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/profiler/scoped_profile.h"
  18 #include "base/run_loop.h"
  19 #include "base/strings/string_number_conversions.h"
  20 #include "base/system_monitor/system_monitor.h"
  21 #include "base/thread_task_runner_handle.h"
  22 #include "base/threading/thread_restrictions.h"
  23 #include "base/timer/hi_res_timer_manager.h"
  24 #include "base/trace_event/memory_dump_manager.h"
  25 #include "base/trace_event/trace_event.h"
  26 #include "content/browser/browser_thread_impl.h"
  27 #include "content/browser/device_sensors/device_inertial_sensor_service.h"
  28 #include "content/browser/download/save_file_manager.h"
  29 #include "content/browser/gamepad/gamepad_service.h"
  30 #include "content/browser/gpu/browser_gpu_channel_host_factory.h"
  31 #include "content/browser/gpu/compositor_util.h"
  32 #include "content/browser/gpu/gpu_data_manager_impl.h"
  33 #include "content/browser/gpu/gpu_process_host.h"
  34 #include "content/browser/gpu/gpu_process_host_ui_shim.h"
  35 #include "content/browser/histogram_synchronizer.h"
  36 #include "content/browser/loader/resource_dispatcher_host_impl.h"
  37 #include "content/browser/media/media_internals.h"
  38 #include "content/browser/net/browser_online_state_observer.h"
  39 #include "content/browser/renderer_host/media/media_stream_manager.h"
  40 #include "content/browser/speech/speech_recognition_manager_impl.h"
  41 #include "content/browser/startup_task_runner.h"
  42 #include "content/browser/time_zone_monitor.h"
  43 #include "content/browser/webui/content_web_ui_controller_factory.h"
  44 #include "content/browser/webui/url_data_manager.h"
  45 #include "content/common/content_switches_internal.h"
  46 #include "content/common/host_discardable_shared_memory_manager.h"
  47 #include "content/public/browser/browser_main_parts.h"
  48 #include "content/public/browser/browser_shutdown.h"
  49 #include "content/public/browser/content_browser_client.h"
  50 #include "content/public/browser/render_process_host.h"
  51 #include "content/public/browser/tracing_controller.h"
  52 #include "content/public/common/content_switches.h"
  53 #include "content/public/common/main_function_params.h"
  54 #include "content/public/common/result_codes.h"
  55 #include "crypto/nss_util.h"
  56 #include "device/battery/battery_status_service.h"
  57 #include "media/audio/audio_manager.h"
  58 #include "media/base/media.h"
  59 #include "media/base/user_input_monitor.h"
  60 #include "media/midi/midi_manager.h"
  61 #include "net/base/network_change_notifier.h"
  62 #include "net/socket/client_socket_factory.h"
  63 #include "net/ssl/ssl_config_service.h"
  64 #include "ui/base/clipboard/clipboard.h"
  65
  66 #if defined(USE_AURA) || (defined(OS_MACOSX) && !defined(OS_IOS))
  67 #include "content/browser/compositor/image_transport_factory.h"
  68 #endif
  69
  70 #if defined(USE_AURA)
  71 #include "content/public/browser/context_factory.h"
  72 #include "ui/aura/env.h"
  73 #endif
  74
  75 #if !defined(OS_IOS)
  76 #include "content/browser/renderer_host/render_process_host_impl.h"
  77 #endif
  78
  79 #if defined(OS_ANDROID)
  80 #include "base/android/jni_android.h"
  81 #include "content/browser/android/browser_startup_controller.h"
  82 #include "content/browser/android/browser_surface_texture_manager.h"
  83 #include "content/browser/android/tracing_controller_android.h"
  84 #include "content/browser/screen_orientation/screen_orientation_delegate_android.h"
  85 #include "content/public/browser/screen_orientation_provider.h"
  86 #include "ui/gl/gl_surface.h"
  87 #endif
  88
  89 #if defined(OS_MACOSX) && !defined(OS_IOS)
  90 #include "content/browser/bootstrap_sandbox_mac.h"
  91 #include "content/browser/cocoa/system_hotkey_helper_mac.h"
  92 #include "content/browser/compositor/browser_compositor_view_mac.h"
  93 #include "content/browser/theme_helper_mac.h"
  94 #endif
  95
  96 #if defined(OS_WIN)
  97 #include <windows.h>
  98 #include <commctrl.h>
  99 #include <shellapi.h>
 100
 101 #include "content/browser/system_message_window_win.h"
 102 #include "content/common/sandbox_win.h"
 103 #include "net/base/winsock_init.h"
 104 #include "ui/base/l10n/l10n_util_win.h"
 105 #endif
 106
 107 #if defined(OS_CHROMEOS)
 108 #include "base/chromeos/memory_pressure_monitor_chromeos.h"
 109 #include "chromeos/chromeos_switches.h"
 110 #endif
 111
 112 #if defined(USE_GLIB)
 113 #include <glib-object.h>
 114 #endif
 115
 116 #if defined(OS_LINUX) && defined(USE_UDEV)
 117 #include "content/browser/device_monitor_udev.h"
 118 #elif defined(OS_MACOSX) && !defined(OS_IOS)
 119 #include "content/browser/device_monitor_mac.h"
 120 #endif
 121
 122 #if defined(OS_POSIX) && !defined(OS_MACOSX)
 123 #include "content/browser/renderer_host/render_sandbox_host_linux.h"
 124 #include "content/browser/zygote_host/zygote_host_impl_linux.h"
 125 #include "sandbox/linux/suid/client/setuid_sandbox_host.h"
 126 #endif
 127
 128 #if defined(ENABLE_PLUGINS)
 129 #include "content/browser/plugin_service_impl.h"
 130 #endif
 131
 132 #if defined(TCMALLOC_TRACE_MEMORY_SUPPORTED)
 133 #include "third_party/tcmalloc/chromium/src/gperftools/heap-profiler.h"
 134 #endif
 135
 136 #if defined(USE_X11)
 137 #include "ui/gfx/x/x11_connection.h"
 138 #include "ui/gfx/x/x11_types.h"
 139 #endif
 140
 141 // One of the linux specific headers defines this as a macro.
 142 #ifdef DestroyAll
 143 #undef DestroyAll
 144 #endif
 145
 146 namespace content {
 147 namespace {
 148
 149 #if defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
 150 void SetupSandbox(const base::CommandLine& parsed_command_line) {
 151   TRACE_EVENT0("startup", "SetupSandbox");
 152   base::FilePath sandbox_binary;
 153
 154   scoped_ptr<sandbox::SetuidSandboxHost> setuid_sandbox_host(
 155       sandbox::SetuidSandboxHost::Create());
 156
 157   const bool want_setuid_sandbox =
 158       !parsed_command_line.HasSwitch(switches::kNoSandbox) &&
 159       !parsed_command_line.HasSwitch(switches::kDisableSetuidSandbox) &&
 160       !setuid_sandbox_host->IsDisabledViaEnvironment();
 161
 162   static const char no_suid_error[] =
 163       "Running without the SUID sandbox! See "
 164       "https://code.google.com/p/chromium/wiki/LinuxSUIDSandboxDevelopment "
 165       "for more information on developing with the sandbox on.";
 166   if (want_setuid_sandbox) {
 167     sandbox_binary = setuid_sandbox_host->GetSandboxBinaryPath();
 168     if (sandbox_binary.empty()) {
 169       // This needs to be fatal. Talk to security@chromium.org if you feel
 170       // otherwise.
 171       LOG(FATAL) << no_suid_error;
 172     }
 173   } else {
 174     LOG(ERROR) << no_suid_error;
 175   }
 176
 177   // Tickle the sandbox host and zygote host so they fork now.
 178   RenderSandboxHostLinux::GetInstance()->Init();
 179   ZygoteHostImpl::GetInstance()->Init(sandbox_binary.value());
 180 }
 181 #endif
 182
 183 #if defined(USE_GLIB)
 184 static void GLibLogHandler(const gchar* log_domain,
 185                            GLogLevelFlags log_level,
 186                            const gchar* message,
 187                            gpointer userdata) {
 188   if (!log_domain)
 189     log_domain = "<unknown>";
 190   if (!message)
 191     message = "<no message>";
 192
 193   if (strstr(message, "Unable to retrieve the file info for")) {
 194     LOG(ERROR) << "GTK File code error: " << message;
 195   } else if (strstr(message, "Could not find the icon") &&
 196              strstr(log_domain, "Gtk")) {
 197     LOG(ERROR) << "GTK icon error: " << message;
 198   } else if (strstr(message, "Theme file for default has no") ||
 199              strstr(message, "Theme directory") ||
 200              strstr(message, "theme pixmap") ||
 201              strstr(message, "locate theme engine")) {
 202     LOG(ERROR) << "GTK theme error: " << message;
 203   } else if (strstr(message, "Unable to create Ubuntu Menu Proxy") &&
 204              strstr(log_domain, "<unknown>")) {
 205     LOG(ERROR) << "GTK menu proxy create failed";
 206   } else if (strstr(message, "Out of memory") &&
 207              strstr(log_domain, "<unknown>")) {
 208     LOG(ERROR) << "DBus call timeout or out of memory: "
 209                << "http://crosbug.com/15496";
 210   } else if (strstr(message, "Could not connect: Connection refused") &&
 211              strstr(log_domain, "<unknown>")) {
 212     LOG(ERROR) << "DConf settings backend could not connect to session bus: "
 213                << "http://crbug.com/179797";
 214   } else if (strstr(message, "Attempting to store changes into") ||
 215              strstr(message, "Attempting to set the permissions of")) {
 216     LOG(ERROR) << message << " (http://bugs.chromium.org/161366)";
 217   } else if (strstr(message, "drawable is not a native X11 window")) {
 218     LOG(ERROR) << message << " (http://bugs.chromium.org/329991)";
 219   } else {
 220     LOG(DFATAL) << log_domain << ": " << message;
 221   }
 222 }
 223
 224 static void SetUpGLibLogHandler() {
 225   // Register GLib-handled assertions to go through our logging system.
 226   const char* kLogDomains[] = { NULL, "Gtk", "Gdk", "GLib", "GLib-GObject" };
 227   for (size_t i = 0; i < arraysize(kLogDomains); i++) {
 228     g_log_set_handler(kLogDomains[i],
 229                       static_cast<GLogLevelFlags>(G_LOG_FLAG_RECURSION |
 230                                                   G_LOG_FLAG_FATAL |
 231                                                   G_LOG_LEVEL_ERROR |
 232                                                   G_LOG_LEVEL_CRITICAL |
 233                                                   G_LOG_LEVEL_WARNING),
 234                       GLibLogHandler,
 235                       NULL);
 236   }
 237 }
 238 #endif
 239
 240 void OnStoppedStartupTracing(const base::FilePath& trace_file) {
 241   VLOG(0) << "Completed startup tracing to " << trace_file.value();
 242 }
 243
 244 // Disable optimizations for this block of functions so the compiler doesn't
 245 // merge them all together. This makes it possible to tell what thread was
 246 // unresponsive by inspecting the callstack.
 247 MSVC_DISABLE_OPTIMIZE()
 248 MSVC_PUSH_DISABLE_WARNING(4748)
 249
 250 NOINLINE void ResetThread_DB(scoped_ptr<BrowserProcessSubThread> thread) {
 251   volatile int inhibit_comdat = __LINE__;
 252   ALLOW_UNUSED_LOCAL(inhibit_comdat);
 253   thread.reset();
 254 }
 255
 256 NOINLINE void ResetThread_FILE(scoped_ptr<BrowserProcessSubThread> thread) {
 257   volatile int inhibit_comdat = __LINE__;
 258   ALLOW_UNUSED_LOCAL(inhibit_comdat);
 259   thread.reset();
 260 }
 261
 262 NOINLINE void ResetThread_FILE_USER_BLOCKING(
 263     scoped_ptr<BrowserProcessSubThread> thread) {
 264   volatile int inhibit_comdat = __LINE__;
 265   ALLOW_UNUSED_LOCAL(inhibit_comdat);
 266   thread.reset();
 267 }
 268
 269 NOINLINE void ResetThread_PROCESS_LAUNCHER(
 270     scoped_ptr<BrowserProcessSubThread> thread) {
 271   volatile int inhibit_comdat = __LINE__;
 272   ALLOW_UNUSED_LOCAL(inhibit_comdat);
 273   thread.reset();
 274 }
 275
 276 NOINLINE void ResetThread_CACHE(scoped_ptr<BrowserProcessSubThread> thread) {
 277   volatile int inhibit_comdat = __LINE__;
 278   ALLOW_UNUSED_LOCAL(inhibit_comdat);
 279   thread.reset();
 280 }
 281
 282 NOINLINE void ResetThread_IO(scoped_ptr<BrowserProcessSubThread> thread) {
 283   volatile int inhibit_comdat = __LINE__;
 284   ALLOW_UNUSED_LOCAL(inhibit_comdat);
 285   thread.reset();
 286 }
 287
 288 #if !defined(OS_IOS)
 289 NOINLINE void ResetThread_IndexedDb(scoped_ptr<base::Thread> thread) {
 290   volatile int inhibit_comdat = __LINE__;
 291   ALLOW_UNUSED_LOCAL(inhibit_comdat);
 292   thread.reset();
 293 }
 294 #endif
 295
 296 MSVC_POP_WARNING()
 297 MSVC_ENABLE_OPTIMIZE();
 298
 299 }  // namespace
 300
 301 // The currently-running BrowserMainLoop.  There can be one or zero.
 302 BrowserMainLoop* g_current_browser_main_loop = NULL;
 303
 304 // This is just to be able to keep ShutdownThreadsAndCleanUp out of
 305 // the public interface of BrowserMainLoop.
 306 class BrowserShutdownImpl {
 307  public:
 308   static void ImmediateShutdownAndExitProcess() {
 309     DCHECK(g_current_browser_main_loop);
 310     g_current_browser_main_loop->ShutdownThreadsAndCleanUp();
 311
 312 #if defined(OS_WIN)
 313     // At this point the message loop is still running yet we've shut everything
 314     // down. If any messages are processed we'll likely crash. Exit now.
 315     ExitProcess(RESULT_CODE_NORMAL_EXIT);
 316 #elif defined(OS_POSIX) && !defined(OS_MACOSX)
 317     _exit(RESULT_CODE_NORMAL_EXIT);
 318 #else
 319     NOTIMPLEMENTED();
 320 #endif
 321   }
 322 };
 323
 324 void ImmediateShutdownAndExitProcess() {
 325   BrowserShutdownImpl::ImmediateShutdownAndExitProcess();
 326 }
 327
 328 // For measuring memory usage after each task. Behind a command line flag.
 329 class BrowserMainLoop::MemoryObserver : public base::MessageLoop::TaskObserver {
 330  public:
 331   MemoryObserver() {}
 332   ~MemoryObserver() override {}
 333
 334   void WillProcessTask(const base::PendingTask& pending_task) override {}
 335
 336   void DidProcessTask(const base::PendingTask& pending_task) override {
 337 #if !defined(OS_IOS)  // No ProcessMetrics on IOS.
 338     scoped_ptr<base::ProcessMetrics> process_metrics(
 339         base::ProcessMetrics::CreateProcessMetrics(
 340 #if defined(OS_MACOSX)
 341             base::GetCurrentProcessHandle(), NULL));
 342 #else
 343             base::GetCurrentProcessHandle()));
 344 #endif
 345     size_t private_bytes;
 346     process_metrics->GetMemoryBytes(&private_bytes, NULL);
 347     LOCAL_HISTOGRAM_MEMORY_KB("Memory.BrowserUsed", private_bytes >> 10);
 348 #endif
 349   }
 350  private:
 351   DISALLOW_COPY_AND_ASSIGN(MemoryObserver);
 352 };
 353
 354
 355 // BrowserMainLoop construction / destruction =============================
 356
 357 BrowserMainLoop* BrowserMainLoop::GetInstance() {
 358   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 359   return g_current_browser_main_loop;
 360 }
 361
 362 BrowserMainLoop::BrowserMainLoop(const MainFunctionParams& parameters)
 363     : parameters_(parameters),
 364       parsed_command_line_(parameters.command_line),
 365       result_code_(RESULT_CODE_NORMAL_EXIT),
 366       created_threads_(false),
 367       // ContentMainRunner should have enabled tracing of the browser process
 368       // when kTraceStartup is in the command line.
 369       is_tracing_startup_(
 370           parameters.command_line.HasSwitch(switches::kTraceStartup)) {
 371   DCHECK(!g_current_browser_main_loop);
 372   g_current_browser_main_loop = this;
 373 }
 374
 375 BrowserMainLoop::~BrowserMainLoop() {
 376   DCHECK_EQ(this, g_current_browser_main_loop);
 377 #if !defined(OS_IOS)
 378   ui::Clipboard::DestroyClipboardForCurrentThread();
 379 #endif  // !defined(OS_IOS)
 380   g_current_browser_main_loop = NULL;
 381 }
 382
 383 void BrowserMainLoop::Init() {
 384   TRACE_EVENT0("startup", "BrowserMainLoop::Init");
 385   TRACK_SCOPED_REGION("Startup", "BrowserMainLoop::Init");
 386
 387   parts_.reset(
 388       GetContentClient()->browser()->CreateBrowserMainParts(parameters_));
 389 }
 390
 391 // BrowserMainLoop stages ==================================================
 392
 393 void BrowserMainLoop::EarlyInitialization() {
 394   TRACE_EVENT0("startup", "BrowserMainLoop::EarlyInitialization");
 395   TRACK_SCOPED_REGION("Startup", "BrowserMainLoop::EarlyInitialization");
 396
 397 #if defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
 398   // No thread should be created before this call, as SetupSandbox()
 399   // will end-up using fork().
 400   SetupSandbox(parsed_command_line_);
 401 #endif
 402
 403 #if defined(USE_X11)
 404   if (UsingInProcessGpu()) {
 405     if (!gfx::InitializeThreadedX11()) {
 406       LOG(ERROR) << "Failed to put Xlib into threaded mode.";
 407     }
 408   }
 409 #endif
 410
 411   // GLib's spawning of new processes is buggy, so it's important that at this
 412   // point GLib does not need to start DBUS. Chrome should always start with
 413   // DBUS_SESSION_BUS_ADDRESS properly set. See crbug.com/309093.
 414 #if defined(USE_GLIB)
 415   // g_type_init will be deprecated in 2.36. 2.35 is the development
 416   // version for 2.36, hence do not call g_type_init starting 2.35.
 417   // http://developer.gnome.org/gobject/unstable/gobject-Type-Information.html#g-type-init
 418 #if !GLIB_CHECK_VERSION(2, 35, 0)
 419   // GLib type system initialization. Needed at least for gconf,
 420   // used in net/proxy/proxy_config_service_linux.cc. Most likely
 421   // this is superfluous as gtk_init() ought to do this. It's
 422   // definitely harmless, so retained as a reminder of this
 423   // requirement for gconf.
 424   g_type_init();
 425 #endif
 426
 427   SetUpGLibLogHandler();
 428 #endif
 429
 430   if (parts_)
 431     parts_->PreEarlyInitialization();
 432
 433 #if defined(OS_MACOSX)
 434   // We use quite a few file descriptors for our IPC, and the default limit on
 435   // the Mac is low (256), so bump it up.
 436   base::SetFdLimit(1024);
 437 #endif
 438
 439 #if defined(OS_WIN)
 440   net::EnsureWinsockInit();
 441 #endif
 442
 443 #if !defined(USE_OPENSSL)
 444   // We want to be sure to init NSPR on the main thread.
 445   crypto::EnsureNSPRInit();
 446 #endif  // !defined(USE_OPENSSL)
 447
 448 #if !defined(OS_IOS)
 449   if (parsed_command_line_.HasSwitch(switches::kRendererProcessLimit)) {
 450     std::string limit_string = parsed_command_line_.GetSwitchValueASCII(
 451         switches::kRendererProcessLimit);
 452     size_t process_limit;
 453     if (base::StringToSizeT(limit_string, &process_limit)) {
 454       RenderProcessHost::SetMaxRendererProcessCount(process_limit);
 455     }
 456   }
 457 #endif  // !defined(OS_IOS)
 458
 459   if (parsed_command_line_.HasSwitch(switches::kEnableNativeGpuMemoryBuffers)) {
 460     BrowserGpuChannelHostFactory::EnableGpuMemoryBufferFactoryUsage(
 461         gfx::GpuMemoryBuffer::MAP);
 462   }
 463
 464 #if defined(USE_OZONE)
 465   BrowserGpuChannelHostFactory::EnableGpuMemoryBufferFactoryUsage(
 466       gfx::GpuMemoryBuffer::SCANOUT);
 467 #endif
 468
 469   base::DiscardableMemoryAllocator::SetInstance(
 470       HostDiscardableSharedMemoryManager::current());
 471
 472   if (parts_)
 473     parts_->PostEarlyInitialization();
 474 }
 475
 476 void BrowserMainLoop::MainMessageLoopStart() {
 477   TRACE_EVENT0("startup", "BrowserMainLoop::MainMessageLoopStart");
 478   TRACK_SCOPED_REGION("Startup", "BrowserMainLoop::MainMessageLoopStart");
 479
 480   if (parts_) {
 481     TRACE_EVENT0("startup",
 482         "BrowserMainLoop::MainMessageLoopStart:PreMainMessageLoopStart");
 483     parts_->PreMainMessageLoopStart();
 484   }
 485
 486 #if defined(OS_WIN)
 487   // If we're running tests (ui_task is non-null), then the ResourceBundle
 488   // has already been initialized.
 489   if (!parameters_.ui_task) {
 490     // Override the configured locale with the user's preferred UI language.
 491     l10n_util::OverrideLocaleWithUILanguageList();
 492   }
 493 #endif
 494
 495   // Create a MessageLoop if one does not already exist for the current thread.
 496   if (!base::MessageLoop::current())
 497     main_message_loop_.reset(new base::MessageLoopForUI);
 498
 499   InitializeMainThread();
 500
 501   {
 502     TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:SystemMonitor");
 503     system_monitor_.reset(new base::SystemMonitor);
 504   }
 505   {
 506     TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:PowerMonitor");
 507     scoped_ptr<base::PowerMonitorSource> power_monitor_source(
 508       new base::PowerMonitorDeviceSource());
 509     power_monitor_.reset(new base::PowerMonitor(power_monitor_source.Pass()));
 510   }
 511   {
 512     TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:HighResTimerManager");
 513     hi_res_timer_manager_.reset(new base::HighResolutionTimerManager);
 514   }
 515   {
 516     TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:NetworkChangeNotifier");
 517     network_change_notifier_.reset(net::NetworkChangeNotifier::Create());
 518   }
 519
 520 #if !defined(OS_IOS)
 521   {
 522     TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:MediaFeatures");
 523     media::InitializeCPUSpecificMediaFeatures();
 524   }
 525   {
 526     TRACE_EVENT0("startup",
 527                  "BrowserMainLoop::Subsystem:ContentWebUIController");
 528     WebUIControllerFactory::RegisterFactory(
 529         ContentWebUIControllerFactory::GetInstance());
 530   }
 531
 532   {
 533     TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:OnlineStateObserver");
 534     online_state_observer_.reset(new BrowserOnlineStateObserver);
 535   }
 536
 537   {
 538     system_stats_monitor_.reset(
 539         new base::trace_event::TraceEventSystemStatsMonitor(
 540             base::ThreadTaskRunnerHandle::Get()));
 541   }
 542 #endif  // !defined(OS_IOS)
 543
 544 #if defined(OS_WIN)
 545   system_message_window_.reset(new SystemMessageWindowWin);
 546 #endif
 547
 548   if (parts_)
 549     parts_->PostMainMessageLoopStart();
 550
 551 #if !defined(OS_IOS)
 552   // Start tracing to a file if needed. Only do this after starting the main
 553   // message loop to avoid calling MessagePumpForUI::ScheduleWork() before
 554   // MessagePumpForUI::Start() as it will crash the browser.
 555   if (is_tracing_startup_) {
 556     TRACE_EVENT0("startup", "BrowserMainLoop::InitStartupTracing");
 557     InitStartupTracing(parsed_command_line_);
 558   }
 559 #endif  // !defined(OS_IOS)
 560
 561 #if defined(OS_ANDROID)
 562   {
 563     TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:SurfaceTextureManager");
 564     SurfaceTextureManager::InitInstance(new BrowserSurfaceTextureManager);
 565   }
 566
 567   if (!parsed_command_line_.HasSwitch(
 568       switches::kDisableScreenOrientationLock)) {
 569     TRACE_EVENT0("startup",
 570                  "BrowserMainLoop::Subsystem:ScreenOrientationProvider");
 571     screen_orientation_delegate_.reset(
 572         new ScreenOrientationDelegateAndroid());
 573     ScreenOrientationProvider::SetDelegate(screen_orientation_delegate_.get());
 574   }
 575 #endif
 576
 577   if (parsed_command_line_.HasSwitch(switches::kMemoryMetrics)) {
 578     TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:MemoryObserver");
 579     memory_observer_.reset(new MemoryObserver());
 580     base::MessageLoop::current()->AddTaskObserver(memory_observer_.get());
 581   }
 582
 583   base::trace_event::MemoryDumpManager::GetInstance()->Initialize();
 584
 585 #if defined(TCMALLOC_TRACE_MEMORY_SUPPORTED)
 586   trace_memory_controller_.reset(new base::trace_event::TraceMemoryController(
 587       base::MessageLoop::current()->message_loop_proxy(),
 588       ::HeapProfilerWithPseudoStackStart, ::HeapProfilerStop,
 589       ::GetHeapProfile));
 590 #endif
 591 }
 592
 593 int BrowserMainLoop::PreCreateThreads() {
 594   if (parts_) {
 595     TRACE_EVENT0("startup",
 596         "BrowserMainLoop::CreateThreads:PreCreateThreads");
 597     TRACK_SCOPED_REGION("Startup", "BrowserMainLoop::PreCreateThreads");
 598
 599     result_code_ = parts_->PreCreateThreads();
 600   }
 601
 602 #if defined(OS_CHROMEOS)
 603   if (chromeos::switches::MemoryPressureHandlingEnabled()) {
 604     memory_pressure_monitor_.reset(new base::MemoryPressureMonitorChromeOS(
 605         chromeos::switches::GetMemoryPressureThresholds()));
 606   }
 607 #endif
 608
 609 #if defined(ENABLE_PLUGINS)
 610   // Prior to any processing happening on the io thread, we create the
 611   // plugin service as it is predominantly used from the io thread,
 612   // but must be created on the main thread. The service ctor is
 613   // inexpensive and does not invoke the io_thread() accessor.
 614   {
 615     TRACE_EVENT0("startup", "BrowserMainLoop::CreateThreads:PluginService");
 616     PluginService::GetInstance()->Init();
 617   }
 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 #if !defined(OS_IOS) && (!defined(GOOGLE_CHROME_BUILD) || defined(OS_ANDROID))
 640   // Single-process is an unsupported and not fully tested mode, so
 641   // don't enable it for official Chrome builds (except on Android).
 642   if (parsed_command_line_.HasSwitch(switches::kSingleProcess))
 643     RenderProcessHost::SetRunRendererInProcess(true);
 644 #endif
 645
 646   return result_code_;
 647 }
 648
 649 void BrowserMainLoop::CreateStartupTasks() {
 650   TRACE_EVENT0("startup", "BrowserMainLoop::CreateStartupTasks");
 651   TRACK_SCOPED_REGION("Startup", "BrowserMainLoop::CreateStartupTasks");
 652
 653   // First time through, we really want to create all the tasks
 654   if (!startup_task_runner_.get()) {
 655 #if defined(OS_ANDROID)
 656     startup_task_runner_ = make_scoped_ptr(new StartupTaskRunner(
 657         base::Bind(&BrowserStartupComplete),
 658         base::MessageLoop::current()->message_loop_proxy()));
 659 #else
 660     startup_task_runner_ = make_scoped_ptr(new StartupTaskRunner(
 661         base::Callback<void(int)>(),
 662         base::MessageLoop::current()->message_loop_proxy()));
 663 #endif
 664     StartupTask pre_create_threads =
 665         base::Bind(&BrowserMainLoop::PreCreateThreads, base::Unretained(this));
 666     startup_task_runner_->AddTask(pre_create_threads);
 667
 668     StartupTask create_threads =
 669         base::Bind(&BrowserMainLoop::CreateThreads, base::Unretained(this));
 670     startup_task_runner_->AddTask(create_threads);
 671
 672     StartupTask browser_thread_started = base::Bind(
 673         &BrowserMainLoop::BrowserThreadsStarted, base::Unretained(this));
 674     startup_task_runner_->AddTask(browser_thread_started);
 675
 676     StartupTask pre_main_message_loop_run = base::Bind(
 677         &BrowserMainLoop::PreMainMessageLoopRun, base::Unretained(this));
 678     startup_task_runner_->AddTask(pre_main_message_loop_run);
 679
 680 #if defined(OS_ANDROID)
 681     if (BrowserMayStartAsynchronously()) {
 682       startup_task_runner_->StartRunningTasksAsync();
 683     }
 684 #endif
 685   }
 686 #if defined(OS_ANDROID)
 687   if (!BrowserMayStartAsynchronously()) {
 688     // A second request for asynchronous startup can be ignored, so
 689     // StartupRunningTasksAsync is only called first time through. If, however,
 690     // this is a request for synchronous startup then it must override any
 691     // previous call for async startup, so we call RunAllTasksNow()
 692     // unconditionally.
 693     startup_task_runner_->RunAllTasksNow();
 694   }
 695 #else
 696   startup_task_runner_->RunAllTasksNow();
 697 #endif
 698 }
 699
 700 int BrowserMainLoop::CreateThreads() {
 701   TRACE_EVENT0("startup", "BrowserMainLoop::CreateThreads");
 702   TRACK_SCOPED_REGION("Startup", "BrowserMainLoop::CreateThreads");
 703
 704   base::Thread::Options io_message_loop_options;
 705   io_message_loop_options.message_loop_type = base::MessageLoop::TYPE_IO;
 706   base::Thread::Options ui_message_loop_options;
 707   ui_message_loop_options.message_loop_type = base::MessageLoop::TYPE_UI;
 708
 709   // Start threads in the order they occur in the BrowserThread::ID
 710   // enumeration, except for BrowserThread::UI which is the main
 711   // thread.
 712   //
 713   // Must be size_t so we can increment it.
 714   for (size_t thread_id = BrowserThread::UI + 1;
 715        thread_id < BrowserThread::ID_COUNT;
 716        ++thread_id) {
 717     scoped_ptr<BrowserProcessSubThread>* thread_to_start = NULL;
 718     base::Thread::Options options;
 719
 720     switch (thread_id) {
 721       case BrowserThread::DB:
 722         TRACE_EVENT_BEGIN1("startup",
 723             "BrowserMainLoop::CreateThreads:start",
 724             "Thread", "BrowserThread::DB");
 725         thread_to_start = &db_thread_;
 726         options.timer_slack = base::TIMER_SLACK_MAXIMUM;
 727         break;
 728       case BrowserThread::FILE_USER_BLOCKING:
 729         TRACE_EVENT_BEGIN1("startup",
 730             "BrowserMainLoop::CreateThreads:start",
 731             "Thread", "BrowserThread::FILE_USER_BLOCKING");
 732         thread_to_start = &file_user_blocking_thread_;
 733         break;
 734       case BrowserThread::FILE:
 735         TRACE_EVENT_BEGIN1("startup",
 736             "BrowserMainLoop::CreateThreads:start",
 737             "Thread", "BrowserThread::FILE");
 738         thread_to_start = &file_thread_;
 739 #if defined(OS_WIN)
 740         // On Windows, the FILE thread needs to be have a UI message loop
 741         // which pumps messages in such a way that Google Update can
 742         // communicate back to us.
 743         options = ui_message_loop_options;
 744 #else
 745         options = io_message_loop_options;
 746 #endif
 747         options.timer_slack = base::TIMER_SLACK_MAXIMUM;
 748         break;
 749       case BrowserThread::PROCESS_LAUNCHER:
 750         TRACE_EVENT_BEGIN1("startup",
 751             "BrowserMainLoop::CreateThreads:start",
 752             "Thread", "BrowserThread::PROCESS_LAUNCHER");
 753         thread_to_start = &process_launcher_thread_;
 754         options.timer_slack = base::TIMER_SLACK_MAXIMUM;
 755         break;
 756       case BrowserThread::CACHE:
 757         TRACE_EVENT_BEGIN1("startup",
 758             "BrowserMainLoop::CreateThreads:start",
 759             "Thread", "BrowserThread::CACHE");
 760         thread_to_start = &cache_thread_;
 761         options = io_message_loop_options;
 762         options.timer_slack = base::TIMER_SLACK_MAXIMUM;
 763         break;
 764       case BrowserThread::IO:
 765         TRACE_EVENT_BEGIN1("startup",
 766             "BrowserMainLoop::CreateThreads:start",
 767             "Thread", "BrowserThread::IO");
 768         thread_to_start = &io_thread_;
 769         options = io_message_loop_options;
 770         break;
 771       case BrowserThread::UI:
 772       case BrowserThread::ID_COUNT:
 773       default:
 774         NOTREACHED();
 775         break;
 776     }
 777
 778     BrowserThread::ID id = static_cast<BrowserThread::ID>(thread_id);
 779
 780     if (thread_to_start) {
 781       (*thread_to_start).reset(new BrowserProcessSubThread(id));
 782       if (!(*thread_to_start)->StartWithOptions(options)) {
 783         LOG(FATAL) << "Failed to start the browser thread: id == " << id;
 784       }
 785     } else {
 786       NOTREACHED();
 787     }
 788
 789     TRACE_EVENT_END0("startup", "BrowserMainLoop::CreateThreads:start");
 790   }
 791   created_threads_ = true;
 792   return result_code_;
 793 }
 794
 795 int BrowserMainLoop::PreMainMessageLoopRun() {
 796   if (parts_) {
 797     TRACE_EVENT0("startup",
 798         "BrowserMainLoop::CreateThreads:PreMainMessageLoopRun");
 799     TRACK_SCOPED_REGION(
 800         "Startup", "BrowserMainLoop::PreMainMessageLoopRun");
 801
 802     parts_->PreMainMessageLoopRun();
 803   }
 804
 805   // If the UI thread blocks, the whole UI is unresponsive.
 806   // Do not allow disk IO from the UI thread.
 807   base::ThreadRestrictions::SetIOAllowed(false);
 808   base::ThreadRestrictions::DisallowWaiting();
 809   return result_code_;
 810 }
 811
 812 void BrowserMainLoop::RunMainMessageLoopParts() {
 813   TRACE_EVENT_BEGIN_ETW("BrowserMain:MESSAGE_LOOP", 0, "");
 814
 815   bool ran_main_loop = false;
 816   if (parts_)
 817     ran_main_loop = parts_->MainMessageLoopRun(&result_code_);
 818
 819   if (!ran_main_loop)
 820     MainMessageLoopRun();
 821
 822   TRACE_EVENT_END_ETW("BrowserMain:MESSAGE_LOOP", 0, "");
 823 }
 824
 825 void BrowserMainLoop::ShutdownThreadsAndCleanUp() {
 826   if (!created_threads_) {
 827     // Called early, nothing to do
 828     return;
 829   }
 830   TRACE_EVENT0("shutdown", "BrowserMainLoop::ShutdownThreadsAndCleanUp");
 831
 832   // Teardown may start in PostMainMessageLoopRun, and during teardown we
 833   // need to be able to perform IO.
 834   base::ThreadRestrictions::SetIOAllowed(true);
 835   BrowserThread::PostTask(
 836       BrowserThread::IO, FROM_HERE,
 837       base::Bind(base::IgnoreResult(&base::ThreadRestrictions::SetIOAllowed),
 838                  true));
 839
 840 #if !defined(OS_IOS)
 841   if (RenderProcessHost::run_renderer_in_process())
 842     RenderProcessHostImpl::ShutDownInProcessRenderer();
 843 #endif
 844
 845   if (parts_) {
 846     TRACE_EVENT0("shutdown",
 847                  "BrowserMainLoop::Subsystem:PostMainMessageLoopRun");
 848     parts_->PostMainMessageLoopRun();
 849   }
 850
 851   trace_memory_controller_.reset();
 852   system_stats_monitor_.reset();
 853
 854 #if !defined(OS_IOS)
 855   // Destroying the GpuProcessHostUIShims on the UI thread posts a task to
 856   // delete related objects on the GPU thread. This must be done before
 857   // stopping the GPU thread. The GPU thread will close IPC channels to renderer
 858   // processes so this has to happen before stopping the IO thread.
 859   {
 860     TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:GPUProcessHostShim");
 861     GpuProcessHostUIShim::DestroyAll();
 862   }
 863   // Cancel pending requests and prevent new requests.
 864   if (resource_dispatcher_host_) {
 865     TRACE_EVENT0("shutdown",
 866                  "BrowserMainLoop::Subsystem:ResourceDispatcherHost");
 867     resource_dispatcher_host_.get()->Shutdown();
 868   }
 869
 870 #if defined(OS_CHROMEOS)
 871   memory_pressure_monitor_.reset();
 872 #endif
 873
 874 #if defined(OS_MACOSX)
 875   BrowserCompositorMac::DisableRecyclingForShutdown();
 876 #endif
 877
 878 #if defined(USE_AURA) || defined(OS_MACOSX)
 879   {
 880     TRACE_EVENT0("shutdown",
 881                  "BrowserMainLoop::Subsystem:ImageTransportFactory");
 882     ImageTransportFactory::Terminate();
 883   }
 884 #endif
 885
 886 #if defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
 887   ZygoteHostImpl::GetInstance()->TearDownAfterLastChild();
 888 #endif  // defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
 889
 890   // The device monitors are using |system_monitor_| as dependency, so delete
 891   // them before |system_monitor_| goes away.
 892   // On Mac and windows, the monitor needs to be destroyed on the same thread
 893   // as they were created. On Linux, the monitor will be deleted when IO thread
 894   // goes away.
 895 #if defined(OS_WIN)
 896   system_message_window_.reset();
 897 #elif defined(OS_MACOSX)
 898   device_monitor_mac_.reset();
 899 #endif
 900 #endif  // !defined(OS_IOS)
 901
 902   // Must be size_t so we can subtract from it.
 903   for (size_t thread_id = BrowserThread::ID_COUNT - 1;
 904        thread_id >= (BrowserThread::UI + 1);
 905        --thread_id) {
 906     // Find the thread object we want to stop. Looping over all valid
 907     // BrowserThread IDs and DCHECKing on a missing case in the switch
 908     // statement helps avoid a mismatch between this code and the
 909     // BrowserThread::ID enumeration.
 910     //
 911     // The destruction order is the reverse order of occurrence in the
 912     // BrowserThread::ID list. The rationale for the order is as
 913     // follows (need to be filled in a bit):
 914     //
 915     //
 916     // - The IO thread is the only user of the CACHE thread.
 917     //
 918     // - The PROCESS_LAUNCHER thread must be stopped after IO in case
 919     //   the IO thread posted a task to terminate a process on the
 920     //   process launcher thread.
 921     //
 922     // - (Not sure why DB stops last.)
 923     switch (thread_id) {
 924       case BrowserThread::DB: {
 925         TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:DBThread");
 926         ResetThread_DB(db_thread_.Pass());
 927         break;
 928       }
 929       case BrowserThread::FILE: {
 930         TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:FileThread");
 931 #if !defined(OS_IOS)
 932         // Clean up state that lives on or uses the file_thread_ before
 933         // it goes away.
 934         if (resource_dispatcher_host_)
 935           resource_dispatcher_host_.get()->save_file_manager()->Shutdown();
 936 #endif  // !defined(OS_IOS)
 937         ResetThread_FILE(file_thread_.Pass());
 938         break;
 939       }
 940       case BrowserThread::FILE_USER_BLOCKING: {
 941         TRACE_EVENT0("shutdown",
 942                       "BrowserMainLoop::Subsystem:FileUserBlockingThread");
 943         ResetThread_FILE_USER_BLOCKING(file_user_blocking_thread_.Pass());
 944         break;
 945       }
 946       case BrowserThread::PROCESS_LAUNCHER: {
 947         TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:LauncherThread");
 948         ResetThread_PROCESS_LAUNCHER(process_launcher_thread_.Pass());
 949         break;
 950       }
 951       case BrowserThread::CACHE: {
 952         TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:CacheThread");
 953         ResetThread_CACHE(cache_thread_.Pass());
 954         break;
 955       }
 956       case BrowserThread::IO: {
 957         TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:IOThread");
 958         ResetThread_IO(io_thread_.Pass());
 959         break;
 960       }
 961       case BrowserThread::UI:
 962       case BrowserThread::ID_COUNT:
 963       default:
 964         NOTREACHED();
 965         break;
 966     }
 967   }
 968
 969 #if !defined(OS_IOS)
 970   {
 971     TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:IndexedDBThread");
 972     ResetThread_IndexedDb(indexed_db_thread_.Pass());
 973   }
 974 #endif
 975
 976   // Close the blocking I/O pool after the other threads. Other threads such
 977   // as the I/O thread may need to schedule work like closing files or flushing
 978   // data during shutdown, so the blocking pool needs to be available. There
 979   // may also be slow operations pending that will blcok shutdown, so closing
 980   // it here (which will block until required operations are complete) gives
 981   // more head start for those operations to finish.
 982   {
 983     TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:ThreadPool");
 984     BrowserThreadImpl::ShutdownThreadPool();
 985   }
 986
 987 #if !defined(OS_IOS)
 988   // Must happen after the IO thread is shutdown since this may be accessed from
 989   // it.
 990   {
 991     TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:GPUChannelFactory");
 992     if (BrowserGpuChannelHostFactory::instance())
 993       BrowserGpuChannelHostFactory::Terminate();
 994   }
 995
 996   // Must happen after the I/O thread is shutdown since this class lives on the
 997   // I/O thread and isn't threadsafe.
 998   {
 999     TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:GamepadService");
1000     GamepadService::GetInstance()->Terminate();
1001   }
1002   {
1003     TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:SensorService");
1004     DeviceInertialSensorService::GetInstance()->Shutdown();
1005   }
1006   {
1007     TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:BatteryStatusService");
1008     device::BatteryStatusService::GetInstance()->Shutdown();
1009   }
1010   {
1011     TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:DeleteDataSources");
1012     URLDataManager::DeleteDataSources();
1013   }
1014 #endif  // !defined(OS_IOS)
1015
1016   if (parts_) {
1017     TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:PostDestroyThreads");
1018     parts_->PostDestroyThreads();
1019   }
1020 }
1021
1022 void BrowserMainLoop::StopStartupTracingTimer() {
1023   startup_trace_timer_.Stop();
1024 }
1025
1026 void BrowserMainLoop::InitializeMainThread() {
1027   TRACE_EVENT0("startup", "BrowserMainLoop::InitializeMainThread");
1028   const char* kThreadName = "CrBrowserMain";
1029   base::PlatformThread::SetName(kThreadName);
1030   if (main_message_loop_)
1031     main_message_loop_->set_thread_name(kThreadName);
1032
1033   // Register the main thread by instantiating it, but don't call any methods.
1034   main_thread_.reset(
1035       new BrowserThreadImpl(BrowserThread::UI, base::MessageLoop::current()));
1036 }
1037
1038 int BrowserMainLoop::BrowserThreadsStarted() {
1039   TRACE_EVENT0("startup", "BrowserMainLoop::BrowserThreadsStarted");
1040
1041 #if !defined(OS_IOS)
1042   indexed_db_thread_.reset(new base::Thread("IndexedDB"));
1043   indexed_db_thread_->Start();
1044 #endif
1045
1046 #if !defined(OS_IOS)
1047   HistogramSynchronizer::GetInstance();
1048
1049
1050   // GpuDataManager for in-process initialized in PreCreateThreads.
1051   bool initialize_gpu_data_manager = !UsingInProcessGpu();
1052 #if defined(OS_ANDROID)
1053   // Up the priority of anything that touches with display tasks
1054   // (this thread is UI thread, and io_thread_ is for IPCs).
1055   io_thread_->SetPriority(base::ThreadPriority::DISPLAY);
1056   base::PlatformThread::SetThreadPriority(base::PlatformThread::CurrentHandle(),
1057                                           base::ThreadPriority::DISPLAY);
1058
1059   // On Android, GLSurface::InitializeOneOff() must be called before
1060   // initalizing the GpuDataManagerImpl as it uses the GL bindings.
1061   // TODO(sievers): Shouldn't need to init full bindings to determine GL
1062   // version/vendor strings. crbug.com/326295
1063   if (initialize_gpu_data_manager) {
1064     // Note InitializeOneOff is not safe either for in-process gpu after
1065     // creating threads, since it may race with the gpu thread.
1066     if (!gfx::GLSurface::InitializeOneOff()) {
1067       LOG(FATAL) << "GLSurface::InitializeOneOff failed";
1068     }
1069   }
1070 #endif
1071
1072   if (initialize_gpu_data_manager)
1073     GpuDataManagerImpl::GetInstance()->Initialize();
1074
1075   bool always_uses_gpu = true;
1076   bool established_gpu_channel = false;
1077 #if defined(USE_AURA) || defined(OS_MACOSX)
1078   established_gpu_channel = true;
1079   if (!GpuDataManagerImpl::GetInstance()->CanUseGpuBrowserCompositor() ||
1080       parsed_command_line_.HasSwitch(switches::kDisableGpuEarlyInit)) {
1081     established_gpu_channel = always_uses_gpu = false;
1082   }
1083   BrowserGpuChannelHostFactory::Initialize(established_gpu_channel);
1084   ImageTransportFactory::Initialize();
1085 #if defined(USE_AURA)
1086   if (aura::Env::GetInstance()) {
1087     aura::Env::GetInstance()->set_context_factory(GetContextFactory());
1088   }
1089 #endif
1090 #elif defined(OS_ANDROID)
1091   // TODO(crbug.com/439322): This should be set to |true|.
1092   established_gpu_channel = false;
1093   BrowserGpuChannelHostFactory::Initialize(established_gpu_channel);
1094 #endif
1095
1096   {
1097     TRACE_EVENT0("startup", "BrowserThreadsStarted::Subsystem:AudioMan");
1098     audio_manager_.reset(media::AudioManager::CreateWithHangTimer(
1099         MediaInternals::GetInstance(), io_thread_->task_runner()));
1100   }
1101
1102   {
1103     TRACE_EVENT0("startup", "BrowserThreadsStarted::Subsystem:MidiManager");
1104     midi_manager_.reset(media::MidiManager::Create());
1105   }
1106
1107 #if defined(OS_LINUX) && defined(USE_UDEV)
1108   device_monitor_linux_.reset(new DeviceMonitorLinux());
1109 #elif defined(OS_MACOSX)
1110   device_monitor_mac_.reset(new DeviceMonitorMac());
1111 #endif
1112
1113 #if defined(OS_WIN)
1114   UMA_HISTOGRAM_BOOLEAN("Windows.Win32kRendererLockdown",
1115                         IsWin32kRendererLockdownEnabled());
1116 #endif
1117   // RDH needs the IO thread to be created
1118   {
1119     TRACE_EVENT0("startup",
1120       "BrowserMainLoop::BrowserThreadsStarted:InitResourceDispatcherHost");
1121     resource_dispatcher_host_.reset(new ResourceDispatcherHostImpl());
1122   }
1123
1124   // MediaStreamManager needs the IO thread to be created.
1125   {
1126     TRACE_EVENT0("startup",
1127       "BrowserMainLoop::BrowserThreadsStarted:InitMediaStreamManager");
1128     media_stream_manager_.reset(new MediaStreamManager(audio_manager_.get()));
1129   }
1130
1131   {
1132     TRACE_EVENT0("startup",
1133       "BrowserMainLoop::BrowserThreadsStarted:InitSpeechRecognition");
1134     speech_recognition_manager_.reset(new SpeechRecognitionManagerImpl(
1135         audio_manager_.get(), media_stream_manager_.get()));
1136   }
1137
1138   {
1139     TRACE_EVENT0(
1140         "startup",
1141         "BrowserMainLoop::BrowserThreadsStarted::InitUserInputMonitor");
1142     user_input_monitor_ = media::UserInputMonitor::Create(
1143         io_thread_->message_loop_proxy(), main_thread_->message_loop_proxy());
1144   }
1145
1146   {
1147     TRACE_EVENT0("startup",
1148                  "BrowserMainLoop::BrowserThreadsStarted::TimeZoneMonitor");
1149     time_zone_monitor_ = TimeZoneMonitor::Create();
1150   }
1151
1152   // Alert the clipboard class to which threads are allowed to access the
1153   // clipboard:
1154   std::vector<base::PlatformThreadId> allowed_clipboard_threads;
1155   // The current thread is the UI thread.
1156   allowed_clipboard_threads.push_back(base::PlatformThread::CurrentId());
1157 #if defined(OS_WIN)
1158   // On Windows, clipboards are also used on the File or IO threads.
1159   allowed_clipboard_threads.push_back(file_thread_->thread_id());
1160   allowed_clipboard_threads.push_back(io_thread_->thread_id());
1161 #endif
1162   ui::Clipboard::SetAllowedThreads(allowed_clipboard_threads);
1163
1164   // When running the GPU thread in-process, avoid optimistically starting it
1165   // since creating the GPU thread races against creation of the one-and-only
1166   // ChildProcess instance which is created by the renderer thread.
1167   if (GpuDataManagerImpl::GetInstance()->GpuAccessAllowed(NULL) &&
1168       !established_gpu_channel &&
1169       always_uses_gpu &&
1170       !UsingInProcessGpu()) {
1171     TRACE_EVENT_INSTANT0("gpu", "Post task to launch GPU process",
1172                          TRACE_EVENT_SCOPE_THREAD);
1173     BrowserThread::PostTask(
1174         BrowserThread::IO, FROM_HERE, base::Bind(
1175             base::IgnoreResult(&GpuProcessHost::Get),
1176             GpuProcessHost::GPU_PROCESS_KIND_SANDBOXED,
1177             CAUSE_FOR_GPU_LAUNCH_BROWSER_STARTUP));
1178   }
1179
1180 #if defined(OS_MACOSX)
1181   ThemeHelperMac::GetInstance();
1182   SystemHotkeyHelperMac::GetInstance()->DeferredLoadSystemHotkeys();
1183   if (ShouldEnableBootstrapSandbox()) {
1184     TRACE_EVENT0("startup",
1185         "BrowserMainLoop::BrowserThreadsStarted:BootstrapSandbox");
1186     CHECK(GetBootstrapSandbox());
1187   }
1188 #endif  // defined(OS_MACOSX)
1189
1190 #endif  // !defined(OS_IOS)
1191
1192   return result_code_;
1193 }
1194
1195 bool BrowserMainLoop::UsingInProcessGpu() const {
1196   return parsed_command_line_.HasSwitch(switches::kSingleProcess) ||
1197          parsed_command_line_.HasSwitch(switches::kInProcessGPU);
1198 }
1199
1200 bool BrowserMainLoop::InitializeToolkit() {
1201   TRACE_EVENT0("startup", "BrowserMainLoop::InitializeToolkit");
1202   TRACK_SCOPED_REGION("Startup", "BrowserMainLoop::InitializeToolkit");
1203
1204   // TODO(evan): this function is rather subtle, due to the variety
1205   // of intersecting ifdefs we have.  To keep it easy to follow, there
1206   // are no #else branches on any #ifs.
1207   // TODO(stevenjb): Move platform specific code into platform specific Parts
1208   // (Need to add InitializeToolkit stage to BrowserParts).
1209   // See also GTK setup in EarlyInitialization, above, and associated comments.
1210
1211 #if defined(OS_WIN)
1212   // Init common control sex.
1213   INITCOMMONCONTROLSEX config;
1214   config.dwSize = sizeof(config);
1215   config.dwICC = ICC_WIN95_CLASSES;
1216   if (!InitCommonControlsEx(&config))
1217     PLOG(FATAL);
1218 #endif
1219
1220 #if defined(USE_AURA)
1221
1222 #if defined(USE_X11)
1223   if (!gfx::GetXDisplay())
1224     return false;
1225 #endif
1226
1227   // Env creates the compositor. Aura widgets need the compositor to be created
1228   // before they can be initialized by the browser.
1229   aura::Env::CreateInstance(true);
1230 #endif  // defined(USE_AURA)
1231
1232   if (parts_)
1233     parts_->ToolkitInitialized();
1234
1235   return true;
1236 }
1237
1238 void BrowserMainLoop::MainMessageLoopRun() {
1239 #if defined(OS_ANDROID)
1240   // Android's main message loop is the Java message loop.
1241   NOTREACHED();
1242 #else
1243   DCHECK(base::MessageLoopForUI::IsCurrent());
1244   if (parameters_.ui_task)
1245     base::MessageLoopForUI::current()->PostTask(FROM_HERE,
1246                                                 *parameters_.ui_task);
1247
1248   base::RunLoop run_loop;
1249   run_loop.Run();
1250 #endif
1251 }
1252
1253 base::FilePath BrowserMainLoop::GetStartupTraceFileName(
1254     const base::CommandLine& command_line) const {
1255   base::FilePath trace_file = command_line.GetSwitchValuePath(
1256       switches::kTraceStartupFile);
1257   // trace_file = "none" means that startup events will show up for the next
1258   // begin/end tracing (via about:tracing or AutomationProxy::BeginTracing/
1259   // EndTracing, for example).
1260   if (trace_file == base::FilePath().AppendASCII("none"))
1261     return trace_file;
1262
1263   if (trace_file.empty()) {
1264 #if defined(OS_ANDROID)
1265     TracingControllerAndroid::GenerateTracingFilePath(&trace_file);
1266 #else
1267     // Default to saving the startup trace into the current dir.
1268     trace_file = base::FilePath().AppendASCII("chrometrace.log");
1269 #endif
1270   }
1271
1272   return trace_file;
1273 }
1274
1275 void BrowserMainLoop::InitStartupTracing(
1276     const base::CommandLine& command_line) {
1277   DCHECK(is_tracing_startup_);
1278
1279   startup_trace_file_ = GetStartupTraceFileName(parsed_command_line_);
1280
1281   std::string delay_str = command_line.GetSwitchValueASCII(
1282       switches::kTraceStartupDuration);
1283   int delay_secs = 5;
1284   if (!delay_str.empty() && !base::StringToInt(delay_str, &delay_secs)) {
1285     DLOG(WARNING) << "Could not parse --" << switches::kTraceStartupDuration
1286         << "=" << delay_str << " defaulting to 5 (secs)";
1287     delay_secs = 5;
1288   }
1289
1290   startup_trace_timer_.Start(FROM_HERE,
1291                              base::TimeDelta::FromSeconds(delay_secs),
1292                              this,
1293                              &BrowserMainLoop::EndStartupTracing);
1294 }
1295
1296 void BrowserMainLoop::EndStartupTracing() {
1297   is_tracing_startup_ = false;
1298   TracingController::GetInstance()->DisableRecording(
1299       TracingController::CreateFileSink(
1300           startup_trace_file_,
1301           base::Bind(OnStoppedStartupTracing, startup_trace_file_)));
1302 }
1303
1304 }  // namespace content