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