content/browser/browser_main_loop.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "content/browser/browser_main_loop.h"
   6
   7 #include "base/bind.h"
   8 #include "base/command_line.h"
   9 #include "base/debug/trace_event.h"
  10 #include "base/files/file_util.h"
  11 #include "base/logging.h"
  12 #include "base/message_loop/message_loop.h"
  13 #include "base/metrics/field_trial.h"
  14 #include "base/metrics/histogram.h"
  15 #include "base/path_service.h"
  16 #include "base/pending_task.h"
  17 #include "base/power_monitor/power_monitor.h"
  18 #include "base/power_monitor/power_monitor_device_source.h"
  19 #include "base/process/process_metrics.h"
  20 #include "base/run_loop.h"
  21 #include "base/strings/string_number_conversions.h"
  22 #include "base/system_monitor/system_monitor.h"
  23 #include "base/thread_task_runner_handle.h"
  24 #include "base/threading/thread_restrictions.h"
  25 #include "base/timer/hi_res_timer_manager.h"
  26 #include "content/browser/battery_status/battery_status_service.h"
  27 #include "content/browser/browser_thread_impl.h"
  28 #include "content/browser/device_sensors/device_inertial_sensor_service.h"
  29 #include "content/browser/download/save_file_manager.h"
  30 #include "content/browser/gamepad/gamepad_service.h"
  31 #include "content/browser/gpu/browser_gpu_channel_host_factory.h"
  32 #include "content/browser/gpu/compositor_util.h"
  33 #include "content/browser/gpu/gpu_data_manager_impl.h"
  34 #include "content/browser/gpu/gpu_process_host.h"
  35 #include "content/browser/gpu/gpu_process_host_ui_shim.h"
  36 #include "content/browser/histogram_synchronizer.h"
  37 #include "content/browser/loader/resource_dispatcher_host_impl.h"
  38 #include "content/browser/media/media_internals.h"
  39 #include "content/browser/net/browser_online_state_observer.h"
  40 #include "content/browser/renderer_host/media/media_stream_manager.h"
  41 #include "content/browser/speech/speech_recognition_manager_impl.h"
  42 #include "content/browser/startup_task_runner.h"
  43 #include "content/browser/time_zone_monitor.h"
  44 #include "content/browser/webui/content_web_ui_controller_factory.h"
  45 #include "content/browser/webui/url_data_manager.h"
  46 #include "content/public/browser/browser_main_parts.h"
  47 #include "content/public/browser/browser_shutdown.h"
  48 #include "content/public/browser/content_browser_client.h"
  49 #include "content/public/browser/render_process_host.h"
  50 #include "content/public/browser/tracing_controller.h"
  51 #include "content/public/common/content_switches.h"
  52 #include "content/public/common/main_function_params.h"
  53 #include "content/public/common/result_codes.h"
  54 #include "crypto/nss_util.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/surface_texture_peer_browser_impl.h"
  81 #include "content/browser/android/tracing_controller_android.h"
  82 #include "ui/gl/gl_surface.h"
  83 #endif
  84
  85 #if defined(OS_MACOSX) && !defined(OS_IOS)
  86 #include "content/browser/bootstrap_sandbox_mac.h"
  87 #include "content/browser/cocoa/system_hotkey_helper_mac.h"
  88 #include "content/browser/theme_helper_mac.h"
  89 #endif
  90
  91 #if defined(OS_WIN)
  92 #include <windows.h>
  93 #include <commctrl.h>
  94 #include <shellapi.h>
  95
  96 #include "content/browser/system_message_window_win.h"
  97 #include "content/common/sandbox_win.h"
  98 #include "net/base/winsock_init.h"
  99 #include "ui/base/l10n/l10n_util_win.h"
 100 #endif
 101
 102 #if defined(USE_GLIB)
 103 #include <glib-object.h>
 104 #endif
 105
 106 #if defined(OS_LINUX) && defined(USE_UDEV)
 107 #include "content/browser/device_monitor_udev.h"
 108 #elif defined(OS_MACOSX) && !defined(OS_IOS)
 109 #include "content/browser/device_monitor_mac.h"
 110 #endif
 111
 112 #if defined(OS_POSIX) && !defined(OS_MACOSX)
 113 #include "content/browser/renderer_host/render_sandbox_host_linux.h"
 114 #include "content/browser/zygote_host/zygote_host_impl_linux.h"
 115 #include "sandbox/linux/suid/client/setuid_sandbox_client.h"
 116 #endif
 117
 118 #if defined(ENABLE_PLUGINS)
 119 #include "content/browser/plugin_service_impl.h"
 120 #endif
 121
 122 #if defined(TCMALLOC_TRACE_MEMORY_SUPPORTED)
 123 #include "third_party/tcmalloc/chromium/src/gperftools/heap-profiler.h"
 124 #endif
 125
 126 #if defined(USE_X11)
 127 #include "ui/gfx/x/x11_connection.h"
 128 #include "ui/gfx/x/x11_types.h"
 129 #endif
 130
 131 // One of the linux specific headers defines this as a macro.
 132 #ifdef DestroyAll
 133 #undef DestroyAll
 134 #endif
 135
 136 namespace content {
 137 namespace {
 138
 139 #if defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
 140 void SetupSandbox(const base::CommandLine& parsed_command_line) {
 141   TRACE_EVENT0("startup", "SetupSandbox");
 142   base::FilePath sandbox_binary;
 143
 144   scoped_ptr<sandbox::SetuidSandboxClient> setuid_sandbox_client(
 145       sandbox::SetuidSandboxClient::Create());
 146
 147   const bool want_setuid_sandbox =
 148       !parsed_command_line.HasSwitch(switches::kNoSandbox) &&
 149       !parsed_command_line.HasSwitch(switches::kDisableSetuidSandbox) &&
 150       !setuid_sandbox_client->IsDisabledViaEnvironment();
 151
 152   static const char no_suid_error[] =
 153       "Running without the SUID sandbox! See "
 154       "https://code.google.com/p/chromium/wiki/LinuxSUIDSandboxDevelopment "
 155       "for more information on developing with the sandbox on.";
 156   if (want_setuid_sandbox) {
 157     sandbox_binary = setuid_sandbox_client->GetSandboxBinaryPath();
 158     if (sandbox_binary.empty()) {
 159       // This needs to be fatal. Talk to security@chromium.org if you feel
 160       // otherwise.
 161       LOG(FATAL) << no_suid_error;
 162     }
 163   } else {
 164     LOG(ERROR) << no_suid_error;
 165   }
 166
 167   // Tickle the sandbox host and zygote host so they fork now.
 168   RenderSandboxHostLinux::GetInstance()->Init();
 169   ZygoteHostImpl::GetInstance()->Init(sandbox_binary.value());
 170 }
 171 #endif
 172
 173 #if defined(USE_GLIB)
 174 static void GLibLogHandler(const gchar* log_domain,
 175                            GLogLevelFlags log_level,
 176                            const gchar* message,
 177                            gpointer userdata) {
 178   if (!log_domain)
 179     log_domain = "<unknown>";
 180   if (!message)
 181     message = "<no message>";
 182
 183   if (strstr(message, "Unable to retrieve the file info for")) {
 184     LOG(ERROR) << "GTK File code error: " << message;
 185   } else if (strstr(message, "Could not find the icon") &&
 186              strstr(log_domain, "Gtk")) {
 187     LOG(ERROR) << "GTK icon error: " << message;
 188   } else if (strstr(message, "Theme file for default has no") ||
 189              strstr(message, "Theme directory") ||
 190              strstr(message, "theme pixmap") ||
 191              strstr(message, "locate theme engine")) {
 192     LOG(ERROR) << "GTK theme error: " << message;
 193   } else if (strstr(message, "Unable to create Ubuntu Menu Proxy") &&
 194              strstr(log_domain, "<unknown>")) {
 195     LOG(ERROR) << "GTK menu proxy create failed";
 196   } else if (strstr(message, "Out of memory") &&
 197              strstr(log_domain, "<unknown>")) {
 198     LOG(ERROR) << "DBus call timeout or out of memory: "
 199                << "http://crosbug.com/15496";
 200   } else if (strstr(message, "Could not connect: Connection refused") &&
 201              strstr(log_domain, "<unknown>")) {
 202     LOG(ERROR) << "DConf settings backend could not connect to session bus: "
 203                << "http://crbug.com/179797";
 204   } else if (strstr(message, "Attempting to store changes into") ||
 205              strstr(message, "Attempting to set the permissions of")) {
 206     LOG(ERROR) << message << " (http://bugs.chromium.org/161366)";
 207   } else if (strstr(message, "drawable is not a native X11 window")) {
 208     LOG(ERROR) << message << " (http://bugs.chromium.org/329991)";
 209   } else {
 210     LOG(DFATAL) << log_domain << ": " << message;
 211   }
 212 }
 213
 214 static void SetUpGLibLogHandler() {
 215   // Register GLib-handled assertions to go through our logging system.
 216   const char* kLogDomains[] = { NULL, "Gtk", "Gdk", "GLib", "GLib-GObject" };
 217   for (size_t i = 0; i < arraysize(kLogDomains); i++) {
 218     g_log_set_handler(kLogDomains[i],
 219                       static_cast<GLogLevelFlags>(G_LOG_FLAG_RECURSION |
 220                                                   G_LOG_FLAG_FATAL |
 221                                                   G_LOG_LEVEL_ERROR |
 222                                                   G_LOG_LEVEL_CRITICAL |
 223                                                   G_LOG_LEVEL_WARNING),
 224                       GLibLogHandler,
 225                       NULL);
 226   }
 227 }
 228 #endif
 229
 230 void OnStoppedStartupTracing(const base::FilePath& trace_file) {
 231   VLOG(0) << "Completed startup tracing to " << trace_file.value();
 232 }
 233
 234 #if defined(USE_AURA)
 235 bool ShouldInitializeBrowserGpuChannelAndTransportSurface() {
 236   return true;
 237 }
 238 #elif defined(OS_MACOSX) && !defined(OS_IOS)
 239 bool ShouldInitializeBrowserGpuChannelAndTransportSurface() {
 240   return IsDelegatedRendererEnabled();
 241 }
 242 #endif
 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   thread.reset();
 252 }
 253
 254 NOINLINE void ResetThread_FILE(scoped_ptr<BrowserProcessSubThread> thread) {
 255   thread.reset();
 256 }
 257
 258 NOINLINE void ResetThread_FILE_USER_BLOCKING(
 259     scoped_ptr<BrowserProcessSubThread> thread) {
 260   thread.reset();
 261 }
 262
 263 NOINLINE void ResetThread_PROCESS_LAUNCHER(
 264     scoped_ptr<BrowserProcessSubThread> thread) {
 265   thread.reset();
 266 }
 267
 268 NOINLINE void ResetThread_CACHE(scoped_ptr<BrowserProcessSubThread> thread) {
 269   thread.reset();
 270 }
 271
 272 NOINLINE void ResetThread_IO(scoped_ptr<BrowserProcessSubThread> thread) {
 273   thread.reset();
 274 }
 275
 276 #if !defined(OS_IOS)
 277 NOINLINE void ResetThread_IndexedDb(scoped_ptr<base::Thread> thread) {
 278   thread.reset();
 279 }
 280 #endif
 281
 282 MSVC_POP_WARNING()
 283 MSVC_ENABLE_OPTIMIZE();
 284
 285 }  // namespace
 286
 287 // The currently-running BrowserMainLoop.  There can be one or zero.
 288 BrowserMainLoop* g_current_browser_main_loop = NULL;
 289
 290 // This is just to be able to keep ShutdownThreadsAndCleanUp out of
 291 // the public interface of BrowserMainLoop.
 292 class BrowserShutdownImpl {
 293  public:
 294   static void ImmediateShutdownAndExitProcess() {
 295     DCHECK(g_current_browser_main_loop);
 296     g_current_browser_main_loop->ShutdownThreadsAndCleanUp();
 297
 298 #if defined(OS_WIN)
 299     // At this point the message loop is still running yet we've shut everything
 300     // down. If any messages are processed we'll likely crash. Exit now.
 301     ExitProcess(RESULT_CODE_NORMAL_EXIT);
 302 #elif defined(OS_POSIX) && !defined(OS_MACOSX)
 303     _exit(RESULT_CODE_NORMAL_EXIT);
 304 #else
 305     NOTIMPLEMENTED();
 306 #endif
 307   }
 308 };
 309
 310 void ImmediateShutdownAndExitProcess() {
 311   BrowserShutdownImpl::ImmediateShutdownAndExitProcess();
 312 }
 313
 314 // For measuring memory usage after each task. Behind a command line flag.
 315 class BrowserMainLoop::MemoryObserver : public base::MessageLoop::TaskObserver {
 316  public:
 317   MemoryObserver() {}
 318   virtual ~MemoryObserver() {}
 319
 320   virtual void WillProcessTask(const base::PendingTask& pending_task) OVERRIDE {
 321   }
 322
 323   virtual void DidProcessTask(const base::PendingTask& pending_task) OVERRIDE {
 324 #if !defined(OS_IOS)  // No ProcessMetrics on IOS.
 325     scoped_ptr<base::ProcessMetrics> process_metrics(
 326         base::ProcessMetrics::CreateProcessMetrics(
 327 #if defined(OS_MACOSX)
 328             base::GetCurrentProcessHandle(), NULL));
 329 #else
 330             base::GetCurrentProcessHandle()));
 331 #endif
 332     size_t private_bytes;
 333     process_metrics->GetMemoryBytes(&private_bytes, NULL);
 334     LOCAL_HISTOGRAM_MEMORY_KB("Memory.BrowserUsed", private_bytes >> 10);
 335 #endif
 336   }
 337  private:
 338   DISALLOW_COPY_AND_ASSIGN(MemoryObserver);
 339 };
 340
 341
 342 // BrowserMainLoop construction / destruction =============================
 343
 344 BrowserMainLoop* BrowserMainLoop::GetInstance() {
 345   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 346   return g_current_browser_main_loop;
 347 }
 348
 349 BrowserMainLoop::BrowserMainLoop(const MainFunctionParams& parameters)
 350     : parameters_(parameters),
 351       parsed_command_line_(parameters.command_line),
 352       result_code_(RESULT_CODE_NORMAL_EXIT),
 353       created_threads_(false),
 354       // ContentMainRunner should have enabled tracing of the browser process
 355       // when kTraceStartup is in the command line.
 356       is_tracing_startup_(
 357           parameters.command_line.HasSwitch(switches::kTraceStartup)) {
 358   DCHECK(!g_current_browser_main_loop);
 359   g_current_browser_main_loop = this;
 360 }
 361
 362 BrowserMainLoop::~BrowserMainLoop() {
 363   DCHECK_EQ(this, g_current_browser_main_loop);
 364 #if !defined(OS_IOS)
 365   ui::Clipboard::DestroyClipboardForCurrentThread();
 366 #endif  // !defined(OS_IOS)
 367   g_current_browser_main_loop = NULL;
 368 }
 369
 370 void BrowserMainLoop::Init() {
 371   TRACE_EVENT0("startup", "BrowserMainLoop::Init");
 372   parts_.reset(
 373       GetContentClient()->browser()->CreateBrowserMainParts(parameters_));
 374 }
 375
 376 // BrowserMainLoop stages ==================================================
 377
 378 void BrowserMainLoop::EarlyInitialization() {
 379   TRACE_EVENT0("startup", "BrowserMainLoop::EarlyInitialization");
 380
 381 #if defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
 382   // No thread should be created before this call, as SetupSandbox()
 383   // will end-up using fork().
 384   SetupSandbox(parsed_command_line_);
 385 #endif
 386
 387 #if defined(USE_X11)
 388   if (parsed_command_line_.HasSwitch(switches::kSingleProcess) ||
 389       parsed_command_line_.HasSwitch(switches::kInProcessGPU)) {
 390     if (!gfx::InitializeThreadedX11()) {
 391       LOG(ERROR) << "Failed to put Xlib into threaded mode.";
 392     }
 393   }
 394 #endif
 395
 396   // GLib's spawning of new processes is buggy, so it's important that at this
 397   // point GLib does not need to start DBUS. Chrome should always start with
 398   // DBUS_SESSION_BUS_ADDRESS properly set. See crbug.com/309093.
 399 #if defined(USE_GLIB)
 400   // g_type_init will be deprecated in 2.36. 2.35 is the development
 401   // version for 2.36, hence do not call g_type_init starting 2.35.
 402   // http://developer.gnome.org/gobject/unstable/gobject-Type-Information.html#g-type-init
 403 #if !GLIB_CHECK_VERSION(2, 35, 0)
 404   // GLib type system initialization. Needed at least for gconf,
 405   // used in net/proxy/proxy_config_service_linux.cc. Most likely
 406   // this is superfluous as gtk_init() ought to do this. It's
 407   // definitely harmless, so retained as a reminder of this
 408   // requirement for gconf.
 409   g_type_init();
 410 #endif
 411
 412   SetUpGLibLogHandler();
 413 #endif
 414
 415   if (parts_)
 416     parts_->PreEarlyInitialization();
 417
 418 #if defined(OS_MACOSX)
 419   // We use quite a few file descriptors for our IPC, and the default limit on
 420   // the Mac is low (256), so bump it up.
 421   base::SetFdLimit(1024);
 422 #endif
 423
 424 #if defined(OS_WIN)
 425   net::EnsureWinsockInit();
 426 #endif
 427
 428 #if !defined(USE_OPENSSL)
 429   // We want to be sure to init NSPR on the main thread.
 430   crypto::EnsureNSPRInit();
 431 #endif  // !defined(USE_OPENSSL)
 432
 433 #if !defined(OS_IOS)
 434   if (parsed_command_line_.HasSwitch(switches::kRendererProcessLimit)) {
 435     std::string limit_string = parsed_command_line_.GetSwitchValueASCII(
 436         switches::kRendererProcessLimit);
 437     size_t process_limit;
 438     if (base::StringToSizeT(limit_string, &process_limit)) {
 439       RenderProcessHost::SetMaxRendererProcessCount(process_limit);
 440     }
 441   }
 442 #endif  // !defined(OS_IOS)
 443
 444   if (parts_)
 445     parts_->PostEarlyInitialization();
 446 }
 447
 448 void BrowserMainLoop::MainMessageLoopStart() {
 449   TRACE_EVENT0("startup", "BrowserMainLoop::MainMessageLoopStart");
 450   if (parts_) {
 451     TRACE_EVENT0("startup",
 452         "BrowserMainLoop::MainMessageLoopStart:PreMainMessageLoopStart");
 453     parts_->PreMainMessageLoopStart();
 454   }
 455
 456 #if defined(OS_WIN)
 457   // If we're running tests (ui_task is non-null), then the ResourceBundle
 458   // has already been initialized.
 459   if (!parameters_.ui_task) {
 460     // Override the configured locale with the user's preferred UI language.
 461     l10n_util::OverrideLocaleWithUILanguageList();
 462   }
 463 #endif
 464
 465   // Create a MessageLoop if one does not already exist for the current thread.
 466   if (!base::MessageLoop::current())
 467     main_message_loop_.reset(new base::MessageLoopForUI);
 468
 469   InitializeMainThread();
 470
 471   {
 472     TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:SystemMonitor");
 473     system_monitor_.reset(new base::SystemMonitor);
 474   }
 475   {
 476     TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:PowerMonitor");
 477     scoped_ptr<base::PowerMonitorSource> power_monitor_source(
 478       new base::PowerMonitorDeviceSource());
 479     power_monitor_.reset(new base::PowerMonitor(power_monitor_source.Pass()));
 480   }
 481   {
 482     TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:HighResTimerManager");
 483     hi_res_timer_manager_.reset(new base::HighResolutionTimerManager);
 484   }
 485   {
 486     TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:NetworkChangeNotifier");
 487     network_change_notifier_.reset(net::NetworkChangeNotifier::Create());
 488   }
 489
 490 #if !defined(OS_IOS)
 491   {
 492     TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:MediaFeatures");
 493     media::InitializeCPUSpecificMediaFeatures();
 494   }
 495   {
 496     TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:AudioMan");
 497     audio_manager_.reset(media::AudioManager::Create(
 498         MediaInternals::GetInstance()));
 499   }
 500   {
 501     TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:MidiManager");
 502     midi_manager_.reset(media::MidiManager::Create());
 503   }
 504   {
 505     TRACE_EVENT0("startup",
 506                  "BrowserMainLoop::Subsystem:ContentWebUIController");
 507     WebUIControllerFactory::RegisterFactory(
 508         ContentWebUIControllerFactory::GetInstance());
 509   }
 510
 511   {
 512     TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:OnlineStateObserver");
 513     online_state_observer_.reset(new BrowserOnlineStateObserver);
 514   }
 515
 516   {
 517     system_stats_monitor_.reset(new base::debug::TraceEventSystemStatsMonitor(
 518         base::ThreadTaskRunnerHandle::Get()));
 519   }
 520 #endif  // !defined(OS_IOS)
 521
 522 #if defined(OS_WIN)
 523   system_message_window_.reset(new SystemMessageWindowWin);
 524 #endif
 525
 526   if (parts_)
 527     parts_->PostMainMessageLoopStart();
 528
 529 #if !defined(OS_IOS)
 530   // Start tracing to a file if needed. Only do this after starting the main
 531   // message loop to avoid calling MessagePumpForUI::ScheduleWork() before
 532   // MessagePumpForUI::Start() as it will crash the browser.
 533   if (is_tracing_startup_) {
 534     TRACE_EVENT0("startup", "BrowserMainLoop::InitStartupTracing");
 535     InitStartupTracing(parsed_command_line_);
 536   }
 537 #endif  // !defined(OS_IOS)
 538
 539 #if defined(OS_ANDROID)
 540   {
 541     TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:SurfaceTexturePeer");
 542     SurfaceTexturePeer::InitInstance(new SurfaceTexturePeerBrowserImpl());
 543   }
 544 #endif
 545
 546   if (parsed_command_line_.HasSwitch(switches::kMemoryMetrics)) {
 547     TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:MemoryObserver");
 548     memory_observer_.reset(new MemoryObserver());
 549     base::MessageLoop::current()->AddTaskObserver(memory_observer_.get());
 550   }
 551
 552 #if defined(TCMALLOC_TRACE_MEMORY_SUPPORTED)
 553   trace_memory_controller_.reset(new base::debug::TraceMemoryController(
 554       base::MessageLoop::current()->message_loop_proxy(),
 555       ::HeapProfilerWithPseudoStackStart,
 556       ::HeapProfilerStop,
 557       ::GetHeapProfile));
 558 #endif
 559 }
 560
 561 int BrowserMainLoop::PreCreateThreads() {
 562   if (parts_) {
 563     TRACE_EVENT0("startup",
 564         "BrowserMainLoop::CreateThreads:PreCreateThreads");
 565     result_code_ = parts_->PreCreateThreads();
 566   }
 567
 568 #if defined(ENABLE_PLUGINS)
 569   // Prior to any processing happening on the io thread, we create the
 570   // plugin service as it is predominantly used from the io thread,
 571   // but must be created on the main thread. The service ctor is
 572   // inexpensive and does not invoke the io_thread() accessor.
 573   {
 574     TRACE_EVENT0("startup", "BrowserMainLoop::CreateThreads:PluginService");
 575     PluginService::GetInstance()->Init();
 576   }
 577 #endif
 578
 579 #if !defined(OS_IOS) && (!defined(GOOGLE_CHROME_BUILD) || defined(OS_ANDROID))
 580   // Single-process is an unsupported and not fully tested mode, so
 581   // don't enable it for official Chrome builds (except on Android).
 582   if (parsed_command_line_.HasSwitch(switches::kSingleProcess))
 583     RenderProcessHost::SetRunRendererInProcess(true);
 584 #endif
 585   return result_code_;
 586 }
 587
 588 void BrowserMainLoop::CreateStartupTasks() {
 589   TRACE_EVENT0("startup", "BrowserMainLoop::CreateStartupTasks");
 590
 591   // First time through, we really want to create all the tasks
 592   if (!startup_task_runner_.get()) {
 593 #if defined(OS_ANDROID)
 594     startup_task_runner_ = make_scoped_ptr(new StartupTaskRunner(
 595         base::Bind(&BrowserStartupComplete),
 596         base::MessageLoop::current()->message_loop_proxy()));
 597 #else
 598     startup_task_runner_ = make_scoped_ptr(new StartupTaskRunner(
 599         base::Callback<void(int)>(),
 600         base::MessageLoop::current()->message_loop_proxy()));
 601 #endif
 602     StartupTask pre_create_threads =
 603         base::Bind(&BrowserMainLoop::PreCreateThreads, base::Unretained(this));
 604     startup_task_runner_->AddTask(pre_create_threads);
 605
 606     StartupTask create_threads =
 607         base::Bind(&BrowserMainLoop::CreateThreads, base::Unretained(this));
 608     startup_task_runner_->AddTask(create_threads);
 609
 610     StartupTask browser_thread_started = base::Bind(
 611         &BrowserMainLoop::BrowserThreadsStarted, base::Unretained(this));
 612     startup_task_runner_->AddTask(browser_thread_started);
 613
 614     StartupTask pre_main_message_loop_run = base::Bind(
 615         &BrowserMainLoop::PreMainMessageLoopRun, base::Unretained(this));
 616     startup_task_runner_->AddTask(pre_main_message_loop_run);
 617
 618 #if defined(OS_ANDROID)
 619     if (BrowserMayStartAsynchronously()) {
 620       startup_task_runner_->StartRunningTasksAsync();
 621     }
 622 #endif
 623   }
 624 #if defined(OS_ANDROID)
 625   if (!BrowserMayStartAsynchronously()) {
 626     // A second request for asynchronous startup can be ignored, so
 627     // StartupRunningTasksAsync is only called first time through. If, however,
 628     // this is a request for synchronous startup then it must override any
 629     // previous call for async startup, so we call RunAllTasksNow()
 630     // unconditionally.
 631     startup_task_runner_->RunAllTasksNow();
 632   }
 633 #else
 634   startup_task_runner_->RunAllTasksNow();
 635 #endif
 636 }
 637
 638 int BrowserMainLoop::CreateThreads() {
 639   TRACE_EVENT0("startup", "BrowserMainLoop::CreateThreads");
 640
 641   base::Thread::Options io_message_loop_options;
 642   io_message_loop_options.message_loop_type = base::MessageLoop::TYPE_IO;
 643   base::Thread::Options ui_message_loop_options;
 644   ui_message_loop_options.message_loop_type = base::MessageLoop::TYPE_UI;
 645
 646   // Start threads in the order they occur in the BrowserThread::ID
 647   // enumeration, except for BrowserThread::UI which is the main
 648   // thread.
 649   //
 650   // Must be size_t so we can increment it.
 651   for (size_t thread_id = BrowserThread::UI + 1;
 652        thread_id < BrowserThread::ID_COUNT;
 653        ++thread_id) {
 654     scoped_ptr<BrowserProcessSubThread>* thread_to_start = NULL;
 655     base::Thread::Options options;
 656
 657     switch (thread_id) {
 658       case BrowserThread::DB:
 659         TRACE_EVENT_BEGIN1("startup",
 660             "BrowserMainLoop::CreateThreads:start",
 661             "Thread", "BrowserThread::DB");
 662         thread_to_start = &db_thread_;
 663         options.timer_slack = base::TIMER_SLACK_MAXIMUM;
 664         break;
 665       case BrowserThread::FILE_USER_BLOCKING:
 666         TRACE_EVENT_BEGIN1("startup",
 667             "BrowserMainLoop::CreateThreads:start",
 668             "Thread", "BrowserThread::FILE_USER_BLOCKING");
 669         thread_to_start = &file_user_blocking_thread_;
 670         break;
 671       case BrowserThread::FILE:
 672         TRACE_EVENT_BEGIN1("startup",
 673             "BrowserMainLoop::CreateThreads:start",
 674             "Thread", "BrowserThread::FILE");
 675         thread_to_start = &file_thread_;
 676 #if defined(OS_WIN)
 677         // On Windows, the FILE thread needs to be have a UI message loop
 678         // which pumps messages in such a way that Google Update can
 679         // communicate back to us.
 680         options = ui_message_loop_options;
 681 #else
 682         options = io_message_loop_options;
 683 #endif
 684         options.timer_slack = base::TIMER_SLACK_MAXIMUM;
 685         break;
 686       case BrowserThread::PROCESS_LAUNCHER:
 687         TRACE_EVENT_BEGIN1("startup",
 688             "BrowserMainLoop::CreateThreads:start",
 689             "Thread", "BrowserThread::PROCESS_LAUNCHER");
 690         thread_to_start = &process_launcher_thread_;
 691         options.timer_slack = base::TIMER_SLACK_MAXIMUM;
 692         break;
 693       case BrowserThread::CACHE:
 694         TRACE_EVENT_BEGIN1("startup",
 695             "BrowserMainLoop::CreateThreads:start",
 696             "Thread", "BrowserThread::CACHE");
 697         thread_to_start = &cache_thread_;
 698         options = io_message_loop_options;
 699         options.timer_slack = base::TIMER_SLACK_MAXIMUM;
 700         break;
 701       case BrowserThread::IO:
 702         TRACE_EVENT_BEGIN1("startup",
 703             "BrowserMainLoop::CreateThreads:start",
 704             "Thread", "BrowserThread::IO");
 705         thread_to_start = &io_thread_;
 706         options = io_message_loop_options;
 707         break;
 708       case BrowserThread::UI:
 709       case BrowserThread::ID_COUNT:
 710       default:
 711         NOTREACHED();
 712         break;
 713     }
 714
 715     BrowserThread::ID id = static_cast<BrowserThread::ID>(thread_id);
 716
 717     if (thread_to_start) {
 718       (*thread_to_start).reset(new BrowserProcessSubThread(id));
 719       (*thread_to_start)->StartWithOptions(options);
 720     } else {
 721       NOTREACHED();
 722     }
 723
 724     TRACE_EVENT_END0("startup", "BrowserMainLoop::CreateThreads:start");
 725   }
 726   created_threads_ = true;
 727   return result_code_;
 728 }
 729
 730 int BrowserMainLoop::PreMainMessageLoopRun() {
 731   if (parts_) {
 732     TRACE_EVENT0("startup",
 733         "BrowserMainLoop::CreateThreads:PreMainMessageLoopRun");
 734     parts_->PreMainMessageLoopRun();
 735   }
 736
 737   // If the UI thread blocks, the whole UI is unresponsive.
 738   // Do not allow disk IO from the UI thread.
 739   base::ThreadRestrictions::SetIOAllowed(false);
 740   base::ThreadRestrictions::DisallowWaiting();
 741   return result_code_;
 742 }
 743
 744 void BrowserMainLoop::RunMainMessageLoopParts() {
 745   TRACE_EVENT_BEGIN_ETW("BrowserMain:MESSAGE_LOOP", 0, "");
 746
 747   bool ran_main_loop = false;
 748   if (parts_)
 749     ran_main_loop = parts_->MainMessageLoopRun(&result_code_);
 750
 751   if (!ran_main_loop)
 752     MainMessageLoopRun();
 753
 754   TRACE_EVENT_END_ETW("BrowserMain:MESSAGE_LOOP", 0, "");
 755 }
 756
 757 void BrowserMainLoop::ShutdownThreadsAndCleanUp() {
 758   if (!created_threads_) {
 759     // Called early, nothing to do
 760     return;
 761   }
 762   TRACE_EVENT0("shutdown", "BrowserMainLoop::ShutdownThreadsAndCleanUp");
 763
 764   // Teardown may start in PostMainMessageLoopRun, and during teardown we
 765   // need to be able to perform IO.
 766   base::ThreadRestrictions::SetIOAllowed(true);
 767   BrowserThread::PostTask(
 768       BrowserThread::IO, FROM_HERE,
 769       base::Bind(base::IgnoreResult(&base::ThreadRestrictions::SetIOAllowed),
 770                  true));
 771
 772 #if !defined(OS_IOS)
 773   if (RenderProcessHost::run_renderer_in_process())
 774     RenderProcessHostImpl::ShutDownInProcessRenderer();
 775 #endif
 776
 777   if (parts_) {
 778     TRACE_EVENT0("shutdown",
 779                  "BrowserMainLoop::Subsystem:PostMainMessageLoopRun");
 780     parts_->PostMainMessageLoopRun();
 781   }
 782
 783   trace_memory_controller_.reset();
 784   system_stats_monitor_.reset();
 785
 786 #if !defined(OS_IOS)
 787   // Destroying the GpuProcessHostUIShims on the UI thread posts a task to
 788   // delete related objects on the GPU thread. This must be done before
 789   // stopping the GPU thread. The GPU thread will close IPC channels to renderer
 790   // processes so this has to happen before stopping the IO thread.
 791   {
 792     TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:GPUProcessHostShim");
 793     GpuProcessHostUIShim::DestroyAll();
 794   }
 795   // Cancel pending requests and prevent new requests.
 796   if (resource_dispatcher_host_) {
 797     TRACE_EVENT0("shutdown",
 798                  "BrowserMainLoop::Subsystem:ResourceDispatcherHost");
 799     resource_dispatcher_host_.get()->Shutdown();
 800   }
 801
 802 #if defined(USE_AURA) || defined(OS_MACOSX)
 803   if (ShouldInitializeBrowserGpuChannelAndTransportSurface()) {
 804     TRACE_EVENT0("shutdown",
 805                  "BrowserMainLoop::Subsystem:ImageTransportFactory");
 806     ImageTransportFactory::Terminate();
 807   }
 808 #endif
 809
 810 #if defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
 811   ZygoteHostImpl::GetInstance()->TearDownAfterLastChild();
 812 #endif  // defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
 813
 814   // The device monitors are using |system_monitor_| as dependency, so delete
 815   // them before |system_monitor_| goes away.
 816   // On Mac and windows, the monitor needs to be destroyed on the same thread
 817   // as they were created. On Linux, the monitor will be deleted when IO thread
 818   // goes away.
 819 #if defined(OS_WIN)
 820   system_message_window_.reset();
 821 #elif defined(OS_MACOSX)
 822   device_monitor_mac_.reset();
 823 #endif
 824 #endif  // !defined(OS_IOS)
 825
 826   // Must be size_t so we can subtract from it.
 827   for (size_t thread_id = BrowserThread::ID_COUNT - 1;
 828        thread_id >= (BrowserThread::UI + 1);
 829        --thread_id) {
 830     // Find the thread object we want to stop. Looping over all valid
 831     // BrowserThread IDs and DCHECKing on a missing case in the switch
 832     // statement helps avoid a mismatch between this code and the
 833     // BrowserThread::ID enumeration.
 834     //
 835     // The destruction order is the reverse order of occurrence in the
 836     // BrowserThread::ID list. The rationale for the order is as
 837     // follows (need to be filled in a bit):
 838     //
 839     //
 840     // - The IO thread is the only user of the CACHE thread.
 841     //
 842     // - The PROCESS_LAUNCHER thread must be stopped after IO in case
 843     //   the IO thread posted a task to terminate a process on the
 844     //   process launcher thread.
 845     //
 846     // - (Not sure why DB stops last.)
 847     switch (thread_id) {
 848       case BrowserThread::DB: {
 849         TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:DBThread");
 850         ResetThread_DB(db_thread_.Pass());
 851         break;
 852       }
 853       case BrowserThread::FILE: {
 854         TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:FileThread");
 855 #if !defined(OS_IOS)
 856         // Clean up state that lives on or uses the file_thread_ before
 857         // it goes away.
 858         if (resource_dispatcher_host_)
 859           resource_dispatcher_host_.get()->save_file_manager()->Shutdown();
 860 #endif  // !defined(OS_IOS)
 861         ResetThread_FILE(file_thread_.Pass());
 862         break;
 863       }
 864       case BrowserThread::FILE_USER_BLOCKING: {
 865         TRACE_EVENT0("shutdown",
 866                       "BrowserMainLoop::Subsystem:FileUserBlockingThread");
 867         ResetThread_FILE_USER_BLOCKING(file_user_blocking_thread_.Pass());
 868         break;
 869       }
 870       case BrowserThread::PROCESS_LAUNCHER: {
 871         TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:LauncherThread");
 872         ResetThread_PROCESS_LAUNCHER(process_launcher_thread_.Pass());
 873         break;
 874       }
 875       case BrowserThread::CACHE: {
 876         TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:CacheThread");
 877         ResetThread_CACHE(cache_thread_.Pass());
 878         break;
 879       }
 880       case BrowserThread::IO: {
 881         TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:IOThread");
 882         ResetThread_IO(io_thread_.Pass());
 883         break;
 884       }
 885       case BrowserThread::UI:
 886       case BrowserThread::ID_COUNT:
 887       default:
 888         NOTREACHED();
 889         break;
 890     }
 891   }
 892
 893 #if !defined(OS_IOS)
 894   {
 895     TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:IndexedDBThread");
 896     ResetThread_IndexedDb(indexed_db_thread_.Pass());
 897   }
 898 #endif
 899
 900   // Close the blocking I/O pool after the other threads. Other threads such
 901   // as the I/O thread may need to schedule work like closing files or flushing
 902   // data during shutdown, so the blocking pool needs to be available. There
 903   // may also be slow operations pending that will blcok shutdown, so closing
 904   // it here (which will block until required operations are complete) gives
 905   // more head start for those operations to finish.
 906   {
 907     TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:ThreadPool");
 908     BrowserThreadImpl::ShutdownThreadPool();
 909   }
 910
 911 #if !defined(OS_IOS)
 912   // Must happen after the IO thread is shutdown since this may be accessed from
 913   // it.
 914   {
 915     TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:GPUChannelFactory");
 916     if (BrowserGpuChannelHostFactory::instance())
 917       BrowserGpuChannelHostFactory::Terminate();
 918   }
 919
 920   // Must happen after the I/O thread is shutdown since this class lives on the
 921   // I/O thread and isn't threadsafe.
 922   {
 923     TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:GamepadService");
 924     GamepadService::GetInstance()->Terminate();
 925   }
 926   {
 927     TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:SensorService");
 928     DeviceInertialSensorService::GetInstance()->Shutdown();
 929   }
 930   {
 931     TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:BatteryStatusService");
 932     BatteryStatusService::GetInstance()->Shutdown();
 933   }
 934   {
 935     TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:DeleteDataSources");
 936     URLDataManager::DeleteDataSources();
 937   }
 938 #endif  // !defined(OS_IOS)
 939
 940   if (parts_) {
 941     TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:PostDestroyThreads");
 942     parts_->PostDestroyThreads();
 943   }
 944 }
 945
 946 void BrowserMainLoop::StopStartupTracingTimer() {
 947   startup_trace_timer_.Stop();
 948 }
 949
 950 void BrowserMainLoop::InitializeMainThread() {
 951   TRACE_EVENT0("startup", "BrowserMainLoop::InitializeMainThread");
 952   const char* kThreadName = "CrBrowserMain";
 953   base::PlatformThread::SetName(kThreadName);
 954   if (main_message_loop_)
 955     main_message_loop_->set_thread_name(kThreadName);
 956
 957   // Register the main thread by instantiating it, but don't call any methods.
 958   main_thread_.reset(
 959       new BrowserThreadImpl(BrowserThread::UI, base::MessageLoop::current()));
 960 }
 961
 962 int BrowserMainLoop::BrowserThreadsStarted() {
 963   TRACE_EVENT0("startup", "BrowserMainLoop::BrowserThreadsStarted");
 964
 965 #if !defined(OS_IOS)
 966   indexed_db_thread_.reset(new base::Thread("IndexedDB"));
 967   indexed_db_thread_->Start();
 968 #endif
 969
 970 #if defined(OS_ANDROID)
 971   // Up the priority of anything that touches with display tasks
 972   // (this thread is UI thread, and io_thread_ is for IPCs).
 973   io_thread_->SetPriority(base::kThreadPriority_Display);
 974   base::PlatformThread::SetThreadPriority(
 975       base::PlatformThread::CurrentHandle(),
 976       base::kThreadPriority_Display);
 977 #endif
 978
 979 #if !defined(OS_IOS)
 980   HistogramSynchronizer::GetInstance();
 981
 982   bool initialize_gpu_data_manager = true;
 983 #if defined(OS_ANDROID)
 984   // On Android, GLSurface::InitializeOneOff() must be called before initalizing
 985   // the GpuDataManagerImpl as it uses the GL bindings. crbug.com/326295
 986   if (!gfx::GLSurface::InitializeOneOff()) {
 987     LOG(ERROR) << "GLSurface::InitializeOneOff failed";
 988     initialize_gpu_data_manager = false;
 989   }
 990 #endif
 991
 992   // Initialize the GpuDataManager before we set up the MessageLoops because
 993   // otherwise we'll trigger the assertion about doing IO on the UI thread.
 994   if (initialize_gpu_data_manager)
 995     GpuDataManagerImpl::GetInstance()->Initialize();
 996
 997   bool always_uses_gpu = true;
 998   bool established_gpu_channel = false;
 999 #if defined(USE_AURA) || defined(OS_MACOSX)
1000   if (ShouldInitializeBrowserGpuChannelAndTransportSurface()) {
1001     established_gpu_channel = true;
1002     if (!GpuDataManagerImpl::GetInstance()->CanUseGpuBrowserCompositor()) {
1003       established_gpu_channel = always_uses_gpu = false;
1004     }
1005     BrowserGpuChannelHostFactory::Initialize(established_gpu_channel);
1006     ImageTransportFactory::Initialize();
1007 #if defined(USE_AURA)
1008     if (aura::Env::GetInstance()) {
1009       aura::Env::GetInstance()->set_context_factory(GetContextFactory());
1010     }
1011 #endif
1012   }
1013 #elif defined(OS_ANDROID)
1014   established_gpu_channel = true;
1015   BrowserGpuChannelHostFactory::Initialize(established_gpu_channel);
1016 #endif
1017
1018 #if defined(OS_LINUX) && defined(USE_UDEV)
1019   device_monitor_linux_.reset(new DeviceMonitorLinux());
1020 #elif defined(OS_MACOSX)
1021   device_monitor_mac_.reset(new DeviceMonitorMac());
1022 #endif
1023
1024   // RDH needs the IO thread to be created
1025   {
1026     TRACE_EVENT0("startup",
1027       "BrowserMainLoop::BrowserThreadsStarted:InitResourceDispatcherHost");
1028     resource_dispatcher_host_.reset(new ResourceDispatcherHostImpl());
1029   }
1030
1031   // MediaStreamManager needs the IO thread to be created.
1032   {
1033     TRACE_EVENT0("startup",
1034       "BrowserMainLoop::BrowserThreadsStarted:InitMediaStreamManager");
1035     media_stream_manager_.reset(new MediaStreamManager(audio_manager_.get()));
1036   }
1037
1038   {
1039     TRACE_EVENT0("startup",
1040       "BrowserMainLoop::BrowserThreadsStarted:InitSpeechRecognition");
1041     speech_recognition_manager_.reset(new SpeechRecognitionManagerImpl(
1042         audio_manager_.get(), media_stream_manager_.get()));
1043   }
1044
1045   {
1046     TRACE_EVENT0(
1047         "startup",
1048         "BrowserMainLoop::BrowserThreadsStarted::InitUserInputMonitor");
1049     user_input_monitor_ = media::UserInputMonitor::Create(
1050         io_thread_->message_loop_proxy(), main_thread_->message_loop_proxy());
1051   }
1052
1053   {
1054     TRACE_EVENT0("startup",
1055                  "BrowserMainLoop::BrowserThreadsStarted::TimeZoneMonitor");
1056     time_zone_monitor_ = TimeZoneMonitor::Create();
1057   }
1058
1059   // Alert the clipboard class to which threads are allowed to access the
1060   // clipboard:
1061   std::vector<base::PlatformThreadId> allowed_clipboard_threads;
1062   // The current thread is the UI thread.
1063   allowed_clipboard_threads.push_back(base::PlatformThread::CurrentId());
1064 #if defined(OS_WIN)
1065   // On Windows, clipboards are also used on the File or IO threads.
1066   allowed_clipboard_threads.push_back(file_thread_->thread_id());
1067   allowed_clipboard_threads.push_back(io_thread_->thread_id());
1068 #endif
1069   ui::Clipboard::SetAllowedThreads(allowed_clipboard_threads);
1070
1071   // When running the GPU thread in-process, avoid optimistically starting it
1072   // since creating the GPU thread races against creation of the one-and-only
1073   // ChildProcess instance which is created by the renderer thread.
1074   if (GpuDataManagerImpl::GetInstance()->GpuAccessAllowed(NULL) &&
1075       !established_gpu_channel &&
1076       always_uses_gpu &&
1077       !parsed_command_line_.HasSwitch(switches::kSingleProcess) &&
1078       !parsed_command_line_.HasSwitch(switches::kInProcessGPU)) {
1079     TRACE_EVENT_INSTANT0("gpu", "Post task to launch GPU process",
1080                          TRACE_EVENT_SCOPE_THREAD);
1081     BrowserThread::PostTask(
1082         BrowserThread::IO, FROM_HERE, base::Bind(
1083             base::IgnoreResult(&GpuProcessHost::Get),
1084             GpuProcessHost::GPU_PROCESS_KIND_SANDBOXED,
1085             CAUSE_FOR_GPU_LAUNCH_BROWSER_STARTUP));
1086   }
1087
1088 #if defined(OS_MACOSX)
1089   ThemeHelperMac::GetInstance();
1090   SystemHotkeyHelperMac::GetInstance()->DeferredLoadSystemHotkeys();
1091   if (ShouldEnableBootstrapSandbox()) {
1092     TRACE_EVENT0("startup",
1093         "BrowserMainLoop::BrowserThreadsStarted:BootstrapSandbox");
1094     CHECK(GetBootstrapSandbox());
1095   }
1096 #endif  // defined(OS_MACOSX)
1097
1098 #endif  // !defined(OS_IOS)
1099
1100   return result_code_;
1101 }
1102
1103 bool BrowserMainLoop::InitializeToolkit() {
1104   TRACE_EVENT0("startup", "BrowserMainLoop::InitializeToolkit");
1105   // TODO(evan): this function is rather subtle, due to the variety
1106   // of intersecting ifdefs we have.  To keep it easy to follow, there
1107   // are no #else branches on any #ifs.
1108   // TODO(stevenjb): Move platform specific code into platform specific Parts
1109   // (Need to add InitializeToolkit stage to BrowserParts).
1110   // See also GTK setup in EarlyInitialization, above, and associated comments.
1111
1112 #if defined(OS_WIN)
1113   // Init common control sex.
1114   INITCOMMONCONTROLSEX config;
1115   config.dwSize = sizeof(config);
1116   config.dwICC = ICC_WIN95_CLASSES;
1117   if (!InitCommonControlsEx(&config))
1118     PLOG(FATAL);
1119 #endif
1120
1121 #if defined(USE_AURA)
1122
1123 #if defined(USE_X11)
1124   if (!gfx::GetXDisplay())
1125     return false;
1126 #endif
1127
1128   // Env creates the compositor. Aura widgets need the compositor to be created
1129   // before they can be initialized by the browser.
1130   aura::Env::CreateInstance(true);
1131 #endif  // defined(USE_AURA)
1132
1133   if (parts_)
1134     parts_->ToolkitInitialized();
1135
1136   return true;
1137 }
1138
1139 void BrowserMainLoop::MainMessageLoopRun() {
1140 #if defined(OS_ANDROID)
1141   // Android's main message loop is the Java message loop.
1142   NOTREACHED();
1143 #else
1144   DCHECK(base::MessageLoopForUI::IsCurrent());
1145   if (parameters_.ui_task)
1146     base::MessageLoopForUI::current()->PostTask(FROM_HERE,
1147                                                 *parameters_.ui_task);
1148
1149   base::RunLoop run_loop;
1150   run_loop.Run();
1151 #endif
1152 }
1153
1154 base::FilePath BrowserMainLoop::GetStartupTraceFileName(
1155     const base::CommandLine& command_line) const {
1156   base::FilePath trace_file = command_line.GetSwitchValuePath(
1157       switches::kTraceStartupFile);
1158   // trace_file = "none" means that startup events will show up for the next
1159   // begin/end tracing (via about:tracing or AutomationProxy::BeginTracing/
1160   // EndTracing, for example).
1161   if (trace_file == base::FilePath().AppendASCII("none"))
1162     return trace_file;
1163
1164   if (trace_file.empty()) {
1165 #if defined(OS_ANDROID)
1166     TracingControllerAndroid::GenerateTracingFilePath(&trace_file);
1167 #else
1168     // Default to saving the startup trace into the current dir.
1169     trace_file = base::FilePath().AppendASCII("chrometrace.log");
1170 #endif
1171   }
1172
1173   return trace_file;
1174 }
1175
1176 void BrowserMainLoop::InitStartupTracing(
1177     const base::CommandLine& command_line) {
1178   DCHECK(is_tracing_startup_);
1179
1180   startup_trace_file_ = GetStartupTraceFileName(parsed_command_line_);
1181
1182   std::string delay_str = command_line.GetSwitchValueASCII(
1183       switches::kTraceStartupDuration);
1184   int delay_secs = 5;
1185   if (!delay_str.empty() && !base::StringToInt(delay_str, &delay_secs)) {
1186     DLOG(WARNING) << "Could not parse --" << switches::kTraceStartupDuration
1187         << "=" << delay_str << " defaulting to 5 (secs)";
1188     delay_secs = 5;
1189   }
1190
1191   startup_trace_timer_.Start(FROM_HERE,
1192                              base::TimeDelta::FromSeconds(delay_secs),
1193                              this,
1194                              &BrowserMainLoop::EndStartupTracing);
1195 }
1196
1197 void BrowserMainLoop::EndStartupTracing() {
1198   is_tracing_startup_ = false;
1199   TracingController::GetInstance()->DisableRecording(
1200       startup_trace_file_, base::Bind(&OnStoppedStartupTracing));
1201 }
1202
1203 }  // namespace content