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/logging.h"
  10 #include "base/message_loop/message_loop.h"
  11 #include "base/metrics/field_trial.h"
  12 #include "base/metrics/histogram.h"
  13 #include "base/pending_task.h"
  14 #include "base/power_monitor/power_monitor.h"
  15 #include "base/power_monitor/power_monitor_device_source.h"
  16 #include "base/process/process_metrics.h"
  17 #include "base/run_loop.h"
  18 #include "base/strings/string_number_conversions.h"
  19 #include "base/system_monitor/system_monitor.h"
  20 #include "base/thread_task_runner_handle.h"
  21 #include "base/threading/thread_restrictions.h"
  22 #include "base/timer/hi_res_timer_manager.h"
  23 #include "base/trace_event/trace_event.h"
  24 #include "content/browser/browser_thread_impl.h"
  25 #include "content/browser/device_sensors/device_inertial_sensor_service.h"
  26 #include "content/browser/download/save_file_manager.h"
  27 #include "content/browser/gamepad/gamepad_service.h"
  28 #include "content/browser/gpu/browser_gpu_channel_host_factory.h"
  29 #include "content/browser/gpu/compositor_util.h"
  30 #include "content/browser/gpu/gpu_data_manager_impl.h"
  31 #include "content/browser/gpu/gpu_process_host.h"
  32 #include "content/browser/gpu/gpu_process_host_ui_shim.h"
  33 #include "content/browser/histogram_synchronizer.h"
  34 #include "content/browser/loader/resource_dispatcher_host_impl.h"
  35 #include "content/browser/media/media_internals.h"
  36 #include "content/browser/net/browser_online_state_observer.h"
  37 #include "content/browser/renderer_host/media/media_stream_manager.h"
  38 #include "content/browser/speech/speech_recognition_manager_impl.h"
  39 #include "content/browser/startup_task_runner.h"
  40 #include "content/browser/time_zone_monitor.h"
  41 #include "content/browser/webui/content_web_ui_controller_factory.h"
  42 #include "content/browser/webui/url_data_manager.h"
  43 #include "content/common/content_switches_internal.h"
  44 #include "content/public/browser/browser_main_parts.h"
  45 #include "content/public/browser/browser_shutdown.h"
  46 #include "content/public/browser/content_browser_client.h"
  47 #include "content/public/browser/render_process_host.h"
  48 #include "content/public/browser/tracing_controller.h"
  49 #include "content/public/common/content_switches.h"
  50 #include "content/public/common/main_function_params.h"
  51 #include "content/public/common/result_codes.h"
  52 #include "crypto/nss_util.h"
  53 #include "device/battery/battery_status_service.h"
  54 #include "media/audio/audio_manager.h"
  55 #include "media/base/media.h"
  56 #include "media/base/user_input_monitor.h"
  57 #include "media/midi/midi_manager.h"
  58 #include "net/base/network_change_notifier.h"
  59 #include "net/socket/client_socket_factory.h"
  60 #include "net/ssl/ssl_config_service.h"
  61 #include "ui/base/clipboard/clipboard.h"
  62
  63 #if defined(USE_AURA) || (defined(OS_MACOSX) && !defined(OS_IOS))
  64 #include "content/browser/compositor/image_transport_factory.h"
  65 #endif
  66
  67 #if defined(USE_AURA)
  68 #include "content/public/browser/context_factory.h"
  69 #include "ui/aura/env.h"
  70 #endif
  71
  72 #if !defined(OS_IOS)
  73 #include "content/browser/renderer_host/render_process_host_impl.h"
  74 #endif
  75
  76 #if defined(OS_ANDROID)
  77 #include "base/android/jni_android.h"
  78 #include "content/browser/android/browser_startup_controller.h"
  79 #include "content/browser/android/browser_surface_texture_manager.h"
  80 #include "content/browser/android/tracing_controller_android.h"
  81 #include "content/browser/screen_orientation/screen_orientation_delegate_android.h"
  82 #include "content/public/browser/screen_orientation_provider.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/compositor/browser_compositor_view_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(OS_CHROMEOS)
 105 #include "base/chromeos/memory_pressure_observer_chromeos.h"
 106 #include "chromeos/chromeos_switches.h"
 107 #endif
 108
 109 #if defined(USE_GLIB)
 110 #include <glib-object.h>
 111 #endif
 112
 113 #if defined(OS_LINUX) && defined(USE_UDEV)
 114 #include "content/browser/device_monitor_udev.h"
 115 #elif defined(OS_MACOSX) && !defined(OS_IOS)
 116 #include "content/browser/device_monitor_mac.h"
 117 #endif
 118
 119 #if defined(OS_POSIX) && !defined(OS_MACOSX)
 120 #include "content/browser/renderer_host/render_sandbox_host_linux.h"
 121 #include "content/browser/zygote_host/zygote_host_impl_linux.h"
 122 #include "sandbox/linux/suid/client/setuid_sandbox_host.h"
 123 #endif
 124
 125 #if defined(ENABLE_PLUGINS)
 126 #include "content/browser/plugin_service_impl.h"
 127 #endif
 128
 129 #if defined(TCMALLOC_TRACE_MEMORY_SUPPORTED)
 130 #include "third_party/tcmalloc/chromium/src/gperftools/heap-profiler.h"
 131 #endif
 132
 133 #if defined(USE_X11)
 134 #include "ui/gfx/x/x11_connection.h"
 135 #include "ui/gfx/x/x11_types.h"
 136 #endif
 137
 138 // One of the linux specific headers defines this as a macro.
 139 #ifdef DestroyAll
 140 #undef DestroyAll
 141 #endif
 142
 143 namespace content {
 144 namespace {
 145
 146 #if defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
 147 void SetupSandbox(const base::CommandLine& parsed_command_line) {
 148   TRACE_EVENT0("startup", "SetupSandbox");
 149   base::FilePath sandbox_binary;
 150
 151   scoped_ptr<sandbox::SetuidSandboxHost> setuid_sandbox_host(
 152       sandbox::SetuidSandboxHost::Create());
 153
 154   const bool want_setuid_sandbox =
 155       !parsed_command_line.HasSwitch(switches::kNoSandbox) &&
 156       !parsed_command_line.HasSwitch(switches::kDisableSetuidSandbox) &&
 157       !setuid_sandbox_host->IsDisabledViaEnvironment();
 158
 159   static const char no_suid_error[] =
 160       "Running without the SUID sandbox! See "
 161       "https://code.google.com/p/chromium/wiki/LinuxSUIDSandboxDevelopment "
 162       "for more information on developing with the sandbox on.";
 163   if (want_setuid_sandbox) {
 164     sandbox_binary = setuid_sandbox_host->GetSandboxBinaryPath();
 165     if (sandbox_binary.empty()) {
 166       // This needs to be fatal. Talk to security@chromium.org if you feel
 167       // otherwise.
 168       LOG(FATAL) << no_suid_error;
 169     }
 170   } else {
 171     LOG(ERROR) << no_suid_error;
 172   }
 173
 174   // Tickle the sandbox host and zygote host so they fork now.
 175   RenderSandboxHostLinux::GetInstance()->Init();
 176   ZygoteHostImpl::GetInstance()->Init(sandbox_binary.value());
 177 }
 178 #endif
 179
 180 #if defined(USE_GLIB)
 181 static void GLibLogHandler(const gchar* log_domain,
 182                            GLogLevelFlags log_level,
 183                            const gchar* message,
 184                            gpointer userdata) {
 185   if (!log_domain)
 186     log_domain = "<unknown>";
 187   if (!message)
 188     message = "<no message>";
 189
 190   if (strstr(message, "Unable to retrieve the file info for")) {
 191     LOG(ERROR) << "GTK File code error: " << message;
 192   } else if (strstr(message, "Could not find the icon") &&
 193              strstr(log_domain, "Gtk")) {
 194     LOG(ERROR) << "GTK icon error: " << message;
 195   } else if (strstr(message, "Theme file for default has no") ||
 196              strstr(message, "Theme directory") ||
 197              strstr(message, "theme pixmap") ||
 198              strstr(message, "locate theme engine")) {
 199     LOG(ERROR) << "GTK theme error: " << message;
 200   } else if (strstr(message, "Unable to create Ubuntu Menu Proxy") &&
 201              strstr(log_domain, "<unknown>")) {
 202     LOG(ERROR) << "GTK menu proxy create failed";
 203   } else if (strstr(message, "Out of memory") &&
 204              strstr(log_domain, "<unknown>")) {
 205     LOG(ERROR) << "DBus call timeout or out of memory: "
 206                << "http://crosbug.com/15496";
 207   } else if (strstr(message, "Could not connect: Connection refused") &&
 208              strstr(log_domain, "<unknown>")) {
 209     LOG(ERROR) << "DConf settings backend could not connect to session bus: "
 210                << "http://crbug.com/179797";
 211   } else if (strstr(message, "Attempting to store changes into") ||
 212              strstr(message, "Attempting to set the permissions of")) {
 213     LOG(ERROR) << message << " (http://bugs.chromium.org/161366)";
 214   } else if (strstr(message, "drawable is not a native X11 window")) {
 215     LOG(ERROR) << message << " (http://bugs.chromium.org/329991)";
 216   } else {
 217     LOG(DFATAL) << log_domain << ": " << message;
 218   }
 219 }
 220
 221 static void SetUpGLibLogHandler() {
 222   // Register GLib-handled assertions to go through our logging system.
 223   const char* kLogDomains[] = { NULL, "Gtk", "Gdk", "GLib", "GLib-GObject" };
 224   for (size_t i = 0; i < arraysize(kLogDomains); i++) {
 225     g_log_set_handler(kLogDomains[i],
 226                       static_cast<GLogLevelFlags>(G_LOG_FLAG_RECURSION |
 227                                                   G_LOG_FLAG_FATAL |
 228                                                   G_LOG_LEVEL_ERROR |
 229                                                   G_LOG_LEVEL_CRITICAL |
 230                                                   G_LOG_LEVEL_WARNING),
 231                       GLibLogHandler,
 232                       NULL);
 233   }
 234 }
 235 #endif
 236
 237 void OnStoppedStartupTracing(const base::FilePath& trace_file) {
 238   VLOG(0) << "Completed startup tracing to " << trace_file.value();
 239 }
 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   volatile int inhibit_comdat = __LINE__;
 249   ALLOW_UNUSED_LOCAL(inhibit_comdat);
 250   thread.reset();
 251 }
 252
 253 NOINLINE void ResetThread_FILE(scoped_ptr<BrowserProcessSubThread> thread) {
 254   volatile int inhibit_comdat = __LINE__;
 255   ALLOW_UNUSED_LOCAL(inhibit_comdat);
 256   thread.reset();
 257 }
 258
 259 NOINLINE void ResetThread_FILE_USER_BLOCKING(
 260     scoped_ptr<BrowserProcessSubThread> thread) {
 261   volatile int inhibit_comdat = __LINE__;
 262   ALLOW_UNUSED_LOCAL(inhibit_comdat);
 263   thread.reset();
 264 }
 265
 266 NOINLINE void ResetThread_PROCESS_LAUNCHER(
 267     scoped_ptr<BrowserProcessSubThread> thread) {
 268   volatile int inhibit_comdat = __LINE__;
 269   ALLOW_UNUSED_LOCAL(inhibit_comdat);
 270   thread.reset();
 271 }
 272
 273 NOINLINE void ResetThread_CACHE(scoped_ptr<BrowserProcessSubThread> thread) {
 274   volatile int inhibit_comdat = __LINE__;
 275   ALLOW_UNUSED_LOCAL(inhibit_comdat);
 276   thread.reset();
 277 }
 278
 279 NOINLINE void ResetThread_IO(scoped_ptr<BrowserProcessSubThread> thread) {
 280   volatile int inhibit_comdat = __LINE__;
 281   ALLOW_UNUSED_LOCAL(inhibit_comdat);
 282   thread.reset();
 283 }
 284
 285 #if !defined(OS_IOS)
 286 NOINLINE void ResetThread_IndexedDb(scoped_ptr<base::Thread> thread) {
 287   volatile int inhibit_comdat = __LINE__;
 288   ALLOW_UNUSED_LOCAL(inhibit_comdat);
 289   thread.reset();
 290 }
 291 #endif
 292
 293 MSVC_POP_WARNING()
 294 MSVC_ENABLE_OPTIMIZE();
 295
 296 }  // namespace
 297
 298 // The currently-running BrowserMainLoop.  There can be one or zero.
 299 BrowserMainLoop* g_current_browser_main_loop = NULL;
 300
 301 // This is just to be able to keep ShutdownThreadsAndCleanUp out of
 302 // the public interface of BrowserMainLoop.
 303 class BrowserShutdownImpl {
 304  public:
 305   static void ImmediateShutdownAndExitProcess() {
 306     DCHECK(g_current_browser_main_loop);
 307     g_current_browser_main_loop->ShutdownThreadsAndCleanUp();
 308
 309 #if defined(OS_WIN)
 310     // At this point the message loop is still running yet we've shut everything
 311     // down. If any messages are processed we'll likely crash. Exit now.
 312     ExitProcess(RESULT_CODE_NORMAL_EXIT);
 313 #elif defined(OS_POSIX) && !defined(OS_MACOSX)
 314     _exit(RESULT_CODE_NORMAL_EXIT);
 315 #else
 316     NOTIMPLEMENTED();
 317 #endif
 318   }
 319 };
 320
 321 void ImmediateShutdownAndExitProcess() {
 322   BrowserShutdownImpl::ImmediateShutdownAndExitProcess();
 323 }
 324
 325 // For measuring memory usage after each task. Behind a command line flag.
 326 class BrowserMainLoop::MemoryObserver : public base::MessageLoop::TaskObserver {
 327  public:
 328   MemoryObserver() {}
 329   ~MemoryObserver() override {}
 330
 331   void WillProcessTask(const base::PendingTask& pending_task) override {}
 332
 333   void DidProcessTask(const base::PendingTask& pending_task) override {
 334 #if !defined(OS_IOS)  // No ProcessMetrics on IOS.
 335     scoped_ptr<base::ProcessMetrics> process_metrics(
 336         base::ProcessMetrics::CreateProcessMetrics(
 337 #if defined(OS_MACOSX)
 338             base::GetCurrentProcessHandle(), NULL));
 339 #else
 340             base::GetCurrentProcessHandle()));
 341 #endif
 342     size_t private_bytes;
 343     process_metrics->GetMemoryBytes(&private_bytes, NULL);
 344     LOCAL_HISTOGRAM_MEMORY_KB("Memory.BrowserUsed", private_bytes >> 10);
 345 #endif
 346   }
 347  private:
 348   DISALLOW_COPY_AND_ASSIGN(MemoryObserver);
 349 };
 350
 351
 352 // BrowserMainLoop construction / destruction =============================
 353
 354 BrowserMainLoop* BrowserMainLoop::GetInstance() {
 355   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 356   return g_current_browser_main_loop;
 357 }
 358
 359 BrowserMainLoop::BrowserMainLoop(const MainFunctionParams& parameters)
 360     : parameters_(parameters),
 361       parsed_command_line_(parameters.command_line),
 362       result_code_(RESULT_CODE_NORMAL_EXIT),
 363       created_threads_(false),
 364       // ContentMainRunner should have enabled tracing of the browser process
 365       // when kTraceStartup is in the command line.
 366       is_tracing_startup_(
 367           parameters.command_line.HasSwitch(switches::kTraceStartup)) {
 368   DCHECK(!g_current_browser_main_loop);
 369   g_current_browser_main_loop = this;
 370 }
 371
 372 BrowserMainLoop::~BrowserMainLoop() {
 373   DCHECK_EQ(this, g_current_browser_main_loop);
 374 #if !defined(OS_IOS)
 375   ui::Clipboard::DestroyClipboardForCurrentThread();
 376 #endif  // !defined(OS_IOS)
 377   g_current_browser_main_loop = NULL;
 378 }
 379
 380 void BrowserMainLoop::Init() {
 381   TRACE_EVENT0("startup", "BrowserMainLoop::Init");
 382   parts_.reset(
 383       GetContentClient()->browser()->CreateBrowserMainParts(parameters_));
 384 }
 385
 386 // BrowserMainLoop stages ==================================================
 387
 388 void BrowserMainLoop::EarlyInitialization() {
 389   TRACE_EVENT0("startup", "BrowserMainLoop::EarlyInitialization");
 390
 391 #if defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
 392   // No thread should be created before this call, as SetupSandbox()
 393   // will end-up using fork().
 394   SetupSandbox(parsed_command_line_);
 395 #endif
 396
 397 #if defined(USE_X11)
 398   if (UsingInProcessGpu()) {
 399     if (!gfx::InitializeThreadedX11()) {
 400       LOG(ERROR) << "Failed to put Xlib into threaded mode.";
 401     }
 402   }
 403 #endif
 404
 405   // GLib's spawning of new processes is buggy, so it's important that at this
 406   // point GLib does not need to start DBUS. Chrome should always start with
 407   // DBUS_SESSION_BUS_ADDRESS properly set. See crbug.com/309093.
 408 #if defined(USE_GLIB)
 409   // g_type_init will be deprecated in 2.36. 2.35 is the development
 410   // version for 2.36, hence do not call g_type_init starting 2.35.
 411   // http://developer.gnome.org/gobject/unstable/gobject-Type-Information.html#g-type-init
 412 #if !GLIB_CHECK_VERSION(2, 35, 0)
 413   // GLib type system initialization. Needed at least for gconf,
 414   // used in net/proxy/proxy_config_service_linux.cc. Most likely
 415   // this is superfluous as gtk_init() ought to do this. It's
 416   // definitely harmless, so retained as a reminder of this
 417   // requirement for gconf.
 418   g_type_init();
 419 #endif
 420
 421   SetUpGLibLogHandler();
 422 #endif
 423
 424   if (parts_)
 425     parts_->PreEarlyInitialization();
 426
 427 #if defined(OS_MACOSX)
 428   // We use quite a few file descriptors for our IPC, and the default limit on
 429   // the Mac is low (256), so bump it up.
 430   base::SetFdLimit(1024);
 431 #endif
 432
 433 #if defined(OS_WIN)
 434   net::EnsureWinsockInit();
 435 #endif
 436
 437 #if !defined(USE_OPENSSL)
 438   // We want to be sure to init NSPR on the main thread.
 439   crypto::EnsureNSPRInit();
 440 #endif  // !defined(USE_OPENSSL)
 441
 442 #if !defined(OS_IOS)
 443   if (parsed_command_line_.HasSwitch(switches::kRendererProcessLimit)) {
 444     std::string limit_string = parsed_command_line_.GetSwitchValueASCII(
 445         switches::kRendererProcessLimit);
 446     size_t process_limit;
 447     if (base::StringToSizeT(limit_string, &process_limit)) {
 448       RenderProcessHost::SetMaxRendererProcessCount(process_limit);
 449     }
 450   }
 451 #endif  // !defined(OS_IOS)
 452
 453   if (parsed_command_line_.HasSwitch(switches::kEnableNativeGpuMemoryBuffers)) {
 454     BrowserGpuChannelHostFactory::EnableGpuMemoryBufferFactoryUsage(
 455         gfx::GpuMemoryBuffer::MAP);
 456   }
 457
 458 #if defined(USE_OZONE)
 459   BrowserGpuChannelHostFactory::EnableGpuMemoryBufferFactoryUsage(
 460       gfx::GpuMemoryBuffer::SCANOUT);
 461 #endif
 462
 463   if (parts_)
 464     parts_->PostEarlyInitialization();
 465 }
 466
 467 void BrowserMainLoop::MainMessageLoopStart() {
 468   TRACE_EVENT0("startup", "BrowserMainLoop::MainMessageLoopStart");
 469   if (parts_) {
 470     TRACE_EVENT0("startup",
 471         "BrowserMainLoop::MainMessageLoopStart:PreMainMessageLoopStart");
 472     parts_->PreMainMessageLoopStart();
 473   }
 474
 475 #if defined(OS_WIN)
 476   // If we're running tests (ui_task is non-null), then the ResourceBundle
 477   // has already been initialized.
 478   if (!parameters_.ui_task) {
 479     // Override the configured locale with the user's preferred UI language.
 480     l10n_util::OverrideLocaleWithUILanguageList();
 481   }
 482 #endif
 483
 484   // Create a MessageLoop if one does not already exist for the current thread.
 485   if (!base::MessageLoop::current())
 486     main_message_loop_.reset(new base::MessageLoopForUI);
 487
 488   InitializeMainThread();
 489
 490   {
 491     TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:SystemMonitor");
 492     system_monitor_.reset(new base::SystemMonitor);
 493   }
 494   {
 495     TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:PowerMonitor");
 496     scoped_ptr<base::PowerMonitorSource> power_monitor_source(
 497       new base::PowerMonitorDeviceSource());
 498     power_monitor_.reset(new base::PowerMonitor(power_monitor_source.Pass()));
 499   }
 500   {
 501     TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:HighResTimerManager");
 502     hi_res_timer_manager_.reset(new base::HighResolutionTimerManager);
 503   }
 504   {
 505     TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:NetworkChangeNotifier");
 506     network_change_notifier_.reset(net::NetworkChangeNotifier::Create());
 507   }
 508
 509 #if !defined(OS_IOS)
 510   {
 511     TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:MediaFeatures");
 512     media::InitializeCPUSpecificMediaFeatures();
 513   }
 514   {
 515     TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:AudioMan");
 516     audio_manager_.reset(media::AudioManager::Create(
 517         MediaInternals::GetInstance()));
 518   }
 519   {
 520     TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:MidiManager");
 521     midi_manager_.reset(media::MidiManager::Create());
 522   }
 523   {
 524     TRACE_EVENT0("startup",
 525                  "BrowserMainLoop::Subsystem:ContentWebUIController");
 526     WebUIControllerFactory::RegisterFactory(
 527         ContentWebUIControllerFactory::GetInstance());
 528   }
 529
 530   {
 531     TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:OnlineStateObserver");
 532     online_state_observer_.reset(new BrowserOnlineStateObserver);
 533   }
 534
 535   {
 536     system_stats_monitor_.reset(
 537         new base::trace_event::TraceEventSystemStatsMonitor(
 538             base::ThreadTaskRunnerHandle::Get()));
 539   }
 540 #endif  // !defined(OS_IOS)
 541
 542 #if defined(OS_WIN)
 543   system_message_window_.reset(new SystemMessageWindowWin);
 544 #endif
 545
 546   if (parts_)
 547     parts_->PostMainMessageLoopStart();
 548
 549 #if !defined(OS_IOS)
 550   // Start tracing to a file if needed. Only do this after starting the main
 551   // message loop to avoid calling MessagePumpForUI::ScheduleWork() before
 552   // MessagePumpForUI::Start() as it will crash the browser.
 553   if (is_tracing_startup_) {
 554     TRACE_EVENT0("startup", "BrowserMainLoop::InitStartupTracing");
 555     InitStartupTracing(parsed_command_line_);
 556   }
 557 #endif  // !defined(OS_IOS)
 558
 559 #if defined(OS_ANDROID)
 560   {
 561     TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:SurfaceTextureManager");
 562     SurfaceTextureManager::InitInstance(new BrowserSurfaceTextureManager);
 563   }
 564
 565   {
 566     TRACE_EVENT0("startup",
 567                  "BrowserMainLoop::Subsystem:ScreenOrientationProvider");
 568     screen_orientation_delegate_.reset(
 569         new ScreenOrientationDelegateAndroid());
 570     ScreenOrientationProvider::SetDelegate(screen_orientation_delegate_.get());
 571   }
 572 #endif
 573
 574   if (parsed_command_line_.HasSwitch(switches::kMemoryMetrics)) {
 575     TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:MemoryObserver");
 576     memory_observer_.reset(new MemoryObserver());
 577     base::MessageLoop::current()->AddTaskObserver(memory_observer_.get());
 578   }
 579
 580 #if defined(TCMALLOC_TRACE_MEMORY_SUPPORTED)
 581   trace_memory_controller_.reset(new base::trace_event::TraceMemoryController(
 582       base::MessageLoop::current()->message_loop_proxy(),
 583       ::HeapProfilerWithPseudoStackStart, ::HeapProfilerStop,
 584       ::GetHeapProfile));
 585 #endif
 586 }
 587
 588 int BrowserMainLoop::PreCreateThreads() {
 589   if (parts_) {
 590     TRACE_EVENT0("startup",
 591         "BrowserMainLoop::CreateThreads:PreCreateThreads");
 592     result_code_ = parts_->PreCreateThreads();
 593   }
 594
 595 #if defined(OS_CHROMEOS)
 596   if (chromeos::switches::MemoryPressureHandlingEnabled()) {
 597     memory_pressure_observer_.reset(new base::MemoryPressureObserverChromeOS(
 598         chromeos::switches::GetMemoryPressureThresholds()));
 599   }
 600 #endif
 601
 602 #if defined(ENABLE_PLUGINS)
 603   // Prior to any processing happening on the io thread, we create the
 604   // plugin service as it is predominantly used from the io thread,
 605   // but must be created on the main thread. The service ctor is
 606   // inexpensive and does not invoke the io_thread() accessor.
 607   {
 608     TRACE_EVENT0("startup", "BrowserMainLoop::CreateThreads:PluginService");
 609     PluginService::GetInstance()->Init();
 610   }
 611 #endif
 612
 613 #if !defined(OS_IOS) && (!defined(GOOGLE_CHROME_BUILD) || defined(OS_ANDROID))
 614   // Single-process is an unsupported and not fully tested mode, so
 615   // don't enable it for official Chrome builds (except on Android).
 616   if (parsed_command_line_.HasSwitch(switches::kSingleProcess))
 617     RenderProcessHost::SetRunRendererInProcess(true);
 618 #endif
 619
 620   // Need to initialize in-process GpuDataManager before creating threads.
 621   // It's unsafe to append the gpu command line switches to the global
 622   // CommandLine::ForCurrentProcess object after threads are created.
 623   if (UsingInProcessGpu()) {
 624     bool initialize_gpu_data_manager = true;
 625 #if defined(OS_ANDROID)
 626     if (!gfx::GLSurface::InitializeOneOff()) {
 627       // Single-process Android WebView supports no gpu.
 628       LOG(ERROR) << "GLSurface::InitializeOneOff failed";
 629       initialize_gpu_data_manager = false;
 630     }
 631 #endif
 632
 633     // Initialize the GpuDataManager before we set up the MessageLoops because
 634     // otherwise we'll trigger the assertion about doing IO on the UI thread.
 635     if (initialize_gpu_data_manager)
 636       GpuDataManagerImpl::GetInstance()->Initialize();
 637   }
 638
 639   return result_code_;
 640 }
 641
 642 void BrowserMainLoop::CreateStartupTasks() {
 643   TRACE_EVENT0("startup", "BrowserMainLoop::CreateStartupTasks");
 644
 645   // First time through, we really want to create all the tasks
 646   if (!startup_task_runner_.get()) {
 647 #if defined(OS_ANDROID)
 648     startup_task_runner_ = make_scoped_ptr(new StartupTaskRunner(
 649         base::Bind(&BrowserStartupComplete),
 650         base::MessageLoop::current()->message_loop_proxy()));
 651 #else
 652     startup_task_runner_ = make_scoped_ptr(new StartupTaskRunner(
 653         base::Callback<void(int)>(),
 654         base::MessageLoop::current()->message_loop_proxy()));
 655 #endif
 656     StartupTask pre_create_threads =
 657         base::Bind(&BrowserMainLoop::PreCreateThreads, base::Unretained(this));
 658     startup_task_runner_->AddTask(pre_create_threads);
 659
 660     StartupTask create_threads =
 661         base::Bind(&BrowserMainLoop::CreateThreads, base::Unretained(this));
 662     startup_task_runner_->AddTask(create_threads);
 663
 664     StartupTask browser_thread_started = base::Bind(
 665         &BrowserMainLoop::BrowserThreadsStarted, base::Unretained(this));
 666     startup_task_runner_->AddTask(browser_thread_started);
 667
 668     StartupTask pre_main_message_loop_run = base::Bind(
 669         &BrowserMainLoop::PreMainMessageLoopRun, base::Unretained(this));
 670     startup_task_runner_->AddTask(pre_main_message_loop_run);
 671
 672 #if defined(OS_ANDROID)
 673     if (BrowserMayStartAsynchronously()) {
 674       startup_task_runner_->StartRunningTasksAsync();
 675     }
 676 #endif
 677   }
 678 #if defined(OS_ANDROID)
 679   if (!BrowserMayStartAsynchronously()) {
 680     // A second request for asynchronous startup can be ignored, so
 681     // StartupRunningTasksAsync is only called first time through. If, however,
 682     // this is a request for synchronous startup then it must override any
 683     // previous call for async startup, so we call RunAllTasksNow()
 684     // unconditionally.
 685     startup_task_runner_->RunAllTasksNow();
 686   }
 687 #else
 688   startup_task_runner_->RunAllTasksNow();
 689 #endif
 690 }
 691
 692 int BrowserMainLoop::CreateThreads() {
 693   TRACE_EVENT0("startup", "BrowserMainLoop::CreateThreads");
 694
 695   base::Thread::Options io_message_loop_options;
 696   io_message_loop_options.message_loop_type = base::MessageLoop::TYPE_IO;
 697   base::Thread::Options ui_message_loop_options;
 698   ui_message_loop_options.message_loop_type = base::MessageLoop::TYPE_UI;
 699
 700   // Start threads in the order they occur in the BrowserThread::ID
 701   // enumeration, except for BrowserThread::UI which is the main
 702   // thread.
 703   //
 704   // Must be size_t so we can increment it.
 705   for (size_t thread_id = BrowserThread::UI + 1;
 706        thread_id < BrowserThread::ID_COUNT;
 707        ++thread_id) {
 708     scoped_ptr<BrowserProcessSubThread>* thread_to_start = NULL;
 709     base::Thread::Options options;
 710
 711     switch (thread_id) {
 712       case BrowserThread::DB:
 713         TRACE_EVENT_BEGIN1("startup",
 714             "BrowserMainLoop::CreateThreads:start",
 715             "Thread", "BrowserThread::DB");
 716         thread_to_start = &db_thread_;
 717         options.timer_slack = base::TIMER_SLACK_MAXIMUM;
 718         break;
 719       case BrowserThread::FILE_USER_BLOCKING:
 720         TRACE_EVENT_BEGIN1("startup",
 721             "BrowserMainLoop::CreateThreads:start",
 722             "Thread", "BrowserThread::FILE_USER_BLOCKING");
 723         thread_to_start = &file_user_blocking_thread_;
 724         break;
 725       case BrowserThread::FILE:
 726         TRACE_EVENT_BEGIN1("startup",
 727             "BrowserMainLoop::CreateThreads:start",
 728             "Thread", "BrowserThread::FILE");
 729         thread_to_start = &file_thread_;
 730 #if defined(OS_WIN)
 731         // On Windows, the FILE thread needs to be have a UI message loop
 732         // which pumps messages in such a way that Google Update can
 733         // communicate back to us.
 734         options = ui_message_loop_options;
 735 #else
 736         options = io_message_loop_options;
 737 #endif
 738         options.timer_slack = base::TIMER_SLACK_MAXIMUM;
 739         break;
 740       case BrowserThread::PROCESS_LAUNCHER:
 741         TRACE_EVENT_BEGIN1("startup",
 742             "BrowserMainLoop::CreateThreads:start",
 743             "Thread", "BrowserThread::PROCESS_LAUNCHER");
 744         thread_to_start = &process_launcher_thread_;
 745         options.timer_slack = base::TIMER_SLACK_MAXIMUM;
 746         break;
 747       case BrowserThread::CACHE:
 748         TRACE_EVENT_BEGIN1("startup",
 749             "BrowserMainLoop::CreateThreads:start",
 750             "Thread", "BrowserThread::CACHE");
 751         thread_to_start = &cache_thread_;
 752         options = io_message_loop_options;
 753         options.timer_slack = base::TIMER_SLACK_MAXIMUM;
 754         break;
 755       case BrowserThread::IO:
 756         TRACE_EVENT_BEGIN1("startup",
 757             "BrowserMainLoop::CreateThreads:start",
 758             "Thread", "BrowserThread::IO");
 759         thread_to_start = &io_thread_;
 760         options = io_message_loop_options;
 761         break;
 762       case BrowserThread::UI:
 763       case BrowserThread::ID_COUNT:
 764       default:
 765         NOTREACHED();
 766         break;
 767     }
 768
 769     BrowserThread::ID id = static_cast<BrowserThread::ID>(thread_id);
 770
 771     if (thread_to_start) {
 772       (*thread_to_start).reset(new BrowserProcessSubThread(id));
 773       if (!(*thread_to_start)->StartWithOptions(options)) {
 774         LOG(FATAL) << "Failed to start the browser thread: id == " << id;
 775       }
 776     } else {
 777       NOTREACHED();
 778     }
 779
 780     TRACE_EVENT_END0("startup", "BrowserMainLoop::CreateThreads:start");
 781   }
 782   created_threads_ = true;
 783   return result_code_;
 784 }
 785
 786 int BrowserMainLoop::PreMainMessageLoopRun() {
 787   if (parts_) {
 788     TRACE_EVENT0("startup",
 789         "BrowserMainLoop::CreateThreads:PreMainMessageLoopRun");
 790     parts_->PreMainMessageLoopRun();
 791   }
 792
 793   // If the UI thread blocks, the whole UI is unresponsive.
 794   // Do not allow disk IO from the UI thread.
 795   base::ThreadRestrictions::SetIOAllowed(false);
 796   base::ThreadRestrictions::DisallowWaiting();
 797   return result_code_;
 798 }
 799
 800 void BrowserMainLoop::RunMainMessageLoopParts() {
 801   TRACE_EVENT_BEGIN_ETW("BrowserMain:MESSAGE_LOOP", 0, "");
 802
 803   bool ran_main_loop = false;
 804   if (parts_)
 805     ran_main_loop = parts_->MainMessageLoopRun(&result_code_);
 806
 807   if (!ran_main_loop)
 808     MainMessageLoopRun();
 809
 810   TRACE_EVENT_END_ETW("BrowserMain:MESSAGE_LOOP", 0, "");
 811 }
 812
 813 void BrowserMainLoop::ShutdownThreadsAndCleanUp() {
 814   if (!created_threads_) {
 815     // Called early, nothing to do
 816     return;
 817   }
 818   TRACE_EVENT0("shutdown", "BrowserMainLoop::ShutdownThreadsAndCleanUp");
 819
 820   // Teardown may start in PostMainMessageLoopRun, and during teardown we
 821   // need to be able to perform IO.
 822   base::ThreadRestrictions::SetIOAllowed(true);
 823   BrowserThread::PostTask(
 824       BrowserThread::IO, FROM_HERE,
 825       base::Bind(base::IgnoreResult(&base::ThreadRestrictions::SetIOAllowed),
 826                  true));
 827
 828 #if !defined(OS_IOS)
 829   if (RenderProcessHost::run_renderer_in_process())
 830     RenderProcessHostImpl::ShutDownInProcessRenderer();
 831 #endif
 832
 833   if (parts_) {
 834     TRACE_EVENT0("shutdown",
 835                  "BrowserMainLoop::Subsystem:PostMainMessageLoopRun");
 836     parts_->PostMainMessageLoopRun();
 837   }
 838
 839   trace_memory_controller_.reset();
 840   system_stats_monitor_.reset();
 841
 842 #if !defined(OS_IOS)
 843   // Destroying the GpuProcessHostUIShims on the UI thread posts a task to
 844   // delete related objects on the GPU thread. This must be done before
 845   // stopping the GPU thread. The GPU thread will close IPC channels to renderer
 846   // processes so this has to happen before stopping the IO thread.
 847   {
 848     TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:GPUProcessHostShim");
 849     GpuProcessHostUIShim::DestroyAll();
 850   }
 851   // Cancel pending requests and prevent new requests.
 852   if (resource_dispatcher_host_) {
 853     TRACE_EVENT0("shutdown",
 854                  "BrowserMainLoop::Subsystem:ResourceDispatcherHost");
 855     resource_dispatcher_host_.get()->Shutdown();
 856   }
 857
 858 #if defined(OS_CHROMEOS)
 859   memory_pressure_observer_.reset();
 860 #endif
 861
 862 #if defined(OS_MACOSX)
 863   BrowserCompositorMac::DisableRecyclingForShutdown();
 864 #endif
 865
 866 #if defined(USE_AURA) || defined(OS_MACOSX)
 867   {
 868     TRACE_EVENT0("shutdown",
 869                  "BrowserMainLoop::Subsystem:ImageTransportFactory");
 870     ImageTransportFactory::Terminate();
 871   }
 872 #endif
 873
 874 #if defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
 875   ZygoteHostImpl::GetInstance()->TearDownAfterLastChild();
 876 #endif  // defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
 877
 878   // The device monitors are using |system_monitor_| as dependency, so delete
 879   // them before |system_monitor_| goes away.
 880   // On Mac and windows, the monitor needs to be destroyed on the same thread
 881   // as they were created. On Linux, the monitor will be deleted when IO thread
 882   // goes away.
 883 #if defined(OS_WIN)
 884   system_message_window_.reset();
 885 #elif defined(OS_MACOSX)
 886   device_monitor_mac_.reset();
 887 #endif
 888 #endif  // !defined(OS_IOS)
 889
 890   // Must be size_t so we can subtract from it.
 891   for (size_t thread_id = BrowserThread::ID_COUNT - 1;
 892        thread_id >= (BrowserThread::UI + 1);
 893        --thread_id) {
 894     // Find the thread object we want to stop. Looping over all valid
 895     // BrowserThread IDs and DCHECKing on a missing case in the switch
 896     // statement helps avoid a mismatch between this code and the
 897     // BrowserThread::ID enumeration.
 898     //
 899     // The destruction order is the reverse order of occurrence in the
 900     // BrowserThread::ID list. The rationale for the order is as
 901     // follows (need to be filled in a bit):
 902     //
 903     //
 904     // - The IO thread is the only user of the CACHE thread.
 905     //
 906     // - The PROCESS_LAUNCHER thread must be stopped after IO in case
 907     //   the IO thread posted a task to terminate a process on the
 908     //   process launcher thread.
 909     //
 910     // - (Not sure why DB stops last.)
 911     switch (thread_id) {
 912       case BrowserThread::DB: {
 913         TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:DBThread");
 914         ResetThread_DB(db_thread_.Pass());
 915         break;
 916       }
 917       case BrowserThread::FILE: {
 918         TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:FileThread");
 919 #if !defined(OS_IOS)
 920         // Clean up state that lives on or uses the file_thread_ before
 921         // it goes away.
 922         if (resource_dispatcher_host_)
 923           resource_dispatcher_host_.get()->save_file_manager()->Shutdown();
 924 #endif  // !defined(OS_IOS)
 925         ResetThread_FILE(file_thread_.Pass());
 926         break;
 927       }
 928       case BrowserThread::FILE_USER_BLOCKING: {
 929         TRACE_EVENT0("shutdown",
 930                       "BrowserMainLoop::Subsystem:FileUserBlockingThread");
 931         ResetThread_FILE_USER_BLOCKING(file_user_blocking_thread_.Pass());
 932         break;
 933       }
 934       case BrowserThread::PROCESS_LAUNCHER: {
 935         TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:LauncherThread");
 936         ResetThread_PROCESS_LAUNCHER(process_launcher_thread_.Pass());
 937         break;
 938       }
 939       case BrowserThread::CACHE: {
 940         TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:CacheThread");
 941         ResetThread_CACHE(cache_thread_.Pass());
 942         break;
 943       }
 944       case BrowserThread::IO: {
 945         TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:IOThread");
 946         ResetThread_IO(io_thread_.Pass());
 947         break;
 948       }
 949       case BrowserThread::UI:
 950       case BrowserThread::ID_COUNT:
 951       default:
 952         NOTREACHED();
 953         break;
 954     }
 955   }
 956
 957 #if !defined(OS_IOS)
 958   {
 959     TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:IndexedDBThread");
 960     ResetThread_IndexedDb(indexed_db_thread_.Pass());
 961   }
 962 #endif
 963
 964   // Close the blocking I/O pool after the other threads. Other threads such
 965   // as the I/O thread may need to schedule work like closing files or flushing
 966   // data during shutdown, so the blocking pool needs to be available. There
 967   // may also be slow operations pending that will blcok shutdown, so closing
 968   // it here (which will block until required operations are complete) gives
 969   // more head start for those operations to finish.
 970   {
 971     TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:ThreadPool");
 972     BrowserThreadImpl::ShutdownThreadPool();
 973   }
 974
 975 #if !defined(OS_IOS)
 976   // Must happen after the IO thread is shutdown since this may be accessed from
 977   // it.
 978   {
 979     TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:GPUChannelFactory");
 980     if (BrowserGpuChannelHostFactory::instance())
 981       BrowserGpuChannelHostFactory::Terminate();
 982   }
 983
 984   // Must happen after the I/O thread is shutdown since this class lives on the
 985   // I/O thread and isn't threadsafe.
 986   {
 987     TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:GamepadService");
 988     GamepadService::GetInstance()->Terminate();
 989   }
 990   {
 991     TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:SensorService");
 992     DeviceInertialSensorService::GetInstance()->Shutdown();
 993   }
 994   {
 995     TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:BatteryStatusService");
 996     device::BatteryStatusService::GetInstance()->Shutdown();
 997   }
 998   {
 999     TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:DeleteDataSources");
1000     URLDataManager::DeleteDataSources();
1001   }
1002 #endif  // !defined(OS_IOS)
1003
1004   if (parts_) {
1005     TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:PostDestroyThreads");
1006     parts_->PostDestroyThreads();
1007   }
1008 }
1009
1010 void BrowserMainLoop::StopStartupTracingTimer() {
1011   startup_trace_timer_.Stop();
1012 }
1013
1014 void BrowserMainLoop::InitializeMainThread() {
1015   TRACE_EVENT0("startup", "BrowserMainLoop::InitializeMainThread");
1016   const char* kThreadName = "CrBrowserMain";
1017   base::PlatformThread::SetName(kThreadName);
1018   if (main_message_loop_)
1019     main_message_loop_->set_thread_name(kThreadName);
1020
1021   // Register the main thread by instantiating it, but don't call any methods.
1022   main_thread_.reset(
1023       new BrowserThreadImpl(BrowserThread::UI, base::MessageLoop::current()));
1024 }
1025
1026 int BrowserMainLoop::BrowserThreadsStarted() {
1027   TRACE_EVENT0("startup", "BrowserMainLoop::BrowserThreadsStarted");
1028
1029 #if !defined(OS_IOS)
1030   indexed_db_thread_.reset(new base::Thread("IndexedDB"));
1031   indexed_db_thread_->Start();
1032 #endif
1033
1034 #if !defined(OS_IOS)
1035   HistogramSynchronizer::GetInstance();
1036
1037
1038   // GpuDataManager for in-process initialized in PreCreateThreads.
1039   bool initialize_gpu_data_manager = !UsingInProcessGpu();
1040 #if defined(OS_ANDROID)
1041   // Up the priority of anything that touches with display tasks
1042   // (this thread is UI thread, and io_thread_ is for IPCs).
1043   io_thread_->SetPriority(base::kThreadPriority_Display);
1044   base::PlatformThread::SetThreadPriority(
1045       base::PlatformThread::CurrentHandle(),
1046       base::kThreadPriority_Display);
1047
1048   // On Android, GLSurface::InitializeOneOff() must be called before
1049   // initalizing the GpuDataManagerImpl as it uses the GL bindings.
1050   // TODO(sievers): Shouldn't need to init full bindings to determine GL
1051   // version/vendor strings. crbug.com/326295
1052   if (initialize_gpu_data_manager) {
1053     // Note InitializeOneOff is not safe either for in-process gpu after
1054     // creating threads, since it may race with the gpu thread.
1055     if (!gfx::GLSurface::InitializeOneOff()) {
1056       LOG(FATAL) << "GLSurface::InitializeOneOff failed";
1057     }
1058   }
1059 #endif
1060
1061   if (initialize_gpu_data_manager)
1062     GpuDataManagerImpl::GetInstance()->Initialize();
1063
1064   bool always_uses_gpu = true;
1065   bool established_gpu_channel = false;
1066 #if defined(USE_AURA) || defined(OS_MACOSX)
1067   established_gpu_channel = true;
1068   if (!GpuDataManagerImpl::GetInstance()->CanUseGpuBrowserCompositor()) {
1069     established_gpu_channel = always_uses_gpu = false;
1070   }
1071   BrowserGpuChannelHostFactory::Initialize(established_gpu_channel);
1072   ImageTransportFactory::Initialize();
1073 #if defined(USE_AURA)
1074   if (aura::Env::GetInstance()) {
1075     aura::Env::GetInstance()->set_context_factory(GetContextFactory());
1076   }
1077 #endif
1078 #elif defined(OS_ANDROID)
1079   // TODO(crbug.com/439322): This should be set to |true|.
1080   established_gpu_channel = false;
1081   BrowserGpuChannelHostFactory::Initialize(established_gpu_channel);
1082 #endif
1083
1084 #if defined(OS_LINUX) && defined(USE_UDEV)
1085   device_monitor_linux_.reset(new DeviceMonitorLinux());
1086 #elif defined(OS_MACOSX)
1087   device_monitor_mac_.reset(new DeviceMonitorMac());
1088 #endif
1089
1090 #if defined(OS_WIN)
1091   UMA_HISTOGRAM_BOOLEAN("Windows.Win32kRendererLockdown",
1092                         IsWin32kRendererLockdownEnabled());
1093 #endif
1094   // RDH needs the IO thread to be created
1095   {
1096     TRACE_EVENT0("startup",
1097       "BrowserMainLoop::BrowserThreadsStarted:InitResourceDispatcherHost");
1098     resource_dispatcher_host_.reset(new ResourceDispatcherHostImpl());
1099   }
1100
1101   // MediaStreamManager needs the IO thread to be created.
1102   {
1103     TRACE_EVENT0("startup",
1104       "BrowserMainLoop::BrowserThreadsStarted:InitMediaStreamManager");
1105     media_stream_manager_.reset(new MediaStreamManager(audio_manager_.get()));
1106   }
1107
1108   {
1109     TRACE_EVENT0("startup",
1110       "BrowserMainLoop::BrowserThreadsStarted:InitSpeechRecognition");
1111     speech_recognition_manager_.reset(new SpeechRecognitionManagerImpl(
1112         audio_manager_.get(), media_stream_manager_.get()));
1113   }
1114
1115   {
1116     TRACE_EVENT0(
1117         "startup",
1118         "BrowserMainLoop::BrowserThreadsStarted::InitUserInputMonitor");
1119     user_input_monitor_ = media::UserInputMonitor::Create(
1120         io_thread_->message_loop_proxy(), main_thread_->message_loop_proxy());
1121   }
1122
1123   {
1124     TRACE_EVENT0("startup",
1125                  "BrowserMainLoop::BrowserThreadsStarted::TimeZoneMonitor");
1126     time_zone_monitor_ = TimeZoneMonitor::Create();
1127   }
1128
1129   // Alert the clipboard class to which threads are allowed to access the
1130   // clipboard:
1131   std::vector<base::PlatformThreadId> allowed_clipboard_threads;
1132   // The current thread is the UI thread.
1133   allowed_clipboard_threads.push_back(base::PlatformThread::CurrentId());
1134 #if defined(OS_WIN)
1135   // On Windows, clipboards are also used on the File or IO threads.
1136   allowed_clipboard_threads.push_back(file_thread_->thread_id());
1137   allowed_clipboard_threads.push_back(io_thread_->thread_id());
1138 #endif
1139   ui::Clipboard::SetAllowedThreads(allowed_clipboard_threads);
1140
1141   // When running the GPU thread in-process, avoid optimistically starting it
1142   // since creating the GPU thread races against creation of the one-and-only
1143   // ChildProcess instance which is created by the renderer thread.
1144   if (GpuDataManagerImpl::GetInstance()->GpuAccessAllowed(NULL) &&
1145       !established_gpu_channel &&
1146       always_uses_gpu &&
1147       !UsingInProcessGpu()) {
1148     TRACE_EVENT_INSTANT0("gpu", "Post task to launch GPU process",
1149                          TRACE_EVENT_SCOPE_THREAD);
1150     BrowserThread::PostTask(
1151         BrowserThread::IO, FROM_HERE, base::Bind(
1152             base::IgnoreResult(&GpuProcessHost::Get),
1153             GpuProcessHost::GPU_PROCESS_KIND_SANDBOXED,
1154             CAUSE_FOR_GPU_LAUNCH_BROWSER_STARTUP));
1155   }
1156
1157 #if defined(OS_MACOSX)
1158   ThemeHelperMac::GetInstance();
1159   SystemHotkeyHelperMac::GetInstance()->DeferredLoadSystemHotkeys();
1160   if (ShouldEnableBootstrapSandbox()) {
1161     TRACE_EVENT0("startup",
1162         "BrowserMainLoop::BrowserThreadsStarted:BootstrapSandbox");
1163     CHECK(GetBootstrapSandbox());
1164   }
1165 #endif  // defined(OS_MACOSX)
1166
1167 #endif  // !defined(OS_IOS)
1168
1169   return result_code_;
1170 }
1171
1172 bool BrowserMainLoop::UsingInProcessGpu() const {
1173   return parsed_command_line_.HasSwitch(switches::kSingleProcess) ||
1174          parsed_command_line_.HasSwitch(switches::kInProcessGPU);
1175 }
1176
1177 bool BrowserMainLoop::InitializeToolkit() {
1178   TRACE_EVENT0("startup", "BrowserMainLoop::InitializeToolkit");
1179   // TODO(evan): this function is rather subtle, due to the variety
1180   // of intersecting ifdefs we have.  To keep it easy to follow, there
1181   // are no #else branches on any #ifs.
1182   // TODO(stevenjb): Move platform specific code into platform specific Parts
1183   // (Need to add InitializeToolkit stage to BrowserParts).
1184   // See also GTK setup in EarlyInitialization, above, and associated comments.
1185
1186 #if defined(OS_WIN)
1187   // Init common control sex.
1188   INITCOMMONCONTROLSEX config;
1189   config.dwSize = sizeof(config);
1190   config.dwICC = ICC_WIN95_CLASSES;
1191   if (!InitCommonControlsEx(&config))
1192     PLOG(FATAL);
1193 #endif
1194
1195 #if defined(USE_AURA)
1196
1197 #if defined(USE_X11)
1198   if (!gfx::GetXDisplay())
1199     return false;
1200 #endif
1201
1202   // Env creates the compositor. Aura widgets need the compositor to be created
1203   // before they can be initialized by the browser.
1204   aura::Env::CreateInstance(true);
1205 #endif  // defined(USE_AURA)
1206
1207   if (parts_)
1208     parts_->ToolkitInitialized();
1209
1210   return true;
1211 }
1212
1213 void BrowserMainLoop::MainMessageLoopRun() {
1214 #if defined(OS_ANDROID)
1215   // Android's main message loop is the Java message loop.
1216   NOTREACHED();
1217 #else
1218   DCHECK(base::MessageLoopForUI::IsCurrent());
1219   if (parameters_.ui_task)
1220     base::MessageLoopForUI::current()->PostTask(FROM_HERE,
1221                                                 *parameters_.ui_task);
1222
1223   base::RunLoop run_loop;
1224   run_loop.Run();
1225 #endif
1226 }
1227
1228 base::FilePath BrowserMainLoop::GetStartupTraceFileName(
1229     const base::CommandLine& command_line) const {
1230   base::FilePath trace_file = command_line.GetSwitchValuePath(
1231       switches::kTraceStartupFile);
1232   // trace_file = "none" means that startup events will show up for the next
1233   // begin/end tracing (via about:tracing or AutomationProxy::BeginTracing/
1234   // EndTracing, for example).
1235   if (trace_file == base::FilePath().AppendASCII("none"))
1236     return trace_file;
1237
1238   if (trace_file.empty()) {
1239 #if defined(OS_ANDROID)
1240     TracingControllerAndroid::GenerateTracingFilePath(&trace_file);
1241 #else
1242     // Default to saving the startup trace into the current dir.
1243     trace_file = base::FilePath().AppendASCII("chrometrace.log");
1244 #endif
1245   }
1246
1247   return trace_file;
1248 }
1249
1250 void BrowserMainLoop::InitStartupTracing(
1251     const base::CommandLine& command_line) {
1252   DCHECK(is_tracing_startup_);
1253
1254   startup_trace_file_ = GetStartupTraceFileName(parsed_command_line_);
1255
1256   std::string delay_str = command_line.GetSwitchValueASCII(
1257       switches::kTraceStartupDuration);
1258   int delay_secs = 5;
1259   if (!delay_str.empty() && !base::StringToInt(delay_str, &delay_secs)) {
1260     DLOG(WARNING) << "Could not parse --" << switches::kTraceStartupDuration
1261         << "=" << delay_str << " defaulting to 5 (secs)";
1262     delay_secs = 5;
1263   }
1264
1265   startup_trace_timer_.Start(FROM_HERE,
1266                              base::TimeDelta::FromSeconds(delay_secs),
1267                              this,
1268                              &BrowserMainLoop::EndStartupTracing);
1269 }
1270
1271 void BrowserMainLoop::EndStartupTracing() {
1272   is_tracing_startup_ = false;
1273   TracingController::GetInstance()->DisableRecording(
1274       TracingController::CreateFileSink(
1275           startup_trace_file_,
1276           base::Bind(OnStoppedStartupTracing, startup_trace_file_)));
1277 }
1278
1279 }  // namespace content