLOC_TRACE_MEMORY_SUPPORTED)
 122 #include "third_party/tcmalloc/chromium/src/gperftools/heap-profiler.h"
 123 #endif
 124
 125 #if defined(USE_X11)
 126 #include "ui/gfx/x/x11_connection.h"
 127 #include "ui/gfx/x/x11_types.h"
 128 #endif
 129
 130 // One of the linux specific headers defines this as a macro.
 131 #ifdef DestroyAll
 132 #undef DestroyAll
 133 #endif
 134
 135 namespace content {
 136 namespace {
 137
 138 #if defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
 139 void SetupSandbox(const base::CommandLine& parsed_command_line) {
 140   TRACE_EVENT0("startup", "SetupSandbox");
 141   base::FilePath sandbox_binary;
 142
 143   scoped_ptr<sandbox::SetuidSandboxClient> setuid_sandbox_client(
 144       sandbox::SetuidSandboxClient::Create());
 145
 146   const bool want_setuid_sandbox =
 147       !parsed_command_line.HasSwitch(switches::kNoSandbox) &&
 148       !parsed_command_line.HasSwitch(switches::kDisableSetuidSandbox) &&
 149       !setuid_sandbox_client->IsDisabledViaEnvironment();
 150
 151   static const char no_suid_error[] =
 152       "Running without the SUID sandbox! See "
 153       "https://code.google.com/p/chromium/wiki/LinuxSUIDSandboxDevelopment "
 154       "for more information on developing with the sandbox on.";
 155   if (want_setuid_sandbox) {
 156     sandbox_binary = setuid_sandbox_client->GetSandboxBinaryPath();
 157     if (sandbox_binary.empty()) {
 158       // This needs to be fatal. Talk to security@chromium.org if you feel
 159       // otherwise.
 160       LOG(FATAL) << no_suid_error;
 161     }
 162   } else {
 163     LOG(ERROR) << no_suid_error;
 164   }
 165
 166   // Tickle the sandbox host and zygote host so they fork now.
 167   RenderSandboxHostLinux::GetInstance()->Init();
 168   ZygoteHostImpl::GetInstance()->Init(sandbox_binary.value());
 169 }
 170 #endif
 171
 172 #if defined(USE_GLIB)
 173 static void GLibLogHandler(const gchar* log_domain,
 174                            GLogLevelFlags log_level,
 175                            const gchar* message,
 176                            gpointer userdata) {
 177   if (!log_domain)
 178     log_domain = "<unknown>";
 179   if (!message)
 180     message = "<no message>";
 181
 182   if (strstr(message, "Unable to retrieve the file info for")) {
 183     LOG(ERROR) << "GTK File code error: " << message;
 184   } else if (strstr(message, "Could not find the icon") &&
 185              strstr(log_domain, "Gtk")) {
 186     LOG(ERROR) << "GTK icon error: " << message;
 187   } else if (strstr(message, "Theme file for default has no") ||
 188              strstr(message, "Theme directory") ||
 189              strstr(message, "theme pixmap") ||
 190              strstr(message, "locate theme engine")) {
 191     LOG(ERROR) << "GTK theme error: " << message;
 192   } else if (strstr(message, "Unable to create Ubuntu Menu Proxy") &&
 193              strstr(log_domain, "<unknown>")) {
 194     LOG(ERROR) << "GTK menu proxy create failed";
 195   } else if (strstr(message, "Out of memory") &&
 196              strstr(log_domain, "<unknown>")) {
 197     LOG(ERROR) << "DBus call timeout or out of memory: "
 198                << "http://crosbug.com/15496";
 199   } else if (strstr(message, "Could not connect: Connection refused") &&
 200              strstr(log_domain, "<unknown>")) {
 201     LOG(ERROR) << "DConf settings backend could not connect to session bus: "
 202                << "http://crbug.com/179797";
 203   } else if (strstr(message, "Attempting to store changes into") ||
 204              strstr(message, "Attempting to set the permissions of")) {
 205     LOG(ERROR) << message << " (http://bugs.chromium.org/161366)";
 206   } else if (strstr(message, "drawable is not a native X11 window")) {
 207     LOG(ERROR) << message << " (http://bugs.chromium.org/329991)";
 208   } else {
 209     LOG(DFATAL) << log_domain << ": " << message;
 210   }
 211 }
 212
 213 static void SetUpGLibLogHandler() {
 214   // Register GLib-handled assertions to go through our logging system.
 215   const char* kLogDomains[] = { NULL, "Gtk", "Gdk", "GLib", "GLib-GObject" };
 216   for (size_t i = 0; i < arraysize(kLogDomains); i++) {
 217     g_log_set_handler(kLogDomains[i],
 218                       static_cast<GLogLevelFlags>(G_LOG_FLAG_RECURSION |
 219                                                   G_LOG_FLAG_FATAL |
 220                                                   G_LOG_LEVEL_ERROR |
 221                                                   G_LOG_LEVEL_CRITICAL |
 222                                                   G_LOG_LEVEL_WARNING),
 223                       GLibLogHandler,
 224                       NULL);
 225   }
 226 }
 227 #endif
 228
 229 void OnStoppedStartupTracing(const base::FilePath& trace_file) {
 230   VLOG(0) << "Completed startup tracing to " << trace_file.value();
 231 }
 232
 233 #if defined(USE_AURA)
 234 bool ShouldInitializeBrowserGpuChannelAndTransportSurface() {
 235   return true;
 236 }
 237 #elif defined(OS_MACOSX) && !defined(OS_IOS)
 238 bool ShouldInitializeBrowserGpuChannelAndTransportSurface() {
 239   return IsDelegatedRendererEnabled();
 240 }
 241 #endif
 242
 243 // Disable optimizations for this block of functions so the compiler doesn't
 244 // merge them all together. This makes it possible to tell what thread was
 245 // unresponsive by inspecting the callstack.
 246 MSVC_DISABLE_OPTIMIZE()
 247 MSVC_PUSH_DISABLE_WARNING(4748)
 248
 249 NOINLINE void ResetThread_DB(scoped_ptr<BrowserProcessSubThread> thread) {
 250   thread.reset();
 251 }
 252
 253 NOINLINE void ResetThread_FILE(scoped_ptr<BrowserProcessSubThread> thread) {
 254   thread.reset();
 255 }
 256
 257 NOINLINE void ResetThread_FILE_USER_BLOCKING(
 258     scoped_ptr<BrowserProcessSubThread> thread) {
 259   thread.reset();
 260 }
 261
 262 NOINLINE void ResetThread_PROCESS_LAUNCHER(
 263     scoped_ptr<BrowserProcessSubThread> thread) {
 264   thread.reset();
 265 }
 266
 267 NOINLINE void ResetThread_CACHE(scoped_ptr<BrowserProcessSubThread> thread) {
 268   thread.reset();
 269 }
 270
 271 NOINLINE void ResetThread_IO(scoped_ptr<BrowserProcessSubThread> thread) {
 272   thread.reset();
 273 }
 274
 275 #if !defined(OS_IOS)
 276 NOINLINE void ResetThread_IndexedDb(scoped_ptr<base::Thread> thread) {
 277   thread.reset();
 278 }
 279 #endif
 280
 281 MSVC_POP_WARNING()
 282 MSVC_ENABLE_OPTIMIZE();
 283
 284 }  // namespace
 285
 286 // The currently-running BrowserMainLoop.  There can be one or zero.
 287 BrowserMainLoop* g_current_browser_main_loop = NULL;
 288
 289 // This is just to be able to keep ShutdownThreadsAndCleanUp out of
 290 // the public interface of BrowserMainLoop.
 291 class BrowserShutdownImpl {
 292  public:
 293   static void ImmediateShutdownAndExitProcess() {
 294     DCHECK(g_current_browser_main_loop);
 295     g_current_browser_main_loop->ShutdownThreadsAndCleanUp();
 296
 297 #if defined(OS_WIN)
 298     // At this point the message loop is still running yet we've shut everything
 299     // down. If any messages are processed we'll likely crash. Exit now.
 300     ExitProcess(RESULT_CODE_NORMAL_EXIT);
 301 #elif defined(OS_POSIX) && !defined(OS_MACOSX)
 302     _exit(RESULT_CODE_NORMAL_EXIT);
 303 #else
 304     NOTIMPLEMENTED();
 305 #endif
 306   }
 307 };
 308
 309 void ImmediateShutdownAndExitProcess() {
 310   BrowserShutdownImpl::ImmediateShutdownAndExitProcess();
 311 }
 312
 313 // For measuring memory usage after each task. Behind a command line flag.
 314 class BrowserMainLoop::MemoryObserver : public base::MessageLoop::TaskObserver {
 315  public:
 316   MemoryObserver() {}
 317   virtual ~MemoryObserver() {}
 318
 319   virtual void WillProcessTask(const base::PendingTask& pending_task) OVERRIDE {
 320   }
 321
 322   virtual void DidProcessTask(const base::PendingTask& pending_task) OVERRIDE {
 323 #if !defined(OS_IOS)  // No ProcessMetrics on IOS.
 324     scoped_ptr<base::ProcessMetrics> process_metrics(
 325         base::ProcessMetrics::CreateProcessMetrics(
 326 #if defined(OS_MACOSX)
 327             base::GetCurrentProcessHandle(), NULL));
 328 #else
 329             base::GetCurrentProcessHandle()));
 330 #endif
 331     size_t private_bytes;
 332     process_metrics->GetMemoryBytes(&private_bytes, NULL);
 333     LOCAL_HISTOGRAM_MEMORY_KB("Memory.BrowserUsed", private_bytes >> 10);
 334 #endif
 335   }
 336  private:
 337   DISALLOW_COPY_AND_ASSIGN(MemoryObserver);
 338 };
 339
 340
 341 // BrowserMainLoop construction / destruction =============================
 342
 343 BrowserMainLoop* BrowserMainLoop::GetInstance() {
 344   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 345   return g_current_browser_main_loop;
 346 }
 347
 348 BrowserMainLoop::BrowserMainLoop(const MainFunctionParams& parameters)
 349     : parameters_(parameters),
 350       parsed_command_line_(parameters.command_line),
 351       result_code_(RESULT_CODE_NORMAL_EXIT),
 352       created_threads_(false),
 353       // ContentMainRunner should have enabled tracing of the browser process
 354       // when kTraceStartup is in the command line.
 355       is_tracing_startup_(
 356           parameters.command_line.HasSwitch(switches::kTraceStartup)) {
 357   DCHECK(!g_current_browser_main_loop);
 358   g_current_browser_main_loop = this;
 359 }
 360
 361 BrowserMainLoop::~BrowserMainLoop() {
 362   DCHECK_EQ(this, g_current_browser_main_loop);
 363 #if !defined(OS_IOS)
 364   ui::Clipboard::DestroyClipboardForCurrentThread();
 365 #endif  // !defined(OS_IOS)
 366   g_current_browser_main_loop = NULL;
 367 }
 368
 369 void BrowserMainLoop::Init() {
 370   TRACE_EVENT0("startup", "BrowserMainLoop::Init");
 371   parts_.reset(
 372       GetContentClient()->browser()->CreateBrowserMainParts(parameters_));
 373 }
 374
 375 // BrowserMainLoop stages ==================================================
 376
 377 void BrowserMainLoop::EarlyInitialization() {
 378   TRACE_EVENT0("startup", "BrowserMainLoop::EarlyInitialization");
 379
 380 #if defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
 381   // No thread should be created before this call, as SetupSandbox()
 382   // will end-up using fork().
 383   SetupSandbox(parsed_command_line_);
 384 #endif
 385
 386 #if defined(USE_X11)
 387   if (parsed_command_line_.HasSwitch(switches::kSingleProcess) ||
 388       parsed_command_line_.HasSwitch(switches::kInProcessGPU)) {
 389     if (!gfx::InitializeThreadedX11()) {
 390       LOG(ERROR) << "Failed to put Xlib into threaded mode.";
 391     }
 392   }
 393 #endif
 394
 395   // GLib's spawning of new processes is buggy, so it's important that at this
 396   // point GLib does not need to start DBUS. Chrome should always start with
 397   // DBUS_SESSION_BUS_ADDRESS properly set. See crbug.com/309093.
 398 #if defined(USE_GLIB)
 399   // g_type_init will be deprecated in 2.36. 2.35 is the development
 400   // version for 2.36, hence do not call g_type_init starting 2.35.
 401   // http://developer.gnome.org/gobject/unstable/gobject-Type-Information.html#g-type-init
 402 #if !GLIB_CHECK_VERSION(2, 35, 0)
 403   // GLib type system initialization. Needed at least for gconf,
 404   // used in net/proxy/proxy_config_service_linux.cc. Most likely
 405   // this is superfluous as gtk_init() ought to do this. It's
 406   // definitely harmless, so retained as a reminder of this
 407   // requirement for gconf.
 408   g_type_init();
 409 #endif
 410
 411   SetUpGLibLogHandler();
 412 #endif
 413
 414   if (parts_)
 415     parts_->PreEarlyInitialization();
 416
 417 #if defined(OS_MACOSX)
 418   // We use quite a few file descriptors for our IPC, and the default limit on
 419   // the Mac is low (256), so bump it up.
 420   base::SetFdLimit(1024);
 421 #endif
 422
 423 #if defined(OS_WIN)
 424   net::EnsureWinsockInit();
 425 #endif
 426
 427 #if !defined(USE_OPENSSL)
 428   // We want to be sure to init NSPR on the main thread.
 429   crypto::EnsureNSPRInit();
 430 #endif  // !defined(USE_OPENSSL)
 431
 432 #if !defined(OS_IOS)
 433   if (parsed_command_line_.HasSwitch(switches::kRendererProcessLimit)) {
 434     std::string limit_string = parsed_command_line_.GetSwitchValueASCII(
 435         switches::kRendererProcessLimit);
 436     size_t process_limit;
 437     if (base::StringToSizeT(limit_string, &process_limit)) {
 438       RenderProcessHost::SetMaxRendererProcessCount(process_limit);
 439     }
 440   }
 441 #endif  // !defined(OS_IOS)
 442
 443   if (parts_)
 444     parts_->PostEarlyInitialization();
 445 }
 446
 447 void BrowserMainLoop::MainMessageLoopStart() {
 448   TRACE_EVENT0("startup", "BrowserMainLoop::MainMessageLoopStart");
 449   if (parts_) {
 450     TRACE_EVENT0("startup",
 451         "BrowserMainLoop::MainMessageLoopStart:PreMainMessageLoopStart");
 452     parts_->PreMainMessageLoopStart();
 453   }
 454
 455 #if defined(OS_WIN)
 456   // If we're running tests (ui_task is non-null), then the ResourceBundle
 457   // has already been initialized.
 458   if (!parameters_.ui_task) {
 459     // Override the configured locale with the user's preferred UI language.
 460     l10n_util::OverrideLocaleWithUILanguageList();
 461   }
 462 #endif
 463
 464   // Create a MessageLoop if one does not already exist for the current thread.
 465   if (!base::MessageLoop::current())
 466     main_message_loop_.reset(new base::MessageLoopForUI);
 467
 468   InitializeMainThread();
 469
 470   {
 471     TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:SystemMonitor");
 472     system_monitor_.reset(new base::SystemMonitor);
 473   }
 474   {
 475     TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:PowerMonitor");
 476     scoped_ptr<base::PowerMonitorSource> power_monitor_source(
 477       new base::PowerMonitorDeviceSource());
 478     power_monitor_.reset(new base::PowerMonitor(power_monitor_source.Pass()));
 479   }
 480   {
 481     TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:HighResTimerManager");
 482     hi_res_timer_manager_.reset(new base::HighResolutionTimerManager);
 483   }
 484   {
 485     TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:NetworkChangeNotifier");
 486     network_change_notifier_.reset(net::NetworkChangeNotifier::Create());
 487   }
 488
 489 #if !defined(OS_IOS)
 490   {
 491     TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:MediaFeatures");
 492     media::InitializeCPUSpecificMediaFeatures();
 493   }
 494   {
 495     TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:AudioMan");
 496     audio_manager_.reset(media::AudioManager::Create(
 497         MediaInternals::GetInstance()));
 498   }
 499   {
 500     TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:MidiManager");
 501     midi_manager_.reset(media::MidiManager::Create());
 502   }
 503   {
 504     TRACE_EVENT0("startup",
 505                  "BrowserMainLoop::Subsystem:ContentWebUIController");
 506     WebUIControllerFactory::RegisterFactory(
 507         ContentWebUIControllerFactory::GetInstance());
 508   }
 509
 510   {
 511     TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:OnlineStateObserver");
 512     online_state_observer_.reset(new BrowserOnlineStateObserver);
 513   }
 514
 515   {
 516     system_stats_monitor_.reset(new base::debug::TraceEventSystemStatsMonitor(
 517         base::ThreadTaskRunnerHandle::Get()));
 518   }
 519 #endif  // !defined(OS_IOS)
 520
 521 #if defined(OS_WIN)
 522   system_message_window_.reset(new SystemMessageWindowWin);
 523 #endif
 524
 525   if (parts_)
 526     parts_->PostMainMessageLoopStart();
 527
 528 #if !defined(OS_IOS)
 529   // Start tracing to a file if needed. Only do this after starting the main
 530   // message loop to avoid calling MessagePumpForUI::ScheduleWork() before
 531   // MessagePumpForUI::Start() as it will crash the browser.
 532   if (is_tracing_startup_) {
 533     TRACE_EVENT0("startup", "BrowserMainLoop::InitStartupTracing");
 534     InitStartupTracing(parsed_command_line_);
 535   }
 536 #endif  // !defined(OS_IOS)
 537
 538 #if defined(OS_ANDROID)
 539   {
 540     TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:SurfaceTexturePeer");
 541     SurfaceTexturePeer::InitInstance(new SurfaceTexturePeerBrowserImpl());
 542   }
 543 #endif
 544
 545   if (parsed_command_line_.HasSwitch(switches::kMemoryMetrics)) {
 546     TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:MemoryObserver");
 547     memory_observer_.reset(new MemoryObserver());
 548     base::MessageLoop::current()->AddTaskObserver(memory_observer_.get());
 549   }
 550
 551 #if defined(TCMALLOC_TRACE_MEMORY_SUPPORTED)
 552   trace_memory_controller_.reset(new base::debug::TraceMemoryController(
 553       base::MessageLoop::current()->message_loop_proxy(),
 554       ::HeapProfilerWithPseudoStackStart,
 555       ::HeapProfilerStop,
 556       ::GetHeapProfile));
 557 #endif
 558 }
 559
 560 int BrowserMainLoop::PreCreateThreads() {
 561   if (parts_) {
 562     TRACE_EVENT0("startup",
 563         "BrowserMainLoop::CreateThreads:PreCreateThreads");
 564     result_code_ = parts_->PreCreateThreads();
 565   }
 566
 567 #if defined(ENABLE_PLUGINS)
 568   // Prior to any processing happening on the io thread, we create the
 569   // plugin service as it is predominantly used from the io thread,
 570   // but must be created on the main thread. The service ctor is
 571   // inexpensive and does not invoke the io_thread() accessor.
 572   {
 573     TRACE_EVENT0("startup", "BrowserMainLoop::CreateThreads:PluginService");
 574     PluginService::GetInstance()->Init();
 575   }
 576 #endif
 577
 578 #if !defined(OS_IOS) && (!defined(GOOGLE_CHROME_BUILD) || defined(OS_ANDROID))
 579   // Single-process is an unsupported and not fully tested mode, so
 580   // don't enable it for official Chrome builds (except on Android).
 581   if (parsed_command_line_.HasSwitch(switches::kSingleProcess))
 582     RenderProcessHost::SetRunRendererInProcess(true);
 583 #endif
 584   return result_code_;
 585 }
 586
 587 void BrowserMainLoop::CreateStartupTasks() {
 588   TRACE_EVENT0("startup", "BrowserMainLoop::CreateStartupTasks");
 589
 590   // First time through, we really want to create all the tasks
 591   if (!startup_task_runner_.get()) {
 592 #if defined(OS_ANDROID)
 593     startup_task_runner_ = make_scoped_ptr(new StartupTaskRunner(
 594         base::Bind(&BrowserStartupComplete),
 595         base::MessageLoop::current()->message_loop_proxy()));
 596 #else
 597     startup_task_runner_ = make_scoped_ptr(new StartupTaskRunner(
 598         base::Callback<void(int)>(),
 599         base::MessageLoop::current()->message_loop_proxy()));
 600 #endif
 601     StartupTask pre_create_threads =
 602         base::Bind(&BrowserMainLoop::PreCreateThreads, base::Unretained(this));
 603     startup_task_runner_->AddTask(pre_create_threads);
 604
 605     StartupTask create_threads =
 606         base::Bind(&BrowserMainLoop::CreateThreads, base::Unretained(this));
 607     startup_task_runner_->AddTask(create_threads);
 608
 609     StartupTask browser_thread_started = base::Bind(
 610         &BrowserMainLoop::BrowserThreadsStarted, base::Unretained(this));
 611     startup_task_runner_->AddTask(browser_thread_started);
 612
 613     StartupTask pre_main_message_loop_run = base::Bind(
 614         &BrowserMainLoop::PreMainMessageLoopRun, base::Unretained(this));
 615     startup_task_runner_->AddTask(pre_main_message_loop_run);
 616
 617 #if defined(OS_ANDROID)
 618     if (BrowserMayStartAsynchronously()) {
 619       startup_task_runner_->StartRunningTasksAsync();
 620     }
 621 #endif
 622   }
 623 #if defined(OS_ANDROID)
 624   if (!BrowserMayStartAsynchronously()) {
 625     // A second request for asynchronous startup can be ignored, so
 626     // StartupRunningTasksAsync is only called first time through. If, however,
 627     // this is a request for synchronous startup then it must override any
 628     // previous call for async startup, so we call RunAllTasksNow()
 629     // unconditionally.
 630     startup_task_runner_->RunAllTasksNow();
 631   }
 632 #else
 633   startup_task_runner_->RunAllTasksNow();
 634 #endif
 635 }
 636
 637 int BrowserMainLoop::CreateThreads() {
 638   TRACE_EVENT0("startup", "BrowserMainLoop::CreateThreads");
 639
 640   base::Thread::Options io_message_loop_options;
 641   io_message_loop_options.message_loop_type = base::MessageLoop::TYPE_IO;
 642   base::Thread::Options ui_message_loop_options;
 643   ui_message_loop_options.message_loop_type = base::MessageLoop::TYPE_UI;
 644
 645   // Start threads in the order they occur in the BrowserThread::ID
 646   // enumeration, except for BrowserThread::UI which is the main
 647   // thread.
 648   //
 649   // Must be size_t so we can increment it.
 650   for (size_t thread_id = BrowserThread::UI + 1;
 651        thread_id < BrowserThread::ID_COUNT;
 652        ++thread_id) {
 653     scoped_ptr<BrowserProcessSubThread>* thread_to_start = NULL;
 654     base::Thread::Options options;
 655
 656     switch (thread_id) {
 657       case BrowserThread::DB:
 658         TRACE_EVENT_BEGIN1("startup",
 659             "BrowserMainLoop::CreateThreads:start",
 660             "Thread", "BrowserThread::DB");
 661         thread_to_start = &db_thread_;
 662         options.timer_slack = base::TIMER_SLACK_MAXIMUM;
 663         break;
 664       case BrowserThread::FILE_USER_BLOCKING:
 665         TRACE_EVENT_BEGIN1("startup",
 666             "BrowserMainLoop::CreateThreads:start",
 667             "Thread", "BrowserThread::FILE_USER_BLOCKING");
 668         thread_to_start = &file_user_blocking_thread_;
 669         break;
 670       case BrowserThread::FILE:
 671         TRACE_EVENT_BEGIN1("startup",
 672             "BrowserMainLoop::CreateThreads:start",
 673             "Thread", "BrowserThread::FILE");
 674         thread_to_start = &file_thread_;
 675 #if defined(OS_WIN)
 676         // On Windows, the FILE thread needs to be have a UI message loop
 677         // which pumps messages in such a way that Google Update can
 678         // communicate back to us.
 679         options = ui_message_loop_options;
 680 #else
 681         options = io_message_loop_options;
 682 #endif
 683         options.timer_slack = base::TIMER_SLACK_MAXIMUM;
 684         break;
 685       case BrowserThread::PROCESS_LAUNCHER:
 686         TRACE_EVENT_BEGIN1("startup",
 687             "BrowserMainLoop::CreateThreads:start",
 688             "Thread", "BrowserThread::PROCESS_LAUNCHER");
 689         thread_to_start = &process_launcher_thread_;
 690         options.timer_slack = base::TIMER_SLACK_MAXIMUM;
 691         break;
 692       case BrowserThread::CACHE:
 693         TRACE_EVENT_BEGIN1("startup",
 694             "BrowserMainLoop::CreateThreads:start",
 695             "Thread", "BrowserThread::CACHE");
 696         thread_to_start = &cache_thread_;
 697         options = io_message_loop_options;
 698         options.timer_slack = base::TIMER_SLACK_MAXIMUM;
 699         break;
 700       case BrowserThread::IO:
 701         TRACE_EVENT_BEGIN1("startup",
 702             "BrowserMainLoop::CreateThreads:start",
 703             "Thread", "BrowserThread::IO");
 704         thread_to_start = &io_thread_;
 705         options = io_message_loop_options;
 706         break;
 707       case BrowserThread::UI:
 708       case BrowserThread::ID_COUNT:
 709       default:
 710         NOTREACHED();
 711         break;
 712     }
 713
 714     BrowserThread::ID id = static_cast<BrowserThread::ID>(thread_id);
 715
 716     if (thread_to_start) {
 717       (*thread_to_start).reset(new BrowserProcessSubThread(id));
 718       if (!(*thread_to_start)->StartWithOptions(options)) {
 719         LOG(FATAL) << "Failed to start the browser thread: id == " << id;
 720       }
 721     } else {
 722       NOTREACHED();
 723     }
 724
 725     TRACE_EVENT_END0("startup", "BrowserMainLoop::CreateThreads:start");
 726   }
 727   created_threads_ = true;
 728   return result_code_;
 729 }
 730
 731 int BrowserMainLoop::PreMainMessageLoopRun() {
 732   if (parts_) {
 733     TRACE_EVENT0("startup",
 734         "BrowserMainLoop::CreateThreads:PreMainMessageLoopRun");
 735     parts_->PreMainMessageLoopRun();
 736   }
 737
 738   // If the UI thread blocks, the whole UI is unresponsive.
 739   // Do not allow disk IO from the UI thread.
 740   base::ThreadRestrictions::SetIOAllowed(false);
 741   base::ThreadRestrictions::DisallowWaiting();
 742   return result_code_;
 743 }
 744
 745 void BrowserMainLoop::RunMainMessageLoopParts() {
 746   TRACE_EVENT_BEGIN_ETW("BrowserMain:MESSAGE_LOOP", 0, "");
 747
 748   bool ran_main_loop = false;
 749   if (parts_)
 750     ran_main_loop = parts_->MainMessageLoopRun(&result_code_);
 751
 752   if (!ran_main_loop)
 753     MainMessageLoopRun();
 754
 755   TRACE_EVENT_END_ETW("BrowserMain:MESSAGE_LOOP", 0, "");
 756 }
 757
 758 void BrowserMainLoop::ShutdownThreadsAndCleanUp() {
 759   if (!created_threads_) {
 760     // Called early, nothing to do
 761     return;
 762   }
 763   TRACE_EVENT0("shutdown", "BrowserMainLoop::ShutdownThreadsAndCleanUp");
 764
 765   // Teardown may start in PostMainMessageLoopRun, and during teardown we
 766   // need to be able to perform IO.
 767   base::ThreadRestrictions::SetIOAllowed(true);
 768   BrowserThread::PostTask(
 769       BrowserThread::IO, FROM_HERE,
 770       base::Bind(base::IgnoreResult(&base::ThreadRestrictions::SetIOAllowed),
 771                  true));
 772
 773 #if !defined(OS_IOS)
 774   if (RenderProcessHost::run_renderer_in_process())
 775     RenderProcessHostImpl::ShutDownInProcessRenderer();
 776 #endif
 777
 778   if (parts_) {
 779     TRACE_EVENT0("shutdown",
 780                  "BrowserMainLoop::Subsystem:PostMainMessageLoopRun");
 781     parts_->PostMainMessageLoopRun();
 782   }
 783
 784   trace_memory_controller_.reset();
 785   system_stats_monitor_.reset();
 786
 787 #if !defined(OS_IOS)
 788   // Destroying the GpuProcessHostUIShims on the UI thread posts a task to
 789   // delete related objects on the GPU thread. This must be done before
 790   // stopping the GPU thread. The GPU thread will close IPC channels to renderer
 791   // processes so this has to happen before stopping the IO thread.
 792   {
 793     TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:GPUProcessHostShim");
 794     GpuProcessHostUIShim::DestroyAll();
 795   }
 796   // Cancel pending requests and prevent new requests.
 797   if (resource_dispatcher_host_) {
 798     TRACE_EVENT0("shutdown",
 799                  "BrowserMainLoop::Subsystem:ResourceDispatcherHost");
 800     resource_dispatcher_host_.get()->Shutdown();
 801   }
 802
 803 #if defined(USE_AURA) || defined(OS_MACOSX)
 804   if (ShouldInitializeBrowserGpuChannelAndTransportSurface()) {
 805     TRACE_EVENT0("shutdown",
 806                  "BrowserMainLoop::Subsystem:ImageTransportFactory");
 807     ImageTransportFactory::Terminate();
 808   }
 809 #endif
 810
 811 #if defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
 812   ZygoteHostImpl::GetInstance()->TearDownAfterLastChild();
 813 #endif  // defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
 814
 815   // The device monitors are using |system_monitor_| as dependency, so delete
 816   // them before |system_monitor_| goes away.
 817   // On Mac and windows, the monitor needs to be destroyed on the same thread
 818   // as they were created. On Linux, the monitor will be deleted when IO thread
 819   // goes away.
 820 #if defined(OS_WIN)
 821   system_message_window_.reset();
 822 #elif defined(OS_MACOSX)
 823   device_monitor_mac_.reset();
 824 #endif
 825 #endif  // !defined(OS_IOS)
 826
 827   // Must be size_t so we can subtract from it.
 828   for (size_t thread_id = BrowserThread::ID_COUNT - 1;
 829        thread_id >= (BrowserThread::UI + 1);
 830        --thread_id) {
 831     // Find the thread object we want to stop. Looping over all valid
 832     // BrowserThread IDs and DCHECKing on a missing case in the switch
 833     // statement helps avoid a mismatch between this code and the
 834     // BrowserThread::ID enumeration.
 835     //
 836     // The destruction order is the reverse order of occurrence in the
 837     // BrowserThread::ID list. The rationale for the order is as
 838     // follows (need to be filled in a bit):
 839     //
 840     //
 841     // - The IO thread is the only user of the CACHE thread.
 842     //
 843     // - The PROCESS_LAUNCHER thread must be stopped after IO in case
 844     //   the IO thread posted a task to terminate a process on the
 845     //   process launcher thread.
 846     //
 847     // - (Not sure why DB stops last.)
 848     switch (thread_id) {
 849       case BrowserThread::DB: {
 850         TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:DBThread");
 851         ResetThread_DB(db_thread_.Pass());
 852         break;
 853       }
 854       case BrowserThread::FILE: {
 855         TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:FileThread");
 856 #if !defined(OS_IOS)
 857         // Clean up state that lives on or uses the file_thread_ before
 858         // it goes away.
 859         if (resource_dispatcher_host_)
 860           resource_dispatcher_host_.get()->save_file_manager()->Shutdown();
 861 #endif  // !defined(OS_IOS)
 862         ResetThread_FILE(file_thread_.Pass());
 863         break;
 864       }
 865       case BrowserThread::FILE_USER_BLOCKING: {
 866         TRACE_EVENT0("shutdown",
 867                       "BrowserMainLoop::Subsystem:FileUserBlockingThread");
 868         ResetThread_FILE_USER_BLOCKING(file_user_blocking_thread_.Pass());
 869         break;
 870       }
 871       case BrowserThread::PROCESS_LAUNCHER: {
 872         TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:LauncherThread");
 873         ResetThread_PROCESS_LAUNCHER(process_launcher_thread_.Pass());
 874         break;
 875       }
 876       case BrowserThread::CACHE: {
 877         TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:CacheThread");
 878         ResetThread_CACHE(cache_thread_.Pass());
 879         break;
 880       }
 881       case BrowserThread::IO: {
 882         TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:IOThread");
 883         ResetThread_IO(io_thread_.Pass());
 884         break;
 885       }
 886       case BrowserThread::UI:
 887       case BrowserThread::ID_COUNT:
 888       default:
 889         NOTREACHED();
 890         break;
 891     }
 892   }
 893
 894 #if !defined(OS_IOS)
 895   {
 896     TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:IndexedDBThread");
 897     ResetThread_IndexedDb(indexed_db_thread_.Pass());
 898   }
 899 #endif
 900
 901   // Close the blocking I/O pool after the other threads. Other threads such
 902   // as the I/O thread may need to schedule work like closing files or flushing
 903   // data during shutdown, so the blocking pool needs to be available. There
 904   // may also be slow operations pending that will blcok shutdown, so closing
 905   // it here (which will block until required operations are complete) gives
 906   // more head start for those operations to finish.
 907   {
 908     TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:ThreadPool");
 909     BrowserThreadImpl::ShutdownThreadPool();
 910   }
 911
 912 #if !defined(OS_IOS)
 913   // Must happen after the IO thread is shutdown since this may be accessed from
 914   // it.
 915   {
 916     TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:GPUChannelFactory");
 917     if (BrowserGpuChannelHostFactory::instance())
 918       BrowserGpuChannelHostFactory::Terminate();
 919   }
 920
 921   // Must happen after the I/O thread is shutdown since this class lives on the
 922   // I/O thread and isn't threadsafe.
 923   {
 924     TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:GamepadService");
 925     GamepadService::GetInstance()->Terminate();
 926   }
 927   {
 928     TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:SensorService");
 929     DeviceInertialSensorService::GetInstance()->Shutdown();
 930   }
 931   {
 932     TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:BatteryStatusService");
 933     BatteryStatusService::GetInstance()->Shutdown();
 934   }
 935   {
 936     TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:DeleteDataSources");
 937     URLDataManager::DeleteDataSources();
 938   }
 939 #endif  // !defined(OS_IOS)
 940
 941   if (parts_) {
 942     TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:PostDestroyThreads");
 943     parts_->PostDestroyThreads();
 944   }
 945 }
 946
 947 void BrowserMainLoop::StopStartupTracingTimer() {
 948   startup_trace_timer_.Stop();
 949 }
 950
 951 void BrowserMainLoop::InitializeMainThread() {
 952   TRACE_EVENT0("startup", "BrowserMainLoop::InitializeMainThread");
 953   const char* kThreadName = "CrBrowserMain";
 954   base::PlatformThread::SetName(kThreadName);
 955   if (main_message_loop_)
 956     main_message_loop_->set_thread_name(kThreadName);
 957
 958   // Register the main thread by instantiating it, but don't call any methods.
 959   main_thread_.reset(
 960       new BrowserThreadImpl(BrowserThread::UI, base::MessageLoop::current()));
 961 }
 962
 963 int BrowserMainLoop::BrowserThreadsStarted() {
 964   TRACE_EVENT0("startup", "BrowserMainLoop::BrowserThreadsStarted");
 965
 966 #if !defined(OS_IOS)
 967   indexed_db_thread_.reset(new base::Thread("IndexedDB"));
 968   indexed_db_thread_->Start();
 969 #endif
 970
 971 #if defined(OS_ANDROID)
 972   // Up the priority of anything that touches with display tasks
 973   // (this thread is UI thread, and io_thread_ is for IPCs).
 974   io_thread_->SetPriority(base::kThreadPriority_Display);
 975   base::PlatformThread::SetThreadPriority(
 976       base::PlatformThread::CurrentHandle(),
 977       base::kThreadPriority_Display);
 978 #endif
 979
 980 #if !defined(OS_IOS)
 981   HistogramSynchronizer::GetInstance();
 982
 983   bool initialize_gpu_data_manager = true;
 984 #if defined(OS_ANDROID)
 985   // On Android, GLSurface::InitializeOneOff() must be called before initalizing
 986   // the GpuDataManagerImpl as it uses the GL bindings. crbug.com/326295
 987   if (!gfx::GLSurface::InitializeOneOff()) {
 988     LOG(ERROR) << "GLSurface::InitializeOneOff failed";
 989     initialize_gpu_data_manager = false;
 990   }
 991 #endif
 992
 993   // Initialize the GpuDataManager before we set up the MessageLoops because
 994   // otherwise we'll trigger the assertion about doing IO on the UI thread.
 995   if (initialize_gpu_data_manager)
 996     GpuDataManagerImpl::GetInstance()->Initialize();
 997
 998   bool always_uses_gpu = true;
 999   bool established_gpu_channel = false;
1000 #if defined(USE_AURA) || defined(OS_MACOSX)
1001   if (ShouldInitializeBrowserGpuChannelAndTransportSurface()) {
1002     established_gpu_channel = true;
1003     if (!GpuDataManagerImpl::GetInstance()->CanUseGpuBrowserCompositor()) {
1004       established_gpu_channel = always_uses_gpu = false;
1005     }
1006     BrowserGpuChannelHostFactory::Initialize(established_gpu_channel);
1007     ImageTransportFactory::Initialize();
1008 #if defined(USE_AURA)
1009     if (aura::Env::GetInstance()) {
1010       aura::Env::GetInstance()->set_context_factory(GetContextFactory());
1011     }
1012 #endif
1013   }
1014 #elif defined(OS_ANDROID)
1015   established_gpu_channel = true;
1016   BrowserGpuChannelHostFactory::Initialize(established_gpu_channel);
1017 #endif
1018
1019 #if defined(OS_LINUX) && defined(USE_UDEV)
1020   device_monitor_linux_.reset(new DeviceMonitorLinux());
1021 #elif defined(OS_MACOSX)
1022   device_monitor_mac_.reset(new DeviceMonitorMac());
1023 #endif
1024
1025   // RDH needs the IO thread to be created
1026   {
1027     TRACE_EVENT0("startup",
1028       "BrowserMainLoop::BrowserThreadsStarted:InitResourceDispatcherHost");
1029     resource_dispatcher_host_.reset(new ResourceDispatcherHostImpl());
1030   }
1031
1032   // MediaStreamManager needs the IO thread to be created.
1033   {
1034     TRACE_EVENT0("startup",
1035       "BrowserMainLoop::BrowserThreadsStarted:InitMediaStreamManager");
1036     media_stream_manager_.reset(new MediaStreamManager(audio_manager_.get()));
1037   }
1038
1039   {
1040     TRACE_EVENT0("startup",
1041       "BrowserMainLoop::BrowserThreadsStarted:InitSpeechRecognition");
1042     speech_recognition_manager_.reset(new SpeechRecognitionManagerImpl(
1043         audio_manager_.get(), media_stream_manager_.get()));
1044   }
1045
1046   {
1047     TRACE_EVENT0(
1048         "startup",
1049         "BrowserMainLoop::BrowserThreadsStarted::InitUserInputMonitor");
1050     user_input_monitor_ = media::UserInputMonitor::Create(
1051         io_thread_->message_loop_proxy(), main_thread_->message_loop_proxy());
1052   }
1053
1054   {
1055     TRACE_EVENT0("startup",
1056                  "BrowserMainLoop::BrowserThreadsStarted::TimeZoneMonitor");
1057     time_zone_monitor_ = TimeZoneMonitor::Create();
1058   }
1059
1060   // Alert the clipboard class to which threads are allowed to access the
1061   // clipboard:
1062   std::vector<base::PlatformThreadId> allowed_clipboard_threads;
1063   // The current thread is the UI thread.
1064   allowed_clipboard_threads.push_back(base::PlatformThread::CurrentId());
1065 #if defined(OS_WIN)
1066   // On Windows, clipboards are also used on the File or IO threads.
1067   allowed_clipboard_threads.push_back(file_thread_->thread_id());
1068   allowed_clipboard_threads.push_back(io_thread_->thread_id());
1069 #endif
1070   ui::Clipboard::SetAllowedThreads(allowed_clipboard_threads);
1071
1072   // When running the GPU thread in-process, avoid optimistically starting it
1073   // since creating the GPU thread races against creation of the one-and-only
1074   // ChildProcess instance which is created by the renderer thread.
1075   if (GpuDataManagerImpl::GetInstance()->GpuAccessAllowed(NULL) &&
1076       !established_gpu_channel &&
1077       always_uses_gpu &&
1078       !parsed_command_line_.HasSwitch(switches::kSingleProcess) &&
1079       !parsed_command_line_.HasSwitch(switches::kInProcessGPU)) {
1080     TRACE_EVENT_INSTANT0("gpu", "Post task to launch GPU process",
1081                          TRACE_EVENT_SCOPE_THREAD);
1082     BrowserThread::PostTask(
1083         BrowserThread::IO, FROM_HERE, base::Bind(
1084             base::IgnoreResult(&GpuProcessHost::Get),
1085             GpuProcessHost::GPU_PROCESS_KIND_SANDBOXED,
1086             CAUSE_FOR_GPU_LAUNCH_BROWSER_STARTUP));
1087   }
1088
1089 #if defined(OS_MACOSX)
1090   ThemeHelperMac::GetInstance();
1091   SystemHotkeyHelperMac::GetInstance()->DeferredLoadSystemHotkeys();
1092   if (ShouldEnableBootstrapSandbox()) {
1093     TRACE_EVENT0("startup",
1094         "BrowserMainLoop::BrowserThreadsStarted:BootstrapSandbox");
1095     CHECK(GetBootstrapSandbox());
1096   }
1097 #endif  // defined(OS_MACOSX)
1098
1099 #endif  // !defined(OS_IOS)
1100
1101   return result_code_;
1102 }
1103
1104 bool BrowserMainLoop::InitializeToolkit() {
1105   TRACE_EVENT0("startup", "BrowserMainLoop::InitializeToolkit");
1106   // TODO(evan): this function is rather subtle, due to the variety
1107   // of intersecting ifdefs we have.  To keep it easy to follow, there
1108   // are no #else branches on any #ifs.
1109   // TODO(stevenjb): Move platform specific code into platform specific Parts
1110   // (Need to add InitializeToolkit stage to BrowserParts).
1111   // See also GTK setup in EarlyInitialization, above, and associated comments.
1112
1113 #if defined(OS_WIN)
1114   // Init common control sex.
1115   INITCOMMONCONTROLSEX config;
1116   config.dwSize = sizeof(config);
1117   config.dwICC = ICC_WIN95_CLASSES;
1118   if (!InitCommonControlsEx(&config))
1119     PLOG(FATAL);
1120 #endif
1121
1122 #if defined(USE_AURA)
1123
1124 #if defined(USE_X11)
1125   if (!gfx::GetXDisplay())
1126     return false;
1127 #endif
1128
1129   // Env creates the compositor. Aura widgets need the compositor to be created
1130   // before they can be initialized by the browser.
1131   aura::Env::CreateInstance(true);
1132 #endif  // defined(USE_AURA)
1133
1134   if (parts_)
1135     parts_->ToolkitInitialized();
1136
1137   return true;
1138 }
1139
1140 void BrowserMainLoop::MainMessageLoopRun() {
1141 #if defined(OS_ANDROID)
1142   // Android's main message loop is the Java message loop.
1143   NOTREACHED();
1144 #else
1145   DCHECK(base::MessageLoopForUI::IsCurrent());
1146   if (parameters_.ui_task)
1147     base::MessageLoopForUI::current()->PostTask(FROM_HERE,
1148                                                 *parameters_.ui_task);
1149
1150   base::RunLoop run_loop;
1151   run_loop.Run();
1152 #endif
1153 }
1154
1155 base::FilePath BrowserMainLoop::GetStartupTraceFileName(
1156     const base::CommandLine& command_line) const {
1157   base::FilePath trace_file = command_line.GetSwitchValuePath(
1158       switches::kTraceStartupFile);
1159   // trace_file = "none" means that startup events will show up for the next
1160   // begin/end tracing (via about:tracing or AutomationProxy::BeginTracing/
1161   // EndTracing, for example).
1162   if (trace_file == base::FilePath().AppendASCII("none"))
1163     return trace_file;
1164
1165   if (trace_file.empty()) {
1166 #if defined(OS_ANDROID)
1167     TracingControllerAndroid::GenerateTracingFilePath(&trace_file);
1168 #else
1169     // Default to saving the startup trace into the current dir.
1170     trace_file = base::FilePath().AppendASCII("chrometrace.log");
1171 #endif
1172   }
1173
1174   return trace_file;
1175 }
1176
1177 void BrowserMainLoop::InitStartupTracing(
1178     const base::CommandLine& command_line) {
1179   DCHECK(is_tracing_startup_);
1180
1181   startup_trace_file_ = GetStartupTraceFileName(parsed_command_line_);
1182
1183   std::string delay_str = command_line.GetSwitchValueASCII(
1184       switches::kTraceStartupDuration);
1185   int delay_secs = 5;
1186   if (!delay_str.empty() && !base::StringToInt(delay_str, &delay_secs)) {
1187     DLOG(WARNING) << "Could not parse --" << switches::kTraceStartupDuration
1188         << "=" << delay_str << " defaulting to 5 (secs)";
1189     delay_secs = 5;
1190   }
1191
1192   startup_trace_timer_.Start(FROM_HERE,
1193                              base::TimeDelta::FromSeconds(delay_secs),
1194                              this,
1195                              &BrowserMainLoop::EndStartupTracing);
1196 }
1197
1198 void BrowserMainLoop::EndStartupTracing() {
1199   is_tracing_startup_ = false;
1200   TracingController::GetInstance()->DisableRecording(
1201       TracingController::CreateFileSink(
1202           startup_trace_file_,
1203           base::Bind(OnStoppedStartupTracing, startup_trace_file_)));
1204 }
1205
1206 }  // namespace content