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/logging.h"
  11 #include "base/message_loop/message_loop.h"
  12 #include "base/metrics/field_trial.h"
  13 #include "base/metrics/histogram.h"
  14 #include "base/pending_task.h"
  15 #include "base/power_monitor/power_monitor.h"
  16 #include "base/power_monitor/power_monitor_device_source.h"
  17 #include "base/process/process_metrics.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 "content/browser/browser_thread_impl.h"
  25 #include "content/browser/device_sensors/device_inertial_sensor_service.h"
  26 #include "content/browser/download/save_file_manager.h"
  27 #include "content/browser/gamepad/gamepad_service.h"
  28 #include "content/browser/gpu/browser_gpu_channel_host_factory.h"
  29 #include "content/browser/gpu/compositor_util.h"
  30 #include "content/browser/gpu/gpu_data_manager_impl.h"
  31 #include "content/browser/gpu/gpu_process_host.h"
  32 #include "content/browser/gpu/gpu_process_host_ui_shim.h"
  33 #include "content/browser/histogram_synchronizer.h"
  34 #include "content/browser/loader/resource_dispatcher_host_impl.h"
  35 #include "content/browser/media/media_internals.h"
  36 #include "content/browser/net/browser_online_state_observer.h"
  37 #include "content/browser/renderer_host/media/media_stream_manager.h"
  38 #include "content/browser/speech/speech_recognition_manager_impl.h"
  39 #include "content/browser/startup_task_runner.h"
  40 #include "content/browser/time_zone_monitor.h"
  41 #include "content/browser/webui/content_web_ui_controller_factory.h"
  42 #include "content/browser/webui/url_data_manager.h"
  43 #include "content/public/browser/browser_main_parts.h"
  44 #include "content/public/browser/browser_shutdown.h"
  45 #include "content/public/browser/content_browser_client.h"
  46 #include "content/public/browser/render_process_host.h"
  47 #include "content/public/browser/tracing_controller.h"
  48 #include "content/public/common/content_switches.h"
  49 #include "content/public/common/main_function_params.h"
  50 #include "content/public/common/result_codes.h"
  51 #include "crypto/nss_util.h"
  52 #include "device/battery/battery_status_service.h"
  53 #include "media/audio/audio_manager.h"
  54 #include "media/base/media.h"
  55 #include "media/base/user_input_monitor.h"
  56 #include "media/midi/midi_manager.h"
  57 #include "net/base/network_change_notifier.h"
  58 #include "net/socket/client_socket_factory.h"
  59 #include "net/ssl/ssl_config_service.h"
  60 #include "ui/base/clipboard/clipboard.h"
  61
  62 #if defined(USE_AURA) || (defined(OS_MACOSX) && !defined(OS_IOS))
  63 #include "content/browser/compositor/image_transport_factory.h"
  64 #endif
  65
  66 #if defined(USE_AURA)
  67 #include "content/public/browser/context_factory.h"
  68 #include "ui/aura/env.h"
  69 #endif
  70
  71 #if !defined(OS_IOS)
  72 #include "content/browser/renderer_host/render_process_host_impl.h"
  73 #endif
  74
  75 #if defined(OS_ANDROID)
  76 #include "base/android/jni_android.h"
  77 #include "content/browser/android/browser_startup_controller.h"
  78 #include "content/browser/android/browser_surface_texture_manager.h"
  79 #include "content/browser/android/tracing_controller_android.h"
  80 #include "content/browser/screen_orientation/screen_orientation_delegate_android.h"
  81 #include "content/public/browser/screen_orientation_provider.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 // Disable optimizations for this block of functions so the compiler doesn't
 235 // merge them all together. This makes it possible to tell what thread was
 236 // unresponsive by inspecting the callstack.
 237 MSVC_DISABLE_OPTIMIZE()
 238 MSVC_PUSH_DISABLE_WARNING(4748)
 239
 240 NOINLINE void ResetThread_DB(scoped_ptr<BrowserProcessSubThread> thread) {
 241   thread.reset();
 242 }
 243
 244 NOINLINE void ResetThread_FILE(scoped_ptr<BrowserProcessSubThread> thread) {
 245   thread.reset();
 246 }
 247
 248 NOINLINE void ResetThread_FILE_USER_BLOCKING(
 249     scoped_ptr<BrowserProcessSubThread> thread) {
 250   thread.reset();
 251 }
 252
 253 NOINLINE void ResetThread_PROCESS_LAUNCHER(
 254     scoped_ptr<BrowserProcessSubThread> thread) {
 255   thread.reset();
 256 }
 257
 258 NOINLINE void ResetThread_CACHE(scoped_ptr<BrowserProcessSubThread> thread) {
 259   thread.reset();
 260 }
 261
 262 NOINLINE void ResetThread_IO(scoped_ptr<BrowserProcessSubThread> thread) {
 263   thread.reset();
 264 }
 265
 266 #if !defined(OS_IOS)
 267 NOINLINE void ResetThread_IndexedDb(scoped_ptr<base::Thread> thread) {
 268   thread.reset();
 269 }
 270 #endif
 271
 272 MSVC_POP_WARNING()
 273 MSVC_ENABLE_OPTIMIZE();
 274
 275 }  // namespace
 276
 277 // The currently-running BrowserMainLoop.  There can be one or zero.
 278 BrowserMainLoop* g_current_browser_main_loop = NULL;
 279
 280 // This is just to be able to keep ShutdownThreadsAndCleanUp out of
 281 // the public interface of BrowserMainLoop.
 282 class BrowserShutdownImpl {
 283  public:
 284   static void ImmediateShutdownAndExitProcess() {
 285     DCHECK(g_current_browser_main_loop);
 286     g_current_browser_main_loop->ShutdownThreadsAndCleanUp();
 287
 288 #if defined(OS_WIN)
 289     // At this point the message loop is still running yet we've shut everything
 290     // down. If any messages are processed we'll likely crash. Exit now.
 291     ExitProcess(RESULT_CODE_NORMAL_EXIT);
 292 #elif defined(OS_POSIX) && !defined(OS_MACOSX)
 293     _exit(RESULT_CODE_NORMAL_EXIT);
 294 #else
 295     NOTIMPLEMENTED();
 296 #endif
 297   }
 298 };
 299
 300 void ImmediateShutdownAndExitProcess() {
 301   BrowserShutdownImpl::ImmediateShutdownAndExitProcess();
 302 }
 303
 304 // For measuring memory usage after each task. Behind a command line flag.
 305 class BrowserMainLoop::MemoryObserver : public base::MessageLoop::TaskObserver {
 306  public:
 307   MemoryObserver() {}
 308   ~MemoryObserver() override {}
 309
 310   void WillProcessTask(const base::PendingTask& pending_task) override {}
 311
 312   void DidProcessTask(const base::PendingTask& pending_task) override {
 313 #if !defined(OS_IOS)  // No ProcessMetrics on IOS.
 314     scoped_ptr<base::ProcessMetrics> process_metrics(
 315         base::ProcessMetrics::CreateProcessMetrics(
 316 #if defined(OS_MACOSX)
 317             base::GetCurrentProcessHandle(), NULL));
 318 #else
 319             base::GetCurrentProcessHandle()));
 320 #endif
 321     size_t private_bytes;
 322     process_metrics->GetMemoryBytes(&private_bytes, NULL);
 323     LOCAL_HISTOGRAM_MEMORY_KB("Memory.BrowserUsed", private_bytes >> 10);
 324 #endif
 325   }
 326  private:
 327   DISALLOW_COPY_AND_ASSIGN(MemoryObserver);
 328 };
 329
 330
 331 // BrowserMainLoop construction / destruction =============================
 332
 333 BrowserMainLoop* BrowserMainLoop::GetInstance() {
 334   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 335   return g_current_browser_main_loop;
 336 }
 337
 338 BrowserMainLoop::BrowserMainLoop(const MainFunctionParams& parameters)
 339     : parameters_(parameters),
 340       parsed_command_line_(parameters.command_line),
 341       result_code_(RESULT_CODE_NORMAL_EXIT),
 342       created_threads_(false),
 343       // ContentMainRunner should have enabled tracing of the browser process
 344       // when kTraceStartup is in the command line.
 345       is_tracing_startup_(
 346           parameters.command_line.HasSwitch(switches::kTraceStartup)) {
 347   DCHECK(!g_current_browser_main_loop);
 348   g_current_browser_main_loop = this;
 349 }
 350
 351 BrowserMainLoop::~BrowserMainLoop() {
 352   DCHECK_EQ(this, g_current_browser_main_loop);
 353 #if !defined(OS_IOS)
 354   ui::Clipboard::DestroyClipboardForCurrentThread();
 355 #endif  // !defined(OS_IOS)
 356   g_current_browser_main_loop = NULL;
 357 }
 358
 359 void BrowserMainLoop::Init() {
 360   TRACE_EVENT0("startup", "BrowserMainLoop::Init");
 361   parts_.reset(
 362       GetContentClient()->browser()->CreateBrowserMainParts(parameters_));
 363 }
 364
 365 // BrowserMainLoop stages ==================================================
 366
 367 void BrowserMainLoop::EarlyInitialization() {
 368   TRACE_EVENT0("startup", "BrowserMainLoop::EarlyInitialization");
 369
 370 #if defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
 371   // No thread should be created before this call, as SetupSandbox()
 372   // will end-up using fork().
 373   SetupSandbox(parsed_command_line_);
 374 #endif
 375
 376 #if defined(USE_X11)
 377   if (parsed_command_line_.HasSwitch(switches::kSingleProcess) ||
 378       parsed_command_line_.HasSwitch(switches::kInProcessGPU)) {
 379     if (!gfx::InitializeThreadedX11()) {
 380       LOG(ERROR) << "Failed to put Xlib into threaded mode.";
 381     }
 382   }
 383 #endif
 384
 385   // GLib's spawning of new processes is buggy, so it's important that at this
 386   // point GLib does not need to start DBUS. Chrome should always start with
 387   // DBUS_SESSION_BUS_ADDRESS properly set. See crbug.com/309093.
 388 #if defined(USE_GLIB)
 389   // g_type_init will be deprecated in 2.36. 2.35 is the development
 390   // version for 2.36, hence do not call g_type_init starting 2.35.
 391   // http://developer.gnome.org/gobject/unstable/gobject-Type-Information.html#g-type-init
 392 #if !GLIB_CHECK_VERSION(2, 35, 0)
 393   // GLib type system initialization. Needed at least for gconf,
 394   // used in net/proxy/proxy_config_service_linux.cc. Most likely
 395   // this is superfluous as gtk_init() ought to do this. It's
 396   // definitely harmless, so retained as a reminder of this
 397   // requirement for gconf.
 398   g_type_init();
 399 #endif
 400
 401   SetUpGLibLogHandler();
 402 #endif
 403
 404   if (parts_)
 405     parts_->PreEarlyInitialization();
 406
 407 #if defined(OS_MACOSX)
 408   // We use quite a few file descriptors for our IPC, and the default limit on
 409   // the Mac is low (256), so bump it up.
 410   base::SetFdLimit(1024);
 411 #endif
 412
 413 #if defined(OS_WIN)
 414   net::EnsureWinsockInit();
 415 #endif
 416
 417 #if !defined(USE_OPENSSL)
 418   // We want to be sure to init NSPR on the main thread.
 419   crypto::EnsureNSPRInit();
 420 #endif  // !defined(USE_OPENSSL)
 421
 422 #if !defined(OS_IOS)
 423   if (parsed_command_line_.HasSwitch(switches::kRendererProcessLimit)) {
 424     std::string limit_string = parsed_command_line_.GetSwitchValueASCII(
 425         switches::kRendererProcessLimit);
 426     size_t process_limit;
 427     if (base::StringToSizeT(limit_string, &process_limit)) {
 428       RenderProcessHost::SetMaxRendererProcessCount(process_limit);
 429     }
 430   }
 431 #endif  // !defined(OS_IOS)
 432
 433   if (parts_)
 434     parts_->PostEarlyInitialization();
 435 }
 436
 437 void BrowserMainLoop::MainMessageLoopStart() {
 438   TRACE_EVENT0("startup", "BrowserMainLoop::MainMessageLoopStart");
 439   if (parts_) {
 440     TRACE_EVENT0("startup",
 441         "BrowserMainLoop::MainMessageLoopStart:PreMainMessageLoopStart");
 442     parts_->PreMainMessageLoopStart();
 443   }
 444
 445 #if defined(OS_WIN)
 446   // If we're running tests (ui_task is non-null), then the ResourceBundle
 447   // has already been initialized.
 448   if (!parameters_.ui_task) {
 449     // Override the configured locale with the user's preferred UI language.
 450     l10n_util::OverrideLocaleWithUILanguageList();
 451   }
 452 #endif
 453
 454   // Create a MessageLoop if one does not already exist for the current thread.
 455   if (!base::MessageLoop::current())
 456     main_message_loop_.reset(new base::MessageLoopForUI);
 457
 458   InitializeMainThread();
 459
 460   {
 461     TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:SystemMonitor");
 462     system_monitor_.reset(new base::SystemMonitor);
 463   }
 464   {
 465     TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:PowerMonitor");
 466     scoped_ptr<base::PowerMonitorSource> power_monitor_source(
 467       new base::PowerMonitorDeviceSource());
 468     power_monitor_.reset(new base::PowerMonitor(power_monitor_source.Pass()));
 469   }
 470   {
 471     TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:HighResTimerManager");
 472     hi_res_timer_manager_.reset(new base::HighResolutionTimerManager);
 473   }
 474   {
 475     TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:NetworkChangeNotifier");
 476     network_change_notifier_.reset(net::NetworkChangeNotifier::Create());
 477   }
 478
 479 #if !defined(OS_IOS)
 480   {
 481     TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:MediaFeatures");
 482     media::InitializeCPUSpecificMediaFeatures();
 483   }
 484   {
 485     TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:AudioMan");
 486     audio_manager_.reset(media::AudioManager::Create(
 487         MediaInternals::GetInstance()));
 488   }
 489   {
 490     TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:MidiManager");
 491     midi_manager_.reset(media::MidiManager::Create());
 492   }
 493   {
 494     TRACE_EVENT0("startup",
 495                  "BrowserMainLoop::Subsystem:ContentWebUIController");
 496     WebUIControllerFactory::RegisterFactory(
 497         ContentWebUIControllerFactory::GetInstance());
 498   }
 499
 500   {
 501     TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:OnlineStateObserver");
 502     online_state_observer_.reset(new BrowserOnlineStateObserver);
 503   }
 504
 505   {
 506     system_stats_monitor_.reset(new base::debug::TraceEventSystemStatsMonitor(
 507         base::ThreadTaskRunnerHandle::Get()));
 508   }
 509 #endif  // !defined(OS_IOS)
 510
 511 #if defined(OS_WIN)
 512   system_message_window_.reset(new SystemMessageWindowWin);
 513 #endif
 514
 515   if (parts_)
 516     parts_->PostMainMessageLoopStart();
 517
 518 #if !defined(OS_IOS)
 519   // Start tracing to a file if needed. Only do this after starting the main
 520   // message loop to avoid calling MessagePumpForUI::ScheduleWork() before
 521   // MessagePumpForUI::Start() as it will crash the browser.
 522   if (is_tracing_startup_) {
 523     TRACE_EVENT0("startup", "BrowserMainLoop::InitStartupTracing");
 524     InitStartupTracing(parsed_command_line_);
 525   }
 526 #endif  // !defined(OS_IOS)
 527
 528 #if defined(OS_ANDROID)
 529   {
 530     TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:SurfaceTextureManager");
 531     SurfaceTextureManager::InitInstance(new BrowserSurfaceTextureManager);
 532   }
 533
 534   {
 535     TRACE_EVENT0("startup",
 536                  "BrowserMainLoop::Subsystem:ScreenOrientationProvider");
 537     screen_orientation_delegate_.reset(
 538         new ScreenOrientationDelegateAndroid());
 539     ScreenOrientationProvider::SetDelegate(screen_orientation_delegate_.get());
 540   }
 541 #endif
 542
 543   if (parsed_command_line_.HasSwitch(switches::kMemoryMetrics)) {
 544     TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:MemoryObserver");
 545     memory_observer_.reset(new MemoryObserver());
 546     base::MessageLoop::current()->AddTaskObserver(memory_observer_.get());
 547   }
 548
 549 #if defined(TCMALLOC_TRACE_MEMORY_SUPPORTED)
 550   trace_memory_controller_.reset(new base::debug::TraceMemoryController(
 551       base::MessageLoop::current()->message_loop_proxy(),
 552       ::HeapProfilerWithPseudoStackStart,
 553       ::HeapProfilerStop,
 554       ::GetHeapProfile));
 555 #endif
 556 }
 557
 558 int BrowserMainLoop::PreCreateThreads() {
 559   if (parts_) {
 560     TRACE_EVENT0("startup",
 561         "BrowserMainLoop::CreateThreads:PreCreateThreads");
 562     result_code_ = parts_->PreCreateThreads();
 563   }
 564
 565 #if defined(ENABLE_PLUGINS)
 566   // Prior to any processing happening on the io thread, we create the
 567   // plugin service as it is predominantly used from the io thread,
 568   // but must be created on the main thread. The service ctor is
 569   // inexpensive and does not invoke the io_thread() accessor.
 570   {
 571     TRACE_EVENT0("startup", "BrowserMainLoop::CreateThreads:PluginService");
 572     PluginService::GetInstance()->Init();
 573   }
 574 #endif
 575
 576 #if !defined(OS_IOS) && (!defined(GOOGLE_CHROME_BUILD) || defined(OS_ANDROID))
 577   // Single-process is an unsupported and not fully tested mode, so
 578   // don't enable it for official Chrome builds (except on Android).
 579   if (parsed_command_line_.HasSwitch(switches::kSingleProcess))
 580     RenderProcessHost::SetRunRendererInProcess(true);
 581 #endif
 582   return result_code_;
 583 }
 584
 585 void BrowserMainLoop::CreateStartupTasks() {
 586   TRACE_EVENT0("startup", "BrowserMainLoop::CreateStartupTasks");
 587
 588   // First time through, we really want to create all the tasks
 589   if (!startup_task_runner_.get()) {
 590 #if defined(OS_ANDROID)
 591     startup_task_runner_ = make_scoped_ptr(new StartupTaskRunner(
 592         base::Bind(&BrowserStartupComplete),
 593         base::MessageLoop::current()->message_loop_proxy()));
 594 #else
 595     startup_task_runner_ = make_scoped_ptr(new StartupTaskRunner(
 596         base::Callback<void(int)>(),
 597         base::MessageLoop::current()->message_loop_proxy()));
 598 #endif
 599     StartupTask pre_create_threads =
 600         base::Bind(&BrowserMainLoop::PreCreateThreads, base::Unretained(this));
 601     startup_task_runner_->AddTask(pre_create_threads);
 602
 603     StartupTask create_threads =
 604         base::Bind(&BrowserMainLoop::CreateThreads, base::Unretained(this));
 605     startup_task_runner_->AddTask(create_threads);
 606
 607     StartupTask browser_thread_started = base::Bind(
 608         &BrowserMainLoop::BrowserThreadsStarted, base::Unretained(this));
 609     startup_task_runner_->AddTask(browser_thread_started);
 610
 611     StartupTask pre_main_message_loop_run = base::Bind(
 612         &BrowserMainLoop::PreMainMessageLoopRun, base::Unretained(this));
 613     startup_task_runner_->AddTask(pre_main_message_loop_run);
 614
 615 #if defined(OS_ANDROID)
 616     if (BrowserMayStartAsynchronously()) {
 617       startup_task_runner_->StartRunningTasksAsync();
 618     }
 619 #endif
 620   }
 621 #if defined(OS_ANDROID)
 622   if (!BrowserMayStartAsynchronously()) {
 623     // A second request for asynchronous startup can be ignored, so
 624     // StartupRunningTasksAsync is only called first time through. If, however,
 625     // this is a request for synchronous startup then it must override any
 626     // previous call for async startup, so we call RunAllTasksNow()
 627     // unconditionally.
 628     startup_task_runner_->RunAllTasksNow();
 629   }
 630 #else
 631   startup_task_runner_->RunAllTasksNow();
 632 #endif
 633 }
 634
 635 int BrowserMainLoop::CreateThreads() {
 636   TRACE_EVENT0("startup", "BrowserMainLoop::CreateThreads");
 637
 638   base::Thread::Options io_message_loop_options;
 639   io_message_loop_options.message_loop_type = base::MessageLoop::TYPE_IO;
 640   base::Thread::Options ui_message_loop_options;
 641   ui_message_loop_options.message_loop_type = base::MessageLoop::TYPE_UI;
 642
 643   // Start threads in the order they occur in the BrowserThread::ID
 644   // enumeration, except for BrowserThread::UI which is the main
 645   // thread.
 646   //
 647   // Must be size_t so we can increment it.
 648   for (size_t thread_id = BrowserThread::UI + 1;
 649        thread_id < BrowserThread::ID_COUNT;
 650        ++thread_id) {
 651     scoped_ptr<BrowserProcessSubThread>* thread_to_start = NULL;
 652     base::Thread::Options options;
 653
 654     switch (thread_id) {
 655       case BrowserThread::DB:
 656         TRACE_EVENT_BEGIN1("startup",
 657             "BrowserMainLoop::CreateThreads:start",
 658             "Thread", "BrowserThread::DB");
 659         thread_to_start = &db_thread_;
 660         options.timer_slack = base::TIMER_SLACK_MAXIMUM;
 661         break;
 662       case BrowserThread::FILE_USER_BLOCKING:
 663         TRACE_EVENT_BEGIN1("startup",
 664             "BrowserMainLoop::CreateThreads:start",
 665             "Thread", "BrowserThread::FILE_USER_BLOCKING");
 666         thread_to_start = &file_user_blocking_thread_;
 667         break;
 668       case BrowserThread::FILE:
 669         TRACE_EVENT_BEGIN1("startup",
 670             "BrowserMainLoop::CreateThreads:start",
 671             "Thread", "BrowserThread::FILE");
 672         thread_to_start = &file_thread_;
 673 #if defined(OS_WIN)
 674         // On Windows, the FILE thread needs to be have a UI message loop
 675         // which pumps messages in such a way that Google Update can
 676         // communicate back to us.
 677         options = ui_message_loop_options;
 678 #else
 679         options = io_message_loop_options;
 680 #endif
 681         options.timer_slack = base::TIMER_SLACK_MAXIMUM;
 682         break;
 683       case BrowserThread::PROCESS_LAUNCHER:
 684         TRACE_EVENT_BEGIN1("startup",
 685             "BrowserMainLoop::CreateThreads:start",
 686             "Thread", "BrowserThread::PROCESS_LAUNCHER");
 687         thread_to_start = &process_launcher_thread_;
 688         options.timer_slack = base::TIMER_SLACK_MAXIMUM;
 689         break;
 690       case BrowserThread::CACHE:
 691         TRACE_EVENT_BEGIN1("startup",
 692             "BrowserMainLoop::CreateThreads:start",
 693             "Thread", "BrowserThread::CACHE");
 694         thread_to_start = &cache_thread_;
 695         options = io_message_loop_options;
 696         options.timer_slack = base::TIMER_SLACK_MAXIMUM;
 697         break;
 698       case BrowserThread::IO:
 699         TRACE_EVENT_BEGIN1("startup",
 700             "BrowserMainLoop::CreateThreads:start",
 701             "Thread", "BrowserThread::IO");
 702         thread_to_start = &io_thread_;
 703         options = io_message_loop_options;
 704         break;
 705       case BrowserThread::UI:
 706       case BrowserThread::ID_COUNT:
 707       default:
 708         NOTREACHED();
 709         break;
 710     }
 711
 712     BrowserThread::ID id = static_cast<BrowserThread::ID>(thread_id);
 713
 714     if (thread_to_start) {
 715       (*thread_to_start).reset(new BrowserProcessSubThread(id));
 716       if (!(*thread_to_start)->StartWithOptions(options)) {
 717         LOG(FATAL) << "Failed to start the browser thread: id == " << id;
 718       }
 719     } else {
 720       NOTREACHED();
 721     }
 722
 723     TRACE_EVENT_END0("startup", "BrowserMainLoop::CreateThreads:start");
 724   }
 725   created_threads_ = true;
 726   return result_code_;
 727 }
 728
 729 int BrowserMainLoop::PreMainMessageLoopRun() {
 730   if (parts_) {
 731     TRACE_EVENT0("startup",
 732         "BrowserMainLoop::CreateThreads:PreMainMessageLoopRun");
 733     parts_->PreMainMessageLoopRun();
 734   }
 735
 736   // If the UI thread blocks, the whole UI is unresponsive.
 737   // Do not allow disk IO from the UI thread.
 738   base::ThreadRestrictions::SetIOAllowed(false);
 739   base::ThreadRestrictions::DisallowWaiting();
 740   return result_code_;
 741 }
 742
 743 void BrowserMainLoop::RunMainMessageLoopParts() {
 744   TRACE_EVENT_BEGIN_ETW("BrowserMain:MESSAGE_LOOP", 0, "");
 745
 746   bool ran_main_loop = false;
 747   if (parts_)
 748     ran_main_loop = parts_->MainMessageLoopRun(&result_code_);
 749
 750   if (!ran_main_loop)
 751     MainMessageLoopRun();
 752
 753   TRACE_EVENT_END_ETW("BrowserMain:MESSAGE_LOOP", 0, "");
 754 }
 755
 756 void BrowserMainLoop::ShutdownThreadsAndCleanUp() {
 757   if (!created_threads_) {
 758     // Called early, nothing to do
 759     return;
 760   }
 761   TRACE_EVENT0("shutdown", "BrowserMainLoop::ShutdownThreadsAndCleanUp");
 762
 763   // Teardown may start in PostMainMessageLoopRun, and during teardown we
 764   // need to be able to perform IO.
 765   base::ThreadRestrictions::SetIOAllowed(true);
 766   BrowserThread::PostTask(
 767       BrowserThread::IO, FROM_HERE,
 768       base::Bind(base::IgnoreResult(&base::ThreadRestrictions::SetIOAllowed),
 769                  true));
 770
 771 #if !defined(OS_IOS)
 772   if (RenderProcessHost::run_renderer_in_process())
 773     RenderProcessHostImpl::ShutDownInProcessRenderer();
 774 #endif
 775
 776   if (parts_) {
 777     TRACE_EVENT0("shutdown",
 778                  "BrowserMainLoop::Subsystem:PostMainMessageLoopRun");
 779     parts_->PostMainMessageLoopRun();
 780   }
 781
 782   trace_memory_controller_.reset();
 783   system_stats_monitor_.reset();
 784
 785 #if !defined(OS_IOS)
 786   // Destroying the GpuProcessHostUIShims on the UI thread posts a task to
 787   // delete related objects on the GPU thread. This must be done before
 788   // stopping the GPU thread. The GPU thread will close IPC channels to renderer
 789   // processes so this has to happen before stopping the IO thread.
 790   {
 791     TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:GPUProcessHostShim");
 792     GpuProcessHostUIShim::DestroyAll();
 793   }
 794   // Cancel pending requests and prevent new requests.
 795   if (resource_dispatcher_host_) {
 796     TRACE_EVENT0("shutdown",
 797                  "BrowserMainLoop::Subsystem:ResourceDispatcherHost");
 798     resource_dispatcher_host_.get()->Shutdown();
 799   }
 800
 801 #if defined(USE_AURA) || defined(OS_MACOSX)
 802   {
 803     TRACE_EVENT0("shutdown",
 804                  "BrowserMainLoop::Subsystem:ImageTransportFactory");
 805     ImageTransportFactory::Terminate();
 806   }
 807 #endif
 808
 809 #if defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
 810   ZygoteHostImpl::GetInstance()->TearDownAfterLastChild();
 811 #endif  // defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
 812
 813   // The device monitors are using |system_monitor_| as dependency, so delete
 814   // them before |system_monitor_| goes away.
 815   // On Mac and windows, the monitor needs to be destroyed on the same thread
 816   // as they were created. On Linux, the monitor will be deleted when IO thread
 817   // goes away.
 818 #if defined(OS_WIN)
 819   system_message_window_.reset();
 820 #elif defined(OS_MACOSX)
 821   device_monitor_mac_.reset();
 822 #endif
 823 #endif  // !defined(OS_IOS)
 824
 825   // Must be size_t so we can subtract from it.
 826   for (size_t thread_id = BrowserThread::ID_COUNT - 1;
 827        thread_id >= (BrowserThread::UI + 1);
 828        --thread_id) {
 829     // Find the thread object we want to stop. Looping over all valid
 830     // BrowserThread IDs and DCHECKing on a missing case in the switch
 831     // statement helps avoid a mismatch between this code and the
 832     // BrowserThread::ID enumeration.
 833     //
 834     // The destruction order is the reverse order of occurrence in the
 835     // BrowserThread::ID list. The rationale for the order is as
 836     // follows (need to be filled in a bit):
 837     //
 838     //
 839     // - The IO thread is the only user of the CACHE thread.
 840     //
 841     // - The PROCESS_LAUNCHER thread must be stopped after IO in case
 842     //   the IO thread posted a task to terminate a process on the
 843     //   process launcher thread.
 844     //
 845     // - (Not sure why DB stops last.)
 846     switch (thread_id) {
 847       case BrowserThread::DB: {
 848         TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:DBThread");
 849         ResetThread_DB(db_thread_.Pass());
 850         break;
 851       }
 852       case BrowserThread::FILE: {
 853         TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:FileThread");
 854 #if !defined(OS_IOS)
 855         // Clean up state that lives on or uses the file_thread_ before
 856         // it goes away.
 857         if (resource_dispatcher_host_)
 858           resource_dispatcher_host_.get()->save_file_manager()->Shutdown();
 859 #endif  // !defined(OS_IOS)
 860         ResetThread_FILE(file_thread_.Pass());
 861         break;
 862       }
 863       case BrowserThread::FILE_USER_BLOCKING: {
 864         TRACE_EVENT0("shutdown",
 865                       "BrowserMainLoop::Subsystem:FileUserBlockingThread");
 866         ResetThread_FILE_USER_BLOCKING(file_user_blocking_thread_.Pass());
 867         break;
 868       }
 869       case BrowserThread::PROCESS_LAUNCHER: {
 870         TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:LauncherThread");
 871         ResetThread_PROCESS_LAUNCHER(process_launcher_thread_.Pass());
 872         break;
 873       }
 874       case BrowserThread::CACHE: {
 875         TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:CacheThread");
 876         ResetThread_CACHE(cache_thread_.Pass());
 877         break;
 878       }
 879       case BrowserThread::IO: {
 880         TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:IOThread");
 881         ResetThread_IO(io_thread_.Pass());
 882         break;
 883       }
 884       case BrowserThread::UI:
 885       case BrowserThread::ID_COUNT:
 886       default:
 887         NOTREACHED();
 888         break;
 889     }
 890   }
 891
 892 #if !defined(OS_IOS)
 893   {
 894     TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:IndexedDBThread");
 895     ResetThread_IndexedDb(indexed_db_thread_.Pass());
 896   }
 897 #endif
 898
 899   // Close the blocking I/O pool after the other threads. Other threads such
 900   // as the I/O thread may need to schedule work like closing files or flushing
 901   // data during shutdown, so the blocking pool needs to be available. There
 902   // may also be slow operations pending that will blcok shutdown, so closing
 903   // it here (which will block until required operations are complete) gives
 904   // more head start for those operations to finish.
 905   {
 906     TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:ThreadPool");
 907     BrowserThreadImpl::ShutdownThreadPool();
 908   }
 909
 910 #if !defined(OS_IOS)
 911   // Must happen after the IO thread is shutdown since this may be accessed from
 912   // it.
 913   {
 914     TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:GPUChannelFactory");
 915     if (BrowserGpuChannelHostFactory::instance())
 916       BrowserGpuChannelHostFactory::Terminate();
 917   }
 918
 919   // Must happen after the I/O thread is shutdown since this class lives on the
 920   // I/O thread and isn't threadsafe.
 921   {
 922     TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:GamepadService");
 923     GamepadService::GetInstance()->Terminate();
 924   }
 925   {
 926     TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:SensorService");
 927     DeviceInertialSensorService::GetInstance()->Shutdown();
 928   }
 929   {
 930     TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:BatteryStatusService");
 931     device::BatteryStatusService::GetInstance()->Shutdown();
 932   }
 933   {
 934     TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:DeleteDataSources");
 935     URLDataManager::DeleteDataSources();
 936   }
 937 #endif  // !defined(OS_IOS)
 938
 939   if (parts_) {
 940     TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:PostDestroyThreads");
 941     parts_->PostDestroyThreads();
 942   }
 943 }
 944
 945 void BrowserMainLoop::StopStartupTracingTimer() {
 946   startup_trace_timer_.Stop();
 947 }
 948
 949 void BrowserMainLoop::InitializeMainThread() {
 950   TRACE_EVENT0("startup", "BrowserMainLoop::InitializeMainThread");
 951   const char* kThreadName = "CrBrowserMain";
 952   base::PlatformThread::SetName(kThreadName);
 953   if (main_message_loop_)
 954     main_message_loop_->set_thread_name(kThreadName);
 955
 956   // Register the main thread by instantiating it, but don't call any methods.
 957   main_thread_.reset(
 958       new BrowserThreadImpl(BrowserThread::UI, base::MessageLoop::current()));
 959 }
 960
 961 int BrowserMainLoop::BrowserThreadsStarted() {
 962   TRACE_EVENT0("startup", "BrowserMainLoop::BrowserThreadsStarted");
 963
 964 #if !defined(OS_IOS)
 965   indexed_db_thread_.reset(new base::Thread("IndexedDB"));
 966   indexed_db_thread_->Start();
 967 #endif
 968
 969 #if defined(OS_ANDROID)
 970   // Up the priority of anything that touches with display tasks
 971   // (this thread is UI thread, and io_thread_ is for IPCs).
 972   io_thread_->SetPriority(base::kThreadPriority_Display);
 973   base::PlatformThread::SetThreadPriority(
 974       base::PlatformThread::CurrentHandle(),
 975       base::kThreadPriority_Display);
 976 #endif
 977
 978 #if !defined(OS_IOS)
 979   HistogramSynchronizer::GetInstance();
 980
 981   bool initialize_gpu_data_manager = true;
 982 #if defined(OS_ANDROID)
 983   // On Android, GLSurface::InitializeOneOff() must be called before initalizing
 984   // the GpuDataManagerImpl as it uses the GL bindings. crbug.com/326295
 985   if (!gfx::GLSurface::InitializeOneOff()) {
 986     LOG(ERROR) << "GLSurface::InitializeOneOff failed";
 987     initialize_gpu_data_manager = false;
 988   }
 989 #endif
 990
 991   // Initialize the GpuDataManager before we set up the MessageLoops because
 992   // otherwise we'll trigger the assertion about doing IO on the UI thread.
 993   if (initialize_gpu_data_manager)
 994     GpuDataManagerImpl::GetInstance()->Initialize();
 995
 996   bool always_uses_gpu = true;
 997   bool established_gpu_channel = false;
 998 #if defined(USE_AURA) || defined(OS_MACOSX)
 999   established_gpu_channel = true;
1000   if (!GpuDataManagerImpl::GetInstance()->CanUseGpuBrowserCompositor()) {
1001     established_gpu_channel = always_uses_gpu = false;
1002   }
1003   BrowserGpuChannelHostFactory::Initialize(established_gpu_channel);
1004   ImageTransportFactory::Initialize();
1005 #if defined(USE_AURA)
1006   if (aura::Env::GetInstance()) {
1007     aura::Env::GetInstance()->set_context_factory(GetContextFactory());
1008   }
1009 #endif
1010 #elif defined(OS_ANDROID)
1011   established_gpu_channel = true;
1012   BrowserGpuChannelHostFactory::Initialize(established_gpu_channel);
1013 #endif
1014
1015 #if defined(OS_LINUX) && defined(USE_UDEV)
1016   device_monitor_linux_.reset(new DeviceMonitorLinux());
1017 #elif defined(OS_MACOSX)
1018   device_monitor_mac_.reset(new DeviceMonitorMac());
1019 #endif
1020
1021   // RDH needs the IO thread to be created
1022   {
1023     TRACE_EVENT0("startup",
1024       "BrowserMainLoop::BrowserThreadsStarted:InitResourceDispatcherHost");
1025     resource_dispatcher_host_.reset(new ResourceDispatcherHostImpl());
1026   }
1027
1028   // MediaStreamManager needs the IO thread to be created.
1029   {
1030     TRACE_EVENT0("startup",
1031       "BrowserMainLoop::BrowserThreadsStarted:InitMediaStreamManager");
1032     media_stream_manager_.reset(new MediaStreamManager(audio_manager_.get()));
1033   }
1034
1035   {
1036     TRACE_EVENT0("startup",
1037       "BrowserMainLoop::BrowserThreadsStarted:InitSpeechRecognition");
1038     speech_recognition_manager_.reset(new SpeechRecognitionManagerImpl(
1039         audio_manager_.get(), media_stream_manager_.get()));
1040   }
1041
1042   {
1043     TRACE_EVENT0(
1044         "startup",
1045         "BrowserMainLoop::BrowserThreadsStarted::InitUserInputMonitor");
1046     user_input_monitor_ = media::UserInputMonitor::Create(
1047         io_thread_->message_loop_proxy(), main_thread_->message_loop_proxy());
1048   }
1049
1050   {
1051     TRACE_EVENT0("startup",
1052                  "BrowserMainLoop::BrowserThreadsStarted::TimeZoneMonitor");
1053     time_zone_monitor_ = TimeZoneMonitor::Create();
1054   }
1055
1056   // Alert the clipboard class to which threads are allowed to access the
1057   // clipboard:
1058   std::vector<base::PlatformThreadId> allowed_clipboard_threads;
1059   // The current thread is the UI thread.
1060   allowed_clipboard_threads.push_back(base::PlatformThread::CurrentId());
1061 #if defined(OS_WIN)
1062   // On Windows, clipboards are also used on the File or IO threads.
1063   allowed_clipboard_threads.push_back(file_thread_->thread_id());
1064   allowed_clipboard_threads.push_back(io_thread_->thread_id());
1065 #endif
1066   ui::Clipboard::SetAllowedThreads(allowed_clipboard_threads);
1067
1068   // When running the GPU thread in-process, avoid optimistically starting it
1069   // since creating the GPU thread races against creation of the one-and-only
1070   // ChildProcess instance which is created by the renderer thread.
1071   if (GpuDataManagerImpl::GetInstance()->GpuAccessAllowed(NULL) &&
1072       !established_gpu_channel &&
1073       always_uses_gpu &&
1074       !parsed_command_line_.HasSwitch(switches::kSingleProcess) &&
1075       !parsed_command_line_.HasSwitch(switches::kInProcessGPU)) {
1076     TRACE_EVENT_INSTANT0("gpu", "Post task to launch GPU process",
1077                          TRACE_EVENT_SCOPE_THREAD);
1078     BrowserThread::PostTask(
1079         BrowserThread::IO, FROM_HERE, base::Bind(
1080             base::IgnoreResult(&GpuProcessHost::Get),
1081             GpuProcessHost::GPU_PROCESS_KIND_SANDBOXED,
1082             CAUSE_FOR_GPU_LAUNCH_BROWSER_STARTUP));
1083   }
1084
1085 #if defined(OS_MACOSX)
1086   ThemeHelperMac::GetInstance();
1087   SystemHotkeyHelperMac::GetInstance()->DeferredLoadSystemHotkeys();
1088   if (ShouldEnableBootstrapSandbox()) {
1089     TRACE_EVENT0("startup",
1090         "BrowserMainLoop::BrowserThreadsStarted:BootstrapSandbox");
1091     CHECK(GetBootstrapSandbox());
1092   }
1093 #endif  // defined(OS_MACOSX)
1094
1095 #endif  // !defined(OS_IOS)
1096
1097   return result_code_;
1098 }
1099
1100 bool BrowserMainLoop::InitializeToolkit() {
1101   TRACE_EVENT0("startup", "BrowserMainLoop::InitializeToolkit");
1102   // TODO(evan): this function is rather subtle, due to the variety
1103   // of intersecting ifdefs we have.  To keep it easy to follow, there
1104   // are no #else branches on any #ifs.
1105   // TODO(stevenjb): Move platform specific code into platform specific Parts
1106   // (Need to add InitializeToolkit stage to BrowserParts).
1107   // See also GTK setup in EarlyInitialization, above, and associated comments.
1108
1109 #if defined(OS_WIN)
1110   // Init common control sex.
1111   INITCOMMONCONTROLSEX config;
1112   config.dwSize = sizeof(config);
1113   config.dwICC = ICC_WIN95_CLASSES;
1114   if (!InitCommonControlsEx(&config))
1115     PLOG(FATAL);
1116 #endif
1117
1118 #if defined(USE_AURA)
1119
1120 #if defined(USE_X11)
1121   if (!gfx::GetXDisplay())
1122     return false;
1123 #endif
1124
1125   // Env creates the compositor. Aura widgets need the compositor to be created
1126   // before they can be initialized by the browser.
1127   aura::Env::CreateInstance(true);
1128 #endif  // defined(USE_AURA)
1129
1130   if (parts_)
1131     parts_->ToolkitInitialized();
1132
1133   return true;
1134 }
1135
1136 void BrowserMainLoop::MainMessageLoopRun() {
1137 #if defined(OS_ANDROID)
1138   // Android's main message loop is the Java message loop.
1139   NOTREACHED();
1140 #else
1141   DCHECK(base::MessageLoopForUI::IsCurrent());
1142   if (parameters_.ui_task)
1143     base::MessageLoopForUI::current()->PostTask(FROM_HERE,
1144                                                 *parameters_.ui_task);
1145
1146   base::RunLoop run_loop;
1147   run_loop.Run();
1148 #endif
1149 }
1150
1151 base::FilePath BrowserMainLoop::GetStartupTraceFileName(
1152     const base::CommandLine& command_line) const {
1153   base::FilePath trace_file = command_line.GetSwitchValuePath(
1154       switches::kTraceStartupFile);
1155   // trace_file = "none" means that startup events will show up for the next
1156   // begin/end tracing (via about:tracing or AutomationProxy::BeginTracing/
1157   // EndTracing, for example).
1158   if (trace_file == base::FilePath().AppendASCII("none"))
1159     return trace_file;
1160
1161   if (trace_file.empty()) {
1162 #if defined(OS_ANDROID)
1163     TracingControllerAndroid::GenerateTracingFilePath(&trace_file);
1164 #else
1165     // Default to saving the startup trace into the current dir.
1166     trace_file = base::FilePath().AppendASCII("chrometrace.log");
1167 #endif
1168   }
1169
1170   return trace_file;
1171 }
1172
1173 void BrowserMainLoop::InitStartupTracing(
1174     const base::CommandLine& command_line) {
1175   DCHECK(is_tracing_startup_);
1176
1177   startup_trace_file_ = GetStartupTraceFileName(parsed_command_line_);
1178
1179   std::string delay_str = command_line.GetSwitchValueASCII(
1180       switches::kTraceStartupDuration);
1181   int delay_secs = 5;
1182   if (!delay_str.empty() && !base::StringToInt(delay_str, &delay_secs)) {
1183     DLOG(WARNING) << "Could not parse --" << switches::kTraceStartupDuration
1184         << "=" << delay_str << " defaulting to 5 (secs)";
1185     delay_secs = 5;
1186   }
1187
1188   startup_trace_timer_.Start(FROM_HERE,
1189                              base::TimeDelta::FromSeconds(delay_secs),
1190                              this,
1191                              &BrowserMainLoop::EndStartupTracing);
1192 }
1193
1194 void BrowserMainLoop::EndStartupTracing() {
1195   is_tracing_startup_ = false;
1196   TracingController::GetInstance()->DisableRecording(
1197       TracingController::CreateFileSink(
1198           startup_trace_file_,
1199           base::Bind(OnStoppedStartupTracing, startup_trace_file_)));
1200 }
1201
1202 }  // namespace content