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/common/host_discardable_shared_memory_manager.h"
  45 #include "content/public/browser/browser_main_parts.h"
  46 #include "content/public/browser/browser_shutdown.h"
  47 #include "content/public/browser/content_browser_client.h"
  48 #include "content/public/browser/render_process_host.h"
  49 #include "content/public/browser/tracing_controller.h"
  50 #include "content/public/common/content_switches.h"
  51 #include "content/public/common/main_function_params.h"
  52 #include "content/public/common/result_codes.h"
  53 #include "crypto/nss_util.h"
  54 #include "device/battery/battery_status_service.h"
  55 #include "media/audio/audio_manager.h"
  56 #include "media/base/media.h"
  57 #include "media/base/user_input_monitor.h"
  58 #include "media/midi/midi_manager.h"
  59 #include "net/base/network_change_notifier.h"
  60 #include "net/socket/client_socket_factory.h"
  61 #include "net/ssl/ssl_config_service.h"
  62 #include "ui/base/clipboard/clipboard.h"
  63
  64 #if defined(USE_AURA) || (defined(OS_MACOSX) && !defined(OS_IOS))
  65 #include "content/browser/compositor/image_transport_factory.h"
  66 #endif
  67
  68 #if defined(USE_AURA)
  69 #include "content/public/browser/context_factory.h"
  70 #include "ui/aura/env.h"
  71 #endif
  72
  73 #if !defined(OS_IOS)
  74 #include "content/browser/renderer_host/render_process_host_impl.h"
  75 #endif
  76
  77 #if defined(OS_ANDROID)
  78 #include "base/android/jni_android.h"
  79 #include "content/browser/android/browser_startup_controller.h"
  80 #include "content/browser/android/browser_surface_texture_manager.h"
  81 #include "content/browser/android/tracing_controller_android.h"
  82 #include "content/browser/screen_orientation/screen_orientation_delegate_android.h"
  83 #include "content/public/browser/screen_orientation_provider.h"
  84 #include "ui/gl/gl_surface.h"
  85 #endif
  86
  87 #if defined(OS_MACOSX) && !defined(OS_IOS)
  88 #include "content/browser/bootstrap_sandbox_mac.h"
  89 #include "content/browser/cocoa/system_hotkey_helper_mac.h"
  90 #include "content/browser/compositor/browser_compositor_view_mac.h"
  91 #include "content/browser/theme_helper_mac.h"
  92 #endif
  93
  94 #if defined(OS_WIN)
  95 #include <windows.h>
  96 #include <commctrl.h>
  97 #include <shellapi.h>
  98
  99 #include "content/browser/system_message_window_win.h"
 100 #include "content/common/sandbox_win.h"
 101 #include "net/base/winsock_init.h"
 102 #include "ui/base/l10n/l10n_util_win.h"
 103 #endif
 104
 105 #if defined(OS_CHROMEOS)
 106 #include "base/chromeos/memory_pressure_monitor_chromeos.h"
 107 #include "chromeos/chromeos_switches.h"
 108 #endif
 109
 110 #if defined(USE_GLIB)
 111 #include <glib-object.h>
 112 #endif
 113
 114 #if defined(OS_LINUX) && defined(USE_UDEV)
 115 #include "content/browser/device_monitor_udev.h"
 116 #elif defined(OS_MACOSX) && !defined(OS_IOS)
 117 #include "content/browser/device_monitor_mac.h"
 118 #endif
 119
 120 #if defined(OS_POSIX) && !defined(OS_MACOSX)
 121 #include "content/browser/renderer_host/render_sandbox_host_linux.h"
 122 #include "content/browser/zygote_host/zygote_host_impl_linux.h"
 123 #include "sandbox/linux/suid/client/setuid_sandbox_host.h"
 124 #endif
 125
 126 #if defined(ENABLE_PLUGINS)
 127 #include "content/browser/plugin_service_impl.h"
 128 #endif
 129
 130 #if defined(TCMALLOC_TRACE_MEMORY_SUPPORTED)
 131 #include "third_party/tcmalloc/chromium/src/gperftools/heap-profiler.h"
 132 #endif
 133
 134 #if defined(USE_X11)
 135 #include "ui/gfx/x/x11_connection.h"
 136 #include "ui/gfx/x/x11_types.h"
 137 #endif
 138
 139 // One of the linux specific headers defines this as a macro.
 140 #ifdef DestroyAll
 141 #undef DestroyAll
 142 #endif
 143
 144 namespace content {
 145 namespace {
 146
 147 #if defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
 148 void SetupSandbox(const base::CommandLine& parsed_command_line) {
 149   TRACE_EVENT0("startup", "SetupSandbox");
 150   base::FilePath sandbox_binary;
 151
 152   scoped_ptr<sandbox::SetuidSandboxHost> setuid_sandbox_host(
 153       sandbox::SetuidSandboxHost::Create());
 154
 155   const bool want_setuid_sandbox =
 156       !parsed_command_line.HasSwitch(switches::kNoSandbox) &&
 157       !parsed_command_line.HasSwitch(switches::kDisableSetuidSandbox) &&
 158       !setuid_sandbox_host->IsDisabledViaEnvironment();
 159
 160   static const char no_suid_error[] =
 161       "Running without the SUID sandbox! See "
 162       "https://code.google.com/p/chromium/wiki/LinuxSUIDSandboxDevelopment "
 163       "for more information on developing with the sandbox on.";
 164   if (want_setuid_sandbox) {
 165     sandbox_binary = setuid_sandbox_host->GetSandboxBinaryPath();
 166     if (sandbox_binary.empty()) {
 167       // This needs to be fatal. Talk to security@chromium.org if you feel
 168       // otherwise.
 169       LOG(FATAL) << no_suid_error;
 170     }
 171   } else {
 172     LOG(ERROR) << no_suid_error;
 173   }
 174
 175   // Tickle the sandbox host and zygote host so they fork now.
 176   RenderSandboxHostLinux::GetInstance()->Init();
 177   ZygoteHostImpl::GetInstance()->Init(sandbox_binary.value());
 178 }
 179 #endif
 180
 181 #if defined(USE_GLIB)
 182 static void GLibLogHandler(const gchar* log_domain,
 183                            GLogLevelFlags log_level,
 184                            const gchar* message,
 185                            gpointer userdata) {
 186   if (!log_domain)
 187     log_domain = "<unknown>";
 188   if (!message)
 189     message = "<no message>";
 190
 191   if (strstr(message, "Unable to retrieve the file info for")) {
 192     LOG(ERROR) << "GTK File code error: " << message;
 193   } else if (strstr(message, "Could not find the icon") &&
 194              strstr(log_domain, "Gtk")) {
 195     LOG(ERROR) << "GTK icon error: " << message;
 196   } else if (strstr(message, "Theme file for default has no") ||
 197              strstr(message, "Theme directory") ||
 198              strstr(message, "theme pixmap") ||
 199              strstr(message, "locate theme engine")) {
 200     LOG(ERROR) << "GTK theme error: " << message;
 201   } else if (strstr(message, "Unable to create Ubuntu Menu Proxy") &&
 202              strstr(log_domain, "<unknown>")) {
 203     LOG(ERROR) << "GTK menu proxy create failed";
 204   } else if (strstr(message, "Out of memory") &&
 205              strstr(log_domain, "<unknown>")) {
 206     LOG(ERROR) << "DBus call timeout or out of memory: "
 207                << "http://crosbug.com/15496";
 208   } else if (strstr(message, "Could not connect: Connection refused") &&
 209              strstr(log_domain, "<unknown>")) {
 210     LOG(ERROR) << "DConf settings backend could not connect to session bus: "
 211                << "http://crbug.com/179797";
 212   } else if (strstr(message, "Attempting to store changes into") ||
 213              strstr(message, "Attempting to set the permissions of")) {
 214     LOG(ERROR) << message << " (http://bugs.chromium.org/161366)";
 215   } else if (strstr(message, "drawable is not a native X11 window")) {
 216     LOG(ERROR) << message << " (http://bugs.chromium.org/329991)";
 217   } else {
 218     LOG(DFATAL) << log_domain << ": " << message;
 219   }
 220 }
 221
 222 static void SetUpGLibLogHandler() {
 223   // Register GLib-handled assertions to go through our logging system.
 224   const char* kLogDomains[] = { NULL, "Gtk", "Gdk", "GLib", "GLib-GObject" };
 225   for (size_t i = 0; i < arraysize(kLogDomains); i++) {
 226     g_log_set_handler(kLogDomains[i],
 227                       static_cast<GLogLevelFlags>(G_LOG_FLAG_RECURSION |
 228                                                   G_LOG_FLAG_FATAL |
 229                                                   G_LOG_LEVEL_ERROR |
 230                                                   G_LOG_LEVEL_CRITICAL |
 231                                                   G_LOG_LEVEL_WARNING),
 232                       GLibLogHandler,
 233                       NULL);
 234   }
 235 }
 236 #endif
 237
 238 void OnStoppedStartupTracing(const base::FilePath& trace_file) {
 239   VLOG(0) << "Completed startup tracing to " << trace_file.value();
 240 }
 241
 242 // Disable optimizations for this block of functions so the compiler doesn't
 243 // merge them all together. This makes it possible to tell what thread was
 244 // unresponsive by inspecting the callstack.
 245 MSVC_DISABLE_OPTIMIZE()
 246 MSVC_PUSH_DISABLE_WARNING(4748)
 247
 248 NOINLINE void ResetThread_DB(scoped_ptr<BrowserProcessSubThread> thread) {
 249   volatile int inhibit_comdat = __LINE__;
 250   ALLOW_UNUSED_LOCAL(inhibit_comdat);
 251   thread.reset();
 252 }
 253
 254 NOINLINE void ResetThread_FILE(scoped_ptr<BrowserProcessSubThread> thread) {
 255   volatile int inhibit_comdat = __LINE__;
 256   ALLOW_UNUSED_LOCAL(inhibit_comdat);
 257   thread.reset();
 258 }
 259
 260 NOINLINE void ResetThread_FILE_USER_BLOCKING(
 261     scoped_ptr<BrowserProcessSubThread> thread) {
 262   volatile int inhibit_comdat = __LINE__;
 263   ALLOW_UNUSED_LOCAL(inhibit_comdat);
 264   thread.reset();
 265 }
 266
 267 NOINLINE void ResetThread_PROCESS_LAUNCHER(
 268     scoped_ptr<BrowserProcessSubThread> thread) {
 269   volatile int inhibit_comdat = __LINE__;
 270   ALLOW_UNUSED_LOCAL(inhibit_comdat);
 271   thread.reset();
 272 }
 273
 274 NOINLINE void ResetThread_CACHE(scoped_ptr<BrowserProcessSubThread> thread) {
 275   volatile int inhibit_comdat = __LINE__;
 276   ALLOW_UNUSED_LOCAL(inhibit_comdat);
 277   thread.reset();
 278 }
 279
 280 NOINLINE void ResetThread_IO(scoped_ptr<BrowserProcessSubThread> thread) {
 281   volatile int inhibit_comdat = __LINE__;
 282   ALLOW_UNUSED_LOCAL(inhibit_comdat);
 283   thread.reset();
 284 }
 285
 286 #if !defined(OS_IOS)
 287 NOINLINE void ResetThread_IndexedDb(scoped_ptr<base::Thread> thread) {
 288   volatile int inhibit_comdat = __LINE__;
 289   ALLOW_UNUSED_LOCAL(inhibit_comdat);
 290   thread.reset();
 291 }
 292 #endif
 293
 294 MSVC_POP_WARNING()
 295 MSVC_ENABLE_OPTIMIZE();
 296
 297 }  // namespace
 298
 299 // The currently-running BrowserMainLoop.  There can be one or zero.
 300 BrowserMainLoop* g_current_browser_main_loop = NULL;
 301
 302 // This is just to be able to keep ShutdownThreadsAndCleanUp out of
 303 // the public interface of BrowserMainLoop.
 304 class BrowserShutdownImpl {
 305  public:
 306   static void ImmediateShutdownAndExitProcess() {
 307     DCHECK(g_current_browser_main_loop);
 308     g_current_browser_main_loop->ShutdownThreadsAndCleanUp();
 309
 310 #if defined(OS_WIN)
 311     // At this point the message loop is still running yet we've shut everything
 312     // down. If any messages are processed we'll likely crash. Exit now.
 313     ExitProcess(RESULT_CODE_NORMAL_EXIT);
 314 #elif defined(OS_POSIX) && !defined(OS_MACOSX)
 315     _exit(RESULT_CODE_NORMAL_EXIT);
 316 #else
 317     NOTIMPLEMENTED();
 318 #endif
 319   }
 320 };
 321
 322 void ImmediateShutdownAndExitProcess() {
 323   BrowserShutdownImpl::ImmediateShutdownAndExitProcess();
 324 }
 325
 326 // For measuring memory usage after each task. Behind a command line flag.
 327 class BrowserMainLoop::MemoryObserver : public base::MessageLoop::TaskObserver {
 328  public:
 329   MemoryObserver() {}
 330   ~MemoryObserver() override {}
 331
 332   void WillProcessTask(const base::PendingTask& pending_task) override {}
 333
 334   void DidProcessTask(const base::PendingTask& pending_task) override {
 335 #if !defined(OS_IOS)  // No ProcessMetrics on IOS.
 336     scoped_ptr<base::ProcessMetrics> process_metrics(
 337         base::ProcessMetrics::CreateProcessMetrics(
 338 #if defined(OS_MACOSX)
 339             base::GetCurrentProcessHandle(), NULL));
 340 #else
 341             base::GetCurrentProcessHandle()));
 342 #endif
 343     size_t private_bytes;
 344     process_metrics->GetMemoryBytes(&private_bytes, NULL);
 345     LOCAL_HISTOGRAM_MEMORY_KB("Memory.BrowserUsed", private_bytes >> 10);
 346 #endif
 347   }
 348  private:
 349   DISALLOW_COPY_AND_ASSIGN(MemoryObserver);
 350 };
 351
 352
 353 // BrowserMainLoop construction / destruction =============================
 354
 355 BrowserMainLoop* BrowserMainLoop::GetInstance() {
 356   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 357   return g_current_browser_main_loop;
 358 }
 359
 360 BrowserMainLoop::BrowserMainLoop(const MainFunctionParams& parameters)
 361     : parameters_(parameters),
 362       parsed_command_line_(parameters.command_line),
 363       result_code_(RESULT_CODE_NORMAL_EXIT),
 364       created_threads_(false),
 365       // ContentMainRunner should have enabled tracing of the browser process
 366       // when kTraceStartup is in the command line.
 367       is_tracing_startup_(
 368           parameters.command_line.HasSwitch(switches::kTraceStartup)) {
 369   DCHECK(!g_current_browser_main_loop);
 370   g_current_browser_main_loop = this;
 371 }
 372
 373 BrowserMainLoop::~BrowserMainLoop() {
 374   DCHECK_EQ(this, g_current_browser_main_loop);
 375 #if !defined(OS_IOS)
 376   ui::Clipboard::DestroyClipboardForCurrentThread();
 377 #endif  // !defined(OS_IOS)
 378   g_current_browser_main_loop = NULL;
 379 }
 380
 381 void BrowserMainLoop::Init() {
 382   TRACE_EVENT0("startup", "BrowserMainLoop::Init");
 383   parts_.reset(
 384       GetContentClient()->browser()->CreateBrowserMainParts(parameters_));
 385 }
 386
 387 // BrowserMainLoop stages ==================================================
 388
 389 void BrowserMainLoop::EarlyInitialization() {
 390   TRACE_EVENT0("startup", "BrowserMainLoop::EarlyInitialization");
 391
 392 #if defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
 393   // No thread should be created before this call, as SetupSandbox()
 394   // will end-up using fork().
 395   SetupSandbox(parsed_command_line_);
 396 #endif
 397
 398 #if defined(USE_X11)
 399   if (UsingInProcessGpu()) {
 400     if (!gfx::InitializeThreadedX11()) {
 401       LOG(ERROR) << "Failed to put Xlib into threaded mode.";
 402     }
 403   }
 404 #endif
 405
 406   // GLib's spawning of new processes is buggy, so it's important that at this
 407   // point GLib does not need to start DBUS. Chrome should always start with
 408   // DBUS_SESSION_BUS_ADDRESS properly set. See crbug.com/309093.
 409 #if defined(USE_GLIB)
 410   // g_type_init will be deprecated in 2.36. 2.35 is the development
 411   // version for 2.36, hence do not call g_type_init starting 2.35.
 412   // http://developer.gnome.org/gobject/unstable/gobject-Type-Information.html#g-type-init
 413 #if !GLIB_CHECK_VERSION(2, 35, 0)
 414   // GLib type system initialization. Needed at least for gconf,
 415   // used in net/proxy/proxy_config_service_linux.cc. Most likely
 416   // this is superfluous as gtk_init() ought to do this. It's
 417   // definitely harmless, so retained as a reminder of this
 418   // requirement for gconf.
 419   g_type_init();
 420 #endif
 421
 422   SetUpGLibLogHandler();
 423 #endif
 424
 425   if (parts_)
 426     parts_->PreEarlyInitialization();
 427
 428 #if defined(OS_MACOSX)
 429   // We use quite a few file descriptors for our IPC, and the default limit on
 430   // the Mac is low (256), so bump it up.
 431   base::SetFdLimit(1024);
 432 #endif
 433
 434 #if defined(OS_WIN)
 435   net::EnsureWinsockInit();
 436 #endif
 437
 438 #if !defined(USE_OPENSSL)
 439   // We want to be sure to init NSPR on the main thread.
 440   crypto::EnsureNSPRInit();
 441 #endif  // !defined(USE_OPENSSL)
 442
 443 #if !defined(OS_IOS)
 444   if (parsed_command_line_.HasSwitch(switches::kRendererProcessLimit)) {
 445     std::string limit_string = parsed_command_line_.GetSwitchValueASCII(
 446         switches::kRendererProcessLimit);
 447     size_t process_limit;
 448     if (base::StringToSizeT(limit_string, &process_limit)) {
 449       RenderProcessHost::SetMaxRendererProcessCount(process_limit);
 450     }
 451   }
 452 #endif  // !defined(OS_IOS)
 453
 454   if (parsed_command_line_.HasSwitch(switches::kEnableNativeGpuMemoryBuffers)) {
 455     BrowserGpuChannelHostFactory::EnableGpuMemoryBufferFactoryUsage(
 456         gfx::GpuMemoryBuffer::MAP);
 457   }
 458
 459 #if defined(USE_OZONE)
 460   BrowserGpuChannelHostFactory::EnableGpuMemoryBufferFactoryUsage(
 461       gfx::GpuMemoryBuffer::SCANOUT);
 462 #endif
 463
 464   base::DiscardableMemoryAllocator::SetInstance(
 465       HostDiscardableSharedMemoryManager::current());
 466
 467   if (parts_)
 468     parts_->PostEarlyInitialization();
 469 }
 470
 471 void BrowserMainLoop::MainMessageLoopStart() {
 472   TRACE_EVENT0("startup", "BrowserMainLoop::MainMessageLoopStart");
 473   if (parts_) {
 474     TRACE_EVENT0("startup",
 475         "BrowserMainLoop::MainMessageLoopStart:PreMainMessageLoopStart");
 476     parts_->PreMainMessageLoopStart();
 477   }
 478
 479 #if defined(OS_WIN)
 480   // If we're running tests (ui_task is non-null), then the ResourceBundle
 481   // has already been initialized.
 482   if (!parameters_.ui_task) {
 483     // Override the configured locale with the user's preferred UI language.
 484     l10n_util::OverrideLocaleWithUILanguageList();
 485   }
 486 #endif
 487
 488   // Create a MessageLoop if one does not already exist for the current thread.
 489   if (!base::MessageLoop::current())
 490     main_message_loop_.reset(new base::MessageLoopForUI);
 491
 492   InitializeMainThread();
 493
 494   {
 495     TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:SystemMonitor");
 496     system_monitor_.reset(new base::SystemMonitor);
 497   }
 498   {
 499     TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:PowerMonitor");
 500     scoped_ptr<base::PowerMonitorSource> power_monitor_source(
 501       new base::PowerMonitorDeviceSource());
 502     power_monitor_.reset(new base::PowerMonitor(power_monitor_source.Pass()));
 503   }
 504   {
 505     TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:HighResTimerManager");
 506     hi_res_timer_manager_.reset(new base::HighResolutionTimerManager);
 507   }
 508   {
 509     TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:NetworkChangeNotifier");
 510     network_change_notifier_.reset(net::NetworkChangeNotifier::Create());
 511   }
 512
 513 #if !defined(OS_IOS)
 514   {
 515     TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:MediaFeatures");
 516     media::InitializeCPUSpecificMediaFeatures();
 517   }
 518   {
 519     TRACE_EVENT0("startup",
 520                  "BrowserMainLoop::Subsystem:ContentWebUIController");
 521     WebUIControllerFactory::RegisterFactory(
 522         ContentWebUIControllerFactory::GetInstance());
 523   }
 524
 525   {
 526     TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:OnlineStateObserver");
 527     online_state_observer_.reset(new BrowserOnlineStateObserver);
 528   }
 529
 530   {
 531     system_stats_monitor_.reset(
 532         new base::trace_event::TraceEventSystemStatsMonitor(
 533             base::ThreadTaskRunnerHandle::Get()));
 534   }
 535 #endif  // !defined(OS_IOS)
 536
 537 #if defined(OS_WIN)
 538   system_message_window_.reset(new SystemMessageWindowWin);
 539 #endif
 540
 541   if (parts_)
 542     parts_->PostMainMessageLoopStart();
 543
 544 #if !defined(OS_IOS)
 545   // Start tracing to a file if needed. Only do this after starting the main
 546   // message loop to avoid calling MessagePumpForUI::ScheduleWork() before
 547   // MessagePumpForUI::Start() as it will crash the browser.
 548   if (is_tracing_startup_) {
 549     TRACE_EVENT0("startup", "BrowserMainLoop::InitStartupTracing");
 550     InitStartupTracing(parsed_command_line_);
 551   }
 552 #endif  // !defined(OS_IOS)
 553
 554 #if defined(OS_ANDROID)
 555   {
 556     TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:SurfaceTextureManager");
 557     SurfaceTextureManager::InitInstance(new BrowserSurfaceTextureManager);
 558   }
 559
 560   if (!parsed_command_line_.HasSwitch(
 561       switches::kDisableScreenOrientationLock)) {
 562     TRACE_EVENT0("startup",
 563                  "BrowserMainLoop::Subsystem:ScreenOrientationProvider");
 564     screen_orientation_delegate_.reset(
 565         new ScreenOrientationDelegateAndroid());
 566     ScreenOrientationProvider::SetDelegate(screen_orientation_delegate_.get());
 567   }
 568 #endif
 569
 570   if (parsed_command_line_.HasSwitch(switches::kMemoryMetrics)) {
 571     TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:MemoryObserver");
 572     memory_observer_.reset(new MemoryObserver());
 573     base::MessageLoop::current()->AddTaskObserver(memory_observer_.get());
 574   }
 575
 576 #if defined(TCMALLOC_TRACE_MEMORY_SUPPORTED)
 577   trace_memory_controller_.reset(new base::trace_event::TraceMemoryController(
 578       base::MessageLoop::current()->message_loop_proxy(),
 579       ::HeapProfilerWithPseudoStackStart, ::HeapProfilerStop,
 580       ::GetHeapProfile));
 581 #endif
 582 }
 583
 584 int BrowserMainLoop::PreCreateThreads() {
 585   if (parts_) {
 586     TRACE_EVENT0("startup",
 587         "BrowserMainLoop::CreateThreads:PreCreateThreads");
 588     result_code_ = parts_->PreCreateThreads();
 589   }
 590
 591 #if defined(OS_CHROMEOS)
 592   if (chromeos::switches::MemoryPressureHandlingEnabled()) {
 593     memory_pressure_monitor_.reset(new base::MemoryPressureMonitorChromeOS(
 594         chromeos::switches::GetMemoryPressureThresholds()));
 595   }
 596 #endif
 597
 598 #if defined(ENABLE_PLUGINS)
 599   // Prior to any processing happening on the io thread, we create the
 600   // plugin service as it is predominantly used from the io thread,
 601   // but must be created on the main thread. The service ctor is
 602   // inexpensive and does not invoke the io_thread() accessor.
 603   {
 604     TRACE_EVENT0("startup", "BrowserMainLoop::CreateThreads:PluginService");
 605     PluginService::GetInstance()->Init();
 606   }
 607 #endif
 608
 609   // Need to initialize in-process GpuDataManager before creating threads.
 610   // It's unsafe to append the gpu command line switches to the global
 611   // CommandLine::ForCurrentProcess object after threads are created.
 612   if (UsingInProcessGpu()) {
 613     bool initialize_gpu_data_manager = true;
 614 #if defined(OS_ANDROID)
 615     if (!gfx::GLSurface::InitializeOneOff()) {
 616       // Single-process Android WebView supports no gpu.
 617       LOG(ERROR) << "GLSurface::InitializeOneOff failed";
 618       initialize_gpu_data_manager = false;
 619     }
 620 #endif
 621
 622     // Initialize the GpuDataManager before we set up the MessageLoops because
 623     // otherwise we'll trigger the assertion about doing IO on the UI thread.
 624     if (initialize_gpu_data_manager)
 625       GpuDataManagerImpl::GetInstance()->Initialize();
 626   }
 627
 628 #if !defined(OS_IOS) && (!defined(GOOGLE_CHROME_BUILD) || defined(OS_ANDROID))
 629   // Single-process is an unsupported and not fully tested mode, so
 630   // don't enable it for official Chrome builds (except on Android).
 631   if (parsed_command_line_.HasSwitch(switches::kSingleProcess))
 632     RenderProcessHost::SetRunRendererInProcess(true);
 633 #endif
 634
 635   return result_code_;
 636 }
 637
 638 void BrowserMainLoop::CreateStartupTasks() {
 639   TRACE_EVENT0("startup", "BrowserMainLoop::CreateStartupTasks");
 640
 641   // First time through, we really want to create all the tasks
 642   if (!startup_task_runner_.get()) {
 643 #if defined(OS_ANDROID)
 644     startup_task_runner_ = make_scoped_ptr(new StartupTaskRunner(
 645         base::Bind(&BrowserStartupComplete),
 646         base::MessageLoop::current()->message_loop_proxy()));
 647 #else
 648     startup_task_runner_ = make_scoped_ptr(new StartupTaskRunner(
 649         base::Callback<void(int)>(),
 650         base::MessageLoop::current()->message_loop_proxy()));
 651 #endif
 652     StartupTask pre_create_threads =
 653         base::Bind(&BrowserMainLoop::PreCreateThreads, base::Unretained(this));
 654     startup_task_runner_->AddTask(pre_create_threads);
 655
 656     StartupTask create_threads =
 657         base::Bind(&BrowserMainLoop::CreateThreads, base::Unretained(this));
 658     startup_task_runner_->AddTask(create_threads);
 659
 660     StartupTask browser_thread_started = base::Bind(
 661         &BrowserMainLoop::BrowserThreadsStarted, base::Unretained(this));
 662     startup_task_runner_->AddTask(browser_thread_started);
 663
 664     StartupTask pre_main_message_loop_run = base::Bind(
 665         &BrowserMainLoop::PreMainMessageLoopRun, base::Unretained(this));
 666     startup_task_runner_->AddTask(pre_main_message_loop_run);
 667
 668 #if defined(OS_ANDROID)
 669     if (BrowserMayStartAsynchronously()) {
 670       startup_task_runner_->StartRunningTasksAsync();
 671     }
 672 #endif
 673   }
 674 #if defined(OS_ANDROID)
 675   if (!BrowserMayStartAsynchronously()) {
 676     // A second request for asynchronous startup can be ignored, so
 677     // StartupRunningTasksAsync is only called first time through. If, however,
 678     // this is a request for synchronous startup then it must override any
 679     // previous call for async startup, so we call RunAllTasksNow()
 680     // unconditionally.
 681     startup_task_runner_->RunAllTasksNow();
 682   }
 683 #else
 684   startup_task_runner_->RunAllTasksNow();
 685 #endif
 686 }
 687
 688 int BrowserMainLoop::CreateThreads() {
 689   TRACE_EVENT0("startup", "BrowserMainLoop::CreateThreads");
 690
 691   base::Thread::Options io_message_loop_options;
 692   io_message_loop_options.message_loop_type = base::MessageLoop::TYPE_IO;
 693   base::Thread::Options ui_message_loop_options;
 694   ui_message_loop_options.message_loop_type = base::MessageLoop::TYPE_UI;
 695
 696   // Start threads in the order they occur in the BrowserThread::ID
 697   // enumeration, except for BrowserThread::UI which is the main
 698   // thread.
 699   //
 700   // Must be size_t so we can increment it.
 701   for (size_t thread_id = BrowserThread::UI + 1;
 702        thread_id < BrowserThread::ID_COUNT;
 703        ++thread_id) {
 704     scoped_ptr<BrowserProcessSubThread>* thread_to_start = NULL;
 705     base::Thread::Options options;
 706
 707     switch (thread_id) {
 708       case BrowserThread::DB:
 709         TRACE_EVENT_BEGIN1("startup",
 710             "BrowserMainLoop::CreateThreads:start",
 711             "Thread", "BrowserThread::DB");
 712         thread_to_start = &db_thread_;
 713         options.timer_slack = base::TIMER_SLACK_MAXIMUM;
 714         break;
 715       case BrowserThread::FILE_USER_BLOCKING:
 716         TRACE_EVENT_BEGIN1("startup",
 717             "BrowserMainLoop::CreateThreads:start",
 718             "Thread", "BrowserThread::FILE_USER_BLOCKING");
 719         thread_to_start = &file_user_blocking_thread_;
 720         break;
 721       case BrowserThread::FILE:
 722         TRACE_EVENT_BEGIN1("startup",
 723             "BrowserMainLoop::CreateThreads:start",
 724             "Thread", "BrowserThread::FILE");
 725         thread_to_start = &file_thread_;
 726 #if defined(OS_WIN)
 727         // On Windows, the FILE thread needs to be have a UI message loop
 728         // which pumps messages in such a way that Google Update can
 729         // communicate back to us.
 730         options = ui_message_loop_options;
 731 #else
 732         options = io_message_loop_options;
 733 #endif
 734         options.timer_slack = base::TIMER_SLACK_MAXIMUM;
 735         break;
 736       case BrowserThread::PROCESS_LAUNCHER:
 737         TRACE_EVENT_BEGIN1("startup",
 738             "BrowserMainLoop::CreateThreads:start",
 739             "Thread", "BrowserThread::PROCESS_LAUNCHER");
 740         thread_to_start = &process_launcher_thread_;
 741         options.timer_slack = base::TIMER_SLACK_MAXIMUM;
 742         break;
 743       case BrowserThread::CACHE:
 744         TRACE_EVENT_BEGIN1("startup",
 745             "BrowserMainLoop::CreateThreads:start",
 746             "Thread", "BrowserThread::CACHE");
 747         thread_to_start = &cache_thread_;
 748         options = io_message_loop_options;
 749         options.timer_slack = base::TIMER_SLACK_MAXIMUM;
 750         break;
 751       case BrowserThread::IO:
 752         TRACE_EVENT_BEGIN1("startup",
 753             "BrowserMainLoop::CreateThreads:start",
 754             "Thread", "BrowserThread::IO");
 755         thread_to_start = &io_thread_;
 756         options = io_message_loop_options;
 757         break;
 758       case BrowserThread::UI:
 759       case BrowserThread::ID_COUNT:
 760       default:
 761         NOTREACHED();
 762         break;
 763     }
 764
 765     BrowserThread::ID id = static_cast<BrowserThread::ID>(thread_id);
 766
 767     if (thread_to_start) {
 768       (*thread_to_start).reset(new BrowserProcessSubThread(id));
 769       if (!(*thread_to_start)->StartWithOptions(options)) {
 770         LOG(FATAL) << "Failed to start the browser thread: id == " << id;
 771       }
 772     } else {
 773       NOTREACHED();
 774     }
 775
 776     TRACE_EVENT_END0("startup", "BrowserMainLoop::CreateThreads:start");
 777   }
 778   created_threads_ = true;
 779   return result_code_;
 780 }
 781
 782 int BrowserMainLoop::PreMainMessageLoopRun() {
 783   if (parts_) {
 784     TRACE_EVENT0("startup",
 785         "BrowserMainLoop::CreateThreads:PreMainMessageLoopRun");
 786     parts_->PreMainMessageLoopRun();
 787   }
 788
 789   // If the UI thread blocks, the whole UI is unresponsive.
 790   // Do not allow disk IO from the UI thread.
 791   base::ThreadRestrictions::SetIOAllowed(false);
 792   base::ThreadRestrictions::DisallowWaiting();
 793   return result_code_;
 794 }
 795
 796 void BrowserMainLoop::RunMainMessageLoopParts() {
 797   TRACE_EVENT_BEGIN_ETW("BrowserMain:MESSAGE_LOOP", 0, "");
 798
 799   bool ran_main_loop = false;
 800   if (parts_)
 801     ran_main_loop = parts_->MainMessageLoopRun(&result_code_);
 802
 803   if (!ran_main_loop)
 804     MainMessageLoopRun();
 805
 806   TRACE_EVENT_END_ETW("BrowserMain:MESSAGE_LOOP", 0, "");
 807 }
 808
 809 void BrowserMainLoop::ShutdownThreadsAndCleanUp() {
 810   if (!created_threads_) {
 811     // Called early, nothing to do
 812     return;
 813   }
 814   TRACE_EVENT0("shutdown", "BrowserMainLoop::ShutdownThreadsAndCleanUp");
 815
 816   // Teardown may start in PostMainMessageLoopRun, and during teardown we
 817   // need to be able to perform IO.
 818   base::ThreadRestrictions::SetIOAllowed(true);
 819   BrowserThread::PostTask(
 820       BrowserThread::IO, FROM_HERE,
 821       base::Bind(base::IgnoreResult(&base::ThreadRestrictions::SetIOAllowed),
 822                  true));
 823
 824 #if !defined(OS_IOS)
 825   if (RenderProcessHost::run_renderer_in_process())
 826     RenderProcessHostImpl::ShutDownInProcessRenderer();
 827 #endif
 828
 829   if (parts_) {
 830     TRACE_EVENT0("shutdown",
 831                  "BrowserMainLoop::Subsystem:PostMainMessageLoopRun");
 832     parts_->PostMainMessageLoopRun();
 833   }
 834
 835   trace_memory_controller_.reset();
 836   system_stats_monitor_.reset();
 837
 838 #if !defined(OS_IOS)
 839   // Destroying the GpuProcessHostUIShims on the UI thread posts a task to
 840   // delete related objects on the GPU thread. This must be done before
 841   // stopping the GPU thread. The GPU thread will close IPC channels to renderer
 842   // processes so this has to happen before stopping the IO thread.
 843   {
 844     TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:GPUProcessHostShim");
 845     GpuProcessHostUIShim::DestroyAll();
 846   }
 847   // Cancel pending requests and prevent new requests.
 848   if (resource_dispatcher_host_) {
 849     TRACE_EVENT0("shutdown",
 850                  "BrowserMainLoop::Subsystem:ResourceDispatcherHost");
 851     resource_dispatcher_host_.get()->Shutdown();
 852   }
 853
 854 #if defined(OS_CHROMEOS)
 855   memory_pressure_monitor_.reset();
 856 #endif
 857
 858 #if defined(OS_MACOSX)
 859   BrowserCompositorMac::DisableRecyclingForShutdown();
 860 #endif
 861
 862 #if defined(USE_AURA) || defined(OS_MACOSX)
 863   {
 864     TRACE_EVENT0("shutdown",
 865                  "BrowserMainLoop::Subsystem:ImageTransportFactory");
 866     ImageTransportFactory::Terminate();
 867   }
 868 #endif
 869
 870 #if defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
 871   ZygoteHostImpl::GetInstance()->TearDownAfterLastChild();
 872 #endif  // defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
 873
 874   // The device monitors are using |system_monitor_| as dependency, so delete
 875   // them before |system_monitor_| goes away.
 876   // On Mac and windows, the monitor needs to be destroyed on the same thread
 877   // as they were created. On Linux, the monitor will be deleted when IO thread
 878   // goes away.
 879 #if defined(OS_WIN)
 880   system_message_window_.reset();
 881 #elif defined(OS_MACOSX)
 882   device_monitor_mac_.reset();
 883 #endif
 884 #endif  // !defined(OS_IOS)
 885
 886   // Must be size_t so we can subtract from it.
 887   for (size_t thread_id = BrowserThread::ID_COUNT - 1;
 888        thread_id >= (BrowserThread::UI + 1);
 889        --thread_id) {
 890     // Find the thread object we want to stop. Looping over all valid
 891     // BrowserThread IDs and DCHECKing on a missing case in the switch
 892     // statement helps avoid a mismatch between this code and the
 893     // BrowserThread::ID enumeration.
 894     //
 895     // The destruction order is the reverse order of occurrence in the
 896     // BrowserThread::ID list. The rationale for the order is as
 897     // follows (need to be filled in a bit):
 898     //
 899     //
 900     // - The IO thread is the only user of the CACHE thread.
 901     //
 902     // - The PROCESS_LAUNCHER thread must be stopped after IO in case
 903     //   the IO thread posted a task to terminate a process on the
 904     //   process launcher thread.
 905     //
 906     // - (Not sure why DB stops last.)
 907     switch (thread_id) {
 908       case BrowserThread::DB: {
 909         TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:DBThread");
 910         ResetThread_DB(db_thread_.Pass());
 911         break;
 912       }
 913       case BrowserThread::FILE: {
 914         TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:FileThread");
 915 #if !defined(OS_IOS)
 916         // Clean up state that lives on or uses the file_thread_ before
 917         // it goes away.
 918         if (resource_dispatcher_host_)
 919           resource_dispatcher_host_.get()->save_file_manager()->Shutdown();
 920 #endif  // !defined(OS_IOS)
 921         ResetThread_FILE(file_thread_.Pass());
 922         break;
 923       }
 924       case BrowserThread::FILE_USER_BLOCKING: {
 925         TRACE_EVENT0("shutdown",
 926                       "BrowserMainLoop::Subsystem:FileUserBlockingThread");
 927         ResetThread_FILE_USER_BLOCKING(file_user_blocking_thread_.Pass());
 928         break;
 929       }
 930       case BrowserThread::PROCESS_LAUNCHER: {
 931         TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:LauncherThread");
 932         ResetThread_PROCESS_LAUNCHER(process_launcher_thread_.Pass());
 933         break;
 934       }
 935       case BrowserThread::CACHE: {
 936         TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:CacheThread");
 937         ResetThread_CACHE(cache_thread_.Pass());
 938         break;
 939       }
 940       case BrowserThread::IO: {
 941         TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:IOThread");
 942         ResetThread_IO(io_thread_.Pass());
 943         break;
 944       }
 945       case BrowserThread::UI:
 946       case BrowserThread::ID_COUNT:
 947       default:
 948         NOTREACHED();
 949         break;
 950     }
 951   }
 952
 953 #if !defined(OS_IOS)
 954   {
 955     TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:IndexedDBThread");
 956     ResetThread_IndexedDb(indexed_db_thread_.Pass());
 957   }
 958 #endif
 959
 960   // Close the blocking I/O pool after the other threads. Other threads such
 961   // as the I/O thread may need to schedule work like closing files or flushing
 962   // data during shutdown, so the blocking pool needs to be available. There
 963   // may also be slow operations pending that will blcok shutdown, so closing
 964   // it here (which will block until required operations are complete) gives
 965   // more head start for those operations to finish.
 966   {
 967     TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:ThreadPool");
 968     BrowserThreadImpl::ShutdownThreadPool();
 969   }
 970
 971 #if !defined(OS_IOS)
 972   // Must happen after the IO thread is shutdown since this may be accessed from
 973   // it.
 974   {
 975     TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:GPUChannelFactory");
 976     if (BrowserGpuChannelHostFactory::instance())
 977       BrowserGpuChannelHostFactory::Terminate();
 978   }
 979
 980   // Must happen after the I/O thread is shutdown since this class lives on the
 981   // I/O thread and isn't threadsafe.
 982   {
 983     TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:GamepadService");
 984     GamepadService::GetInstance()->Terminate();
 985   }
 986   {
 987     TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:SensorService");
 988     DeviceInertialSensorService::GetInstance()->Shutdown();
 989   }
 990   {
 991     TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:BatteryStatusService");
 992     device::BatteryStatusService::GetInstance()->Shutdown();
 993   }
 994   {
 995     TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:DeleteDataSources");
 996     URLDataManager::DeleteDataSources();
 997   }
 998 #endif  // !defined(OS_IOS)
 999
1000   if (parts_) {
1001     TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:PostDestroyThreads");
1002     parts_->PostDestroyThreads();
1003   }
1004 }
1005
1006 void BrowserMainLoop::StopStartupTracingTimer() {
1007   startup_trace_timer_.Stop();
1008 }
1009
1010 void BrowserMainLoop::InitializeMainThread() {
1011   TRACE_EVENT0("startup", "BrowserMainLoop::InitializeMainThread");
1012   const char* kThreadName = "CrBrowserMain";
1013   base::PlatformThread::SetName(kThreadName);
1014   if (main_message_loop_)
1015     main_message_loop_->set_thread_name(kThreadName);
1016
1017   // Register the main thread by instantiating it, but don't call any methods.
1018   main_thread_.reset(
1019       new BrowserThreadImpl(BrowserThread::UI, base::MessageLoop::current()));
1020 }
1021
1022 int BrowserMainLoop::BrowserThreadsStarted() {
1023   TRACE_EVENT0("startup", "BrowserMainLoop::BrowserThreadsStarted");
1024
1025 #if !defined(OS_IOS)
1026   indexed_db_thread_.reset(new base::Thread("IndexedDB"));
1027   indexed_db_thread_->Start();
1028 #endif
1029
1030 #if !defined(OS_IOS)
1031   HistogramSynchronizer::GetInstance();
1032
1033
1034   // GpuDataManager for in-process initialized in PreCreateThreads.
1035   bool initialize_gpu_data_manager = !UsingInProcessGpu();
1036 #if defined(OS_ANDROID)
1037   // Up the priority of anything that touches with display tasks
1038   // (this thread is UI thread, and io_thread_ is for IPCs).
1039   io_thread_->SetPriority(base::ThreadPriority::DISPLAY);
1040   base::PlatformThread::SetThreadPriority(base::PlatformThread::CurrentHandle(),
1041                                           base::ThreadPriority::DISPLAY);
1042
1043   // On Android, GLSurface::InitializeOneOff() must be called before
1044   // initalizing the GpuDataManagerImpl as it uses the GL bindings.
1045   // TODO(sievers): Shouldn't need to init full bindings to determine GL
1046   // version/vendor strings. crbug.com/326295
1047   if (initialize_gpu_data_manager) {
1048     // Note InitializeOneOff is not safe either for in-process gpu after
1049     // creating threads, since it may race with the gpu thread.
1050     if (!gfx::GLSurface::InitializeOneOff()) {
1051       LOG(FATAL) << "GLSurface::InitializeOneOff failed";
1052     }
1053   }
1054 #endif
1055
1056   if (initialize_gpu_data_manager)
1057     GpuDataManagerImpl::GetInstance()->Initialize();
1058
1059   bool always_uses_gpu = true;
1060   bool established_gpu_channel = false;
1061 #if defined(USE_AURA) || defined(OS_MACOSX)
1062   established_gpu_channel = true;
1063   if (!GpuDataManagerImpl::GetInstance()->CanUseGpuBrowserCompositor() ||
1064       parsed_command_line_.HasSwitch(switches::kDisableGpuEarlyInit)) {
1065     established_gpu_channel = always_uses_gpu = false;
1066   }
1067   BrowserGpuChannelHostFactory::Initialize(established_gpu_channel);
1068   ImageTransportFactory::Initialize();
1069 #if defined(USE_AURA)
1070   if (aura::Env::GetInstance()) {
1071     aura::Env::GetInstance()->set_context_factory(GetContextFactory());
1072   }
1073 #endif
1074 #elif defined(OS_ANDROID)
1075   // TODO(crbug.com/439322): This should be set to |true|.
1076   established_gpu_channel = false;
1077   BrowserGpuChannelHostFactory::Initialize(established_gpu_channel);
1078 #endif
1079
1080   {
1081     TRACE_EVENT0("startup", "BrowserThreadsStarted::Subsystem:AudioMan");
1082     audio_manager_.reset(media::AudioManager::CreateWithHangTimer(
1083         MediaInternals::GetInstance(), io_thread_->task_runner()));
1084   }
1085
1086   {
1087     TRACE_EVENT0("startup", "BrowserThreadsStarted::Subsystem:MidiManager");
1088     midi_manager_.reset(media::MidiManager::Create());
1089   }
1090
1091 #if defined(OS_LINUX) && defined(USE_UDEV)
1092   device_monitor_linux_.reset(new DeviceMonitorLinux());
1093 #elif defined(OS_MACOSX)
1094   device_monitor_mac_.reset(new DeviceMonitorMac());
1095 #endif
1096
1097 #if defined(OS_WIN)
1098   UMA_HISTOGRAM_BOOLEAN("Windows.Win32kRendererLockdown",
1099                         IsWin32kRendererLockdownEnabled());
1100 #endif
1101   // RDH needs the IO thread to be created
1102   {
1103     TRACE_EVENT0("startup",
1104       "BrowserMainLoop::BrowserThreadsStarted:InitResourceDispatcherHost");
1105     resource_dispatcher_host_.reset(new ResourceDispatcherHostImpl());
1106   }
1107
1108   // MediaStreamManager needs the IO thread to be created.
1109   {
1110     TRACE_EVENT0("startup",
1111       "BrowserMainLoop::BrowserThreadsStarted:InitMediaStreamManager");
1112     media_stream_manager_.reset(new MediaStreamManager(audio_manager_.get()));
1113   }
1114
1115   {
1116     TRACE_EVENT0("startup",
1117       "BrowserMainLoop::BrowserThreadsStarted:InitSpeechRecognition");
1118     speech_recognition_manager_.reset(new SpeechRecognitionManagerImpl(
1119         audio_manager_.get(), media_stream_manager_.get()));
1120   }
1121
1122   {
1123     TRACE_EVENT0(
1124         "startup",
1125         "BrowserMainLoop::BrowserThreadsStarted::InitUserInputMonitor");
1126     user_input_monitor_ = media::UserInputMonitor::Create(
1127         io_thread_->message_loop_proxy(), main_thread_->message_loop_proxy());
1128   }
1129
1130   {
1131     TRACE_EVENT0("startup",
1132                  "BrowserMainLoop::BrowserThreadsStarted::TimeZoneMonitor");
1133     time_zone_monitor_ = TimeZoneMonitor::Create();
1134   }
1135
1136   // Alert the clipboard class to which threads are allowed to access the
1137   // clipboard:
1138   std::vector<base::PlatformThreadId> allowed_clipboard_threads;
1139   // The current thread is the UI thread.
1140   allowed_clipboard_threads.push_back(base::PlatformThread::CurrentId());
1141 #if defined(OS_WIN)
1142   // On Windows, clipboards are also used on the File or IO threads.
1143   allowed_clipboard_threads.push_back(file_thread_->thread_id());
1144   allowed_clipboard_threads.push_back(io_thread_->thread_id());
1145 #endif
1146   ui::Clipboard::SetAllowedThreads(allowed_clipboard_threads);
1147
1148   // When running the GPU thread in-process, avoid optimistically starting it
1149   // since creating the GPU thread races against creation of the one-and-only
1150   // ChildProcess instance which is created by the renderer thread.
1151   if (GpuDataManagerImpl::GetInstance()->GpuAccessAllowed(NULL) &&
1152       !established_gpu_channel &&
1153       always_uses_gpu &&
1154       !UsingInProcessGpu()) {
1155     TRACE_EVENT_INSTANT0("gpu", "Post task to launch GPU process",
1156                          TRACE_EVENT_SCOPE_THREAD);
1157     BrowserThread::PostTask(
1158         BrowserThread::IO, FROM_HERE, base::Bind(
1159             base::IgnoreResult(&GpuProcessHost::Get),
1160             GpuProcessHost::GPU_PROCESS_KIND_SANDBOXED,
1161             CAUSE_FOR_GPU_LAUNCH_BROWSER_STARTUP));
1162   }
1163
1164 #if defined(OS_MACOSX)
1165   ThemeHelperMac::GetInstance();
1166   SystemHotkeyHelperMac::GetInstance()->DeferredLoadSystemHotkeys();
1167   if (ShouldEnableBootstrapSandbox()) {
1168     TRACE_EVENT0("startup",
1169         "BrowserMainLoop::BrowserThreadsStarted:BootstrapSandbox");
1170     CHECK(GetBootstrapSandbox());
1171   }
1172 #endif  // defined(OS_MACOSX)
1173
1174 #endif  // !defined(OS_IOS)
1175
1176   return result_code_;
1177 }
1178
1179 bool BrowserMainLoop::UsingInProcessGpu() const {
1180   return parsed_command_line_.HasSwitch(switches::kSingleProcess) ||
1181          parsed_command_line_.HasSwitch(switches::kInProcessGPU);
1182 }
1183
1184 bool BrowserMainLoop::InitializeToolkit() {
1185   TRACE_EVENT0("startup", "BrowserMainLoop::InitializeToolkit");
1186   // TODO(evan): this function is rather subtle, due to the variety
1187   // of intersecting ifdefs we have.  To keep it easy to follow, there
1188   // are no #else branches on any #ifs.
1189   // TODO(stevenjb): Move platform specific code into platform specific Parts
1190   // (Need to add InitializeToolkit stage to BrowserParts).
1191   // See also GTK setup in EarlyInitialization, above, and associated comments.
1192
1193 #if defined(OS_WIN)
1194   // Init common control sex.
1195   INITCOMMONCONTROLSEX config;
1196   config.dwSize = sizeof(config);
1197   config.dwICC = ICC_WIN95_CLASSES;
1198   if (!InitCommonControlsEx(&config))
1199     PLOG(FATAL);
1200 #endif
1201
1202 #if defined(USE_AURA)
1203
1204 #if defined(USE_X11)
1205   if (!gfx::GetXDisplay())
1206     return false;
1207 #endif
1208
1209   // Env creates the compositor. Aura widgets need the compositor to be created
1210   // before they can be initialized by the browser.
1211   aura::Env::CreateInstance(true);
1212 #endif  // defined(USE_AURA)
1213
1214   if (parts_)
1215     parts_->ToolkitInitialized();
1216
1217   return true;
1218 }
1219
1220 void BrowserMainLoop::MainMessageLoopRun() {
1221 #if defined(OS_ANDROID)
1222   // Android's main message loop is the Java message loop.
1223   NOTREACHED();
1224 #else
1225   DCHECK(base::MessageLoopForUI::IsCurrent());
1226   if (parameters_.ui_task)
1227     base::MessageLoopForUI::current()->PostTask(FROM_HERE,
1228                                                 *parameters_.ui_task);
1229
1230   base::RunLoop run_loop;
1231   run_loop.Run();
1232 #endif
1233 }
1234
1235 base::FilePath BrowserMainLoop::GetStartupTraceFileName(
1236     const base::CommandLine& command_line) const {
1237   base::FilePath trace_file = command_line.GetSwitchValuePath(
1238       switches::kTraceStartupFile);
1239   // trace_file = "none" means that startup events will show up for the next
1240   // begin/end tracing (via about:tracing or AutomationProxy::BeginTracing/
1241   // EndTracing, for example).
1242   if (trace_file == base::FilePath().AppendASCII("none"))
1243     return trace_file;
1244
1245   if (trace_file.empty()) {
1246 #if defined(OS_ANDROID)
1247     TracingControllerAndroid::GenerateTracingFilePath(&trace_file);
1248 #else
1249     // Default to saving the startup trace into the current dir.
1250     trace_file = base::FilePath().AppendASCII("chrometrace.log");
1251 #endif
1252   }
1253
1254   return trace_file;
1255 }
1256
1257 void BrowserMainLoop::InitStartupTracing(
1258     const base::CommandLine& command_line) {
1259   DCHECK(is_tracing_startup_);
1260
1261   startup_trace_file_ = GetStartupTraceFileName(parsed_command_line_);
1262
1263   std::string delay_str = command_line.GetSwitchValueASCII(
1264       switches::kTraceStartupDuration);
1265   int delay_secs = 5;
1266   if (!delay_str.empty() && !base::StringToInt(delay_str, &delay_secs)) {
1267     DLOG(WARNING) << "Could not parse --" << switches::kTraceStartupDuration
1268         << "=" << delay_str << " defaulting to 5 (secs)";
1269     delay_secs = 5;
1270   }
1271
1272   startup_trace_timer_.Start(FROM_HERE,
1273                              base::TimeDelta::FromSeconds(delay_secs),
1274                              this,
1275                              &BrowserMainLoop::EndStartupTracing);
1276 }
1277
1278 void BrowserMainLoop::EndStartupTracing() {
1279   is_tracing_startup_ = false;
1280   TracingController::GetInstance()->DisableRecording(
1281       TracingController::CreateFileSink(
1282           startup_trace_file_,
1283           base::Bind(OnStoppedStartupTracing, startup_trace_file_)));
1284 }
1285
1286 }  // namespace content