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