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/location.h"
  10 #include "base/logging.h"
  11 #include "base/memory/memory_pressure_monitor.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/profiler/scoped_profile.h"
  19 #include "base/run_loop.h"
  20 #include "base/single_thread_task_runner.h"
  21 #include "base/strings/string_number_conversions.h"
  22 #include "base/strings/string_split.h"
  23 #include "base/system_monitor/system_monitor.h"
  24 #include "base/thread_task_runner_handle.h"
  25 #include "base/threading/thread_restrictions.h"
  26 #include "base/timer/hi_res_timer_manager.h"
  27 #include "base/trace_event/memory_dump_manager.h"
  28 #include "base/trace_event/trace_event.h"
  29 #include "content/browser/browser_thread_impl.h"
  30 #include "content/browser/device_sensors/device_inertial_sensor_service.h"
  31 #include "content/browser/dom_storage/dom_storage_area.h"
  32 #include "content/browser/download/save_file_manager.h"
  33 #include "content/browser/gamepad/gamepad_service.h"
  34 #include "content/browser/gpu/browser_gpu_channel_host_factory.h"
  35 #include "content/browser/gpu/browser_gpu_memory_buffer_manager.h"
  36 #include "content/browser/gpu/compositor_util.h"
  37 #include "content/browser/gpu/gpu_data_manager_impl.h"
  38 #include "content/browser/gpu/gpu_process_host.h"
  39 #include "content/browser/gpu/gpu_process_host_ui_shim.h"
  40 #include "content/browser/histogram_synchronizer.h"
  41 #include "content/browser/loader/resource_dispatcher_host_impl.h"
  42 #include "content/browser/media/media_internals.h"
  43 #include "content/browser/mojo/mojo_shell_context.h"
  44 #include "content/browser/net/browser_online_state_observer.h"
  45 #include "content/browser/renderer_host/media/media_stream_manager.h"
  46 #include "content/browser/speech/speech_recognition_manager_impl.h"
  47 #include "content/browser/startup_task_runner.h"
  48 #include "content/browser/time_zone_monitor.h"
  49 #include "content/browser/webui/content_web_ui_controller_factory.h"
  50 #include "content/browser/webui/url_data_manager.h"
  51 #include "content/common/content_switches_internal.h"
  52 #include "content/common/host_discardable_shared_memory_manager.h"
  53 #include "content/common/host_shared_bitmap_manager.h"
  54 #include "content/public/browser/browser_main_parts.h"
  55 #include "content/public/browser/content_browser_client.h"
  56 #include "content/public/browser/render_process_host.h"
  57 #include "content/public/browser/tracing_controller.h"
  58 #include "content/public/common/content_switches.h"
  59 #include "content/public/common/main_function_params.h"
  60 #include "content/public/common/result_codes.h"
  61 #include "crypto/nss_util.h"
  62 #include "device/battery/battery_status_service.h"
  63 #include "media/audio/audio_manager.h"
  64 #include "media/base/media.h"
  65 #include "media/base/user_input_monitor.h"
  66 #include "media/midi/midi_manager.h"
  67 #include "net/base/network_change_notifier.h"
  68 #include "net/socket/client_socket_factory.h"
  69 #include "net/ssl/ssl_config_service.h"
  70 #include "ui/base/clipboard/clipboard.h"
  71
  72 #if defined(USE_AURA) || (defined(OS_MACOSX) && !defined(OS_IOS))
  73 #include "content/browser/compositor/image_transport_factory.h"
  74 #endif
  75
  76 #if defined(USE_AURA)
  77 #include "content/public/browser/context_factory.h"
  78 #include "ui/aura/env.h"
  79 #endif
  80
  81 #if !defined(OS_IOS)
  82 #include "content/browser/renderer_host/render_process_host_impl.h"
  83 #endif
  84
  85 #if defined(OS_ANDROID)
  86 #include "base/android/jni_android.h"
  87 #include "content/browser/android/browser_startup_controller.h"
  88 #include "content/browser/android/browser_surface_texture_manager.h"
  89 #include "content/browser/android/in_process_surface_texture_manager.h"
  90 #include "content/browser/android/tracing_controller_android.h"
  91 #include "content/browser/screen_orientation/screen_orientation_delegate_android.h"
  92 #include "content/public/browser/screen_orientation_provider.h"
  93 #include "ui/gl/gl_surface.h"
  94 #endif
  95
  96 #if defined(OS_MACOSX)
  97 #include "media/base/mac/avfoundation_glue.h"
  98 #endif
  99
 100 #if defined(OS_MACOSX) && !defined(OS_IOS)
 101 #include "base/memory/memory_pressure_monitor_mac.h"
 102 #include "content/browser/bootstrap_sandbox_mac.h"
 103 #include "content/browser/browser_io_surface_manager_mac.h"
 104 #include "content/browser/cocoa/system_hotkey_helper_mac.h"
 105 #include "content/browser/compositor/browser_compositor_view_mac.h"
 106 #include "content/browser/in_process_io_surface_manager_mac.h"
 107 #include "content/browser/theme_helper_mac.h"
 108 #endif
 109
 110 #if defined(OS_WIN)
 111 #include <windows.h>
 112 #include <commctrl.h>
 113 #include <shellapi.h>
 114
 115 #include "base/memory/memory_pressure_monitor_win.h"
 116 #include "content/browser/system_message_window_win.h"
 117 #include "content/common/sandbox_win.h"
 118 #include "net/base/winsock_init.h"
 119 #include "ui/base/l10n/l10n_util_win.h"
 120 #endif
 121
 122 #if defined(OS_CHROMEOS)
 123 #include "base/memory/memory_pressure_monitor_chromeos.h"
 124 #include "chromeos/chromeos_switches.h"
 125 #endif
 126
 127 #if defined(USE_GLIB)
 128 #include <glib-object.h>
 129 #endif
 130
 131 #if defined(OS_LINUX) && defined(USE_UDEV)
 132 #include "content/browser/device_monitor_udev.h"
 133 #elif defined(OS_MACOSX) && !defined(OS_IOS)
 134 #include "content/browser/device_monitor_mac.h"
 135 #endif
 136
 137 #if defined(OS_POSIX) && !defined(OS_MACOSX)
 138 #include "content/browser/renderer_host/render_sandbox_host_linux.h"
 139 #include "content/browser/zygote_host/zygote_host_impl_linux.h"
 140 #include "sandbox/linux/suid/client/setuid_sandbox_host.h"
 141 #endif
 142
 143 #if defined(ENABLE_PLUGINS)
 144 #include "content/browser/plugin_service_impl.h"
 145 #endif
 146
 147 #if defined(TCMALLOC_TRACE_MEMORY_SUPPORTED)
 148 #include "third_party/tcmalloc/chromium/src/gperftools/heap-profiler.h"
 149 #endif
 150
 151 #if defined(USE_X11)
 152 #include "ui/gfx/x/x11_connection.h"
 153 #include "ui/gfx/x/x11_types.h"
 154 #endif
 155
 156 // One of the linux specific headers defines this as a macro.
 157 #ifdef DestroyAll
 158 #undef DestroyAll
 159 #endif
 160
 161 namespace content {
 162 namespace {
 163
 164 #if defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
 165 void SetupSandbox(const base::CommandLine& parsed_command_line) {
 166   TRACE_EVENT0("startup", "SetupSandbox");
 167   base::FilePath sandbox_binary;
 168
 169   scoped_ptr<sandbox::SetuidSandboxHost> setuid_sandbox_host(
 170       sandbox::SetuidSandboxHost::Create());
 171
 172   const bool want_setuid_sandbox =
 173       !parsed_command_line.HasSwitch(switches::kNoSandbox) &&
 174       !parsed_command_line.HasSwitch(switches::kDisableSetuidSandbox) &&
 175       !setuid_sandbox_host->IsDisabledViaEnvironment();
 176
 177   static const char no_suid_error[] =
 178       "Running without the SUID sandbox! See "
 179       "https://code.google.com/p/chromium/wiki/LinuxSUIDSandboxDevelopment "
 180       "for more information on developing with the sandbox on.";
 181   if (want_setuid_sandbox) {
 182     sandbox_binary = setuid_sandbox_host->GetSandboxBinaryPath();
 183     if (sandbox_binary.empty()) {
 184       // This needs to be fatal. Talk to security@chromium.org if you feel
 185       // otherwise.
 186       LOG(FATAL) << no_suid_error;
 187     }
 188   } else {
 189     LOG(ERROR) << no_suid_error;
 190   }
 191
 192   // Tickle the sandbox host and zygote host so they fork now.
 193   RenderSandboxHostLinux::GetInstance()->Init();
 194   ZygoteHostImpl::GetInstance()->Init(sandbox_binary.value());
 195 }
 196 #endif
 197
 198 #if defined(USE_GLIB)
 199 static void GLibLogHandler(const gchar* log_domain,
 200                            GLogLevelFlags log_level,
 201                            const gchar* message,
 202                            gpointer userdata) {
 203   if (!log_domain)
 204     log_domain = "<unknown>";
 205   if (!message)
 206     message = "<no message>";
 207
 208   if (strstr(message, "Unable to retrieve the file info for")) {
 209     LOG(ERROR) << "GTK File code error: " << message;
 210   } else if (strstr(message, "Could not find the icon") &&
 211              strstr(log_domain, "Gtk")) {
 212     LOG(ERROR) << "GTK icon error: " << message;
 213   } else if (strstr(message, "Theme file for default has no") ||
 214              strstr(message, "Theme directory") ||
 215              strstr(message, "theme pixmap") ||
 216              strstr(message, "locate theme engine")) {
 217     LOG(ERROR) << "GTK theme error: " << message;
 218   } else if (strstr(message, "Unable to create Ubuntu Menu Proxy") &&
 219              strstr(log_domain, "<unknown>")) {
 220     LOG(ERROR) << "GTK menu proxy create failed";
 221   } else if (strstr(message, "Out of memory") &&
 222              strstr(log_domain, "<unknown>")) {
 223     LOG(ERROR) << "DBus call timeout or out of memory: "
 224                << "http://crosbug.com/15496";
 225   } else if (strstr(message, "Could not connect: Connection refused") &&
 226              strstr(log_domain, "<unknown>")) {
 227     LOG(ERROR) << "DConf settings backend could not connect to session bus: "
 228                << "http://crbug.com/179797";
 229   } else if (strstr(message, "Attempting to store changes into") ||
 230              strstr(message, "Attempting to set the permissions of")) {
 231     LOG(ERROR) << message << " (http://bugs.chromium.org/161366)";
 232   } else if (strstr(message, "drawable is not a native X11 window")) {
 233     LOG(ERROR) << message << " (http://bugs.chromium.org/329991)";
 234   } else if (strstr(message, "Cannot do system-bus activation with no user")) {
 235     LOG(ERROR) << message << " (http://crbug.com/431005)";
 236   } else {
 237     LOG(DFATAL) << log_domain << ": " << message;
 238   }
 239 }
 240
 241 static void SetUpGLibLogHandler() {
 242   // Register GLib-handled assertions to go through our logging system.
 243   const char* kLogDomains[] = { NULL, "Gtk", "Gdk", "GLib", "GLib-GObject" };
 244   for (size_t i = 0; i < arraysize(kLogDomains); i++) {
 245     g_log_set_handler(kLogDomains[i],
 246                       static_cast<GLogLevelFlags>(G_LOG_FLAG_RECURSION |
 247                                                   G_LOG_FLAG_FATAL |
 248                                                   G_LOG_LEVEL_ERROR |
 249                                                   G_LOG_LEVEL_CRITICAL |
 250                                                   G_LOG_LEVEL_WARNING),
 251                       GLibLogHandler,
 252                       NULL);
 253   }
 254 }
 255 #endif
 256
 257 void OnStoppedStartupTracing(const base::FilePath& trace_file) {
 258   VLOG(0) << "Completed startup tracing to " << trace_file.value();
 259 }
 260
 261 // Disable optimizations for this block of functions so the compiler doesn't
 262 // merge them all together. This makes it possible to tell what thread was
 263 // unresponsive by inspecting the callstack.
 264 MSVC_DISABLE_OPTIMIZE()
 265 MSVC_PUSH_DISABLE_WARNING(4748)
 266
 267 NOINLINE void ResetThread_DB(scoped_ptr<BrowserProcessSubThread> thread) {
 268   volatile int inhibit_comdat = __LINE__;
 269   ALLOW_UNUSED_LOCAL(inhibit_comdat);
 270   thread.reset();
 271 }
 272
 273 NOINLINE void ResetThread_FILE(scoped_ptr<BrowserProcessSubThread> thread) {
 274   volatile int inhibit_comdat = __LINE__;
 275   ALLOW_UNUSED_LOCAL(inhibit_comdat);
 276   thread.reset();
 277 }
 278
 279 NOINLINE void ResetThread_FILE_USER_BLOCKING(
 280     scoped_ptr<BrowserProcessSubThread> thread) {
 281   volatile int inhibit_comdat = __LINE__;
 282   ALLOW_UNUSED_LOCAL(inhibit_comdat);
 283   thread.reset();
 284 }
 285
 286 NOINLINE void ResetThread_PROCESS_LAUNCHER(
 287     scoped_ptr<BrowserProcessSubThread> thread) {
 288   volatile int inhibit_comdat = __LINE__;
 289   ALLOW_UNUSED_LOCAL(inhibit_comdat);
 290   thread.reset();
 291 }
 292
 293 NOINLINE void ResetThread_CACHE(scoped_ptr<BrowserProcessSubThread> thread) {
 294   volatile int inhibit_comdat = __LINE__;
 295   ALLOW_UNUSED_LOCAL(inhibit_comdat);
 296   thread.reset();
 297 }
 298
 299 NOINLINE void ResetThread_IO(scoped_ptr<BrowserProcessSubThread> thread) {
 300   volatile int inhibit_comdat = __LINE__;
 301   ALLOW_UNUSED_LOCAL(inhibit_comdat);
 302   thread.reset();
 303 }
 304
 305 #if !defined(OS_IOS)
 306 NOINLINE void ResetThread_IndexedDb(scoped_ptr<base::Thread> thread) {
 307   volatile int inhibit_comdat = __LINE__;
 308   ALLOW_UNUSED_LOCAL(inhibit_comdat);
 309   thread.reset();
 310 }
 311 #endif
 312
 313 MSVC_POP_WARNING()
 314 MSVC_ENABLE_OPTIMIZE();
 315
 316 #if defined(OS_WIN)
 317 // Creates a memory pressure monitor using automatic thresholds, or those
 318 // specified on the command-line. Ownership is passed to the caller.
 319 base::win::MemoryPressureMonitor* CreateWinMemoryPressureMonitor(
 320     const base::CommandLine& parsed_command_line) {
 321   std::vector<std::string> thresholds;
 322   base::SplitString(
 323       parsed_command_line.GetSwitchValueASCII(
 324           switches::kMemoryPressureThresholdsMb),
 325       ',',
 326       &thresholds);
 327
 328   int moderate_threshold_mb = 0;
 329   int critical_threshold_mb = 0;
 330   if (thresholds.size() == 2 &&
 331       base::StringToInt(thresholds[0], &moderate_threshold_mb) &&
 332       base::StringToInt(thresholds[1], &critical_threshold_mb) &&
 333       moderate_threshold_mb >= critical_threshold_mb &&
 334       critical_threshold_mb >= 0) {
 335     return new base::win::MemoryPressureMonitor(moderate_threshold_mb,
 336                                                 critical_threshold_mb);
 337   }
 338
 339   // In absence of valid switches use the automatic defaults.
 340   return new base::win::MemoryPressureMonitor();
 341 }
 342 #endif  // defined(OS_WIN)
 343
 344 }  // namespace
 345
 346 // The currently-running BrowserMainLoop.  There can be one or zero.
 347 BrowserMainLoop* g_current_browser_main_loop = NULL;
 348
 349 // For measuring memory usage after each task. Behind a command line flag.
 350 class BrowserMainLoop::MemoryObserver : public base::MessageLoop::TaskObserver {
 351  public:
 352   MemoryObserver() {}
 353   ~MemoryObserver() override {}
 354
 355   void WillProcessTask(const base::PendingTask& pending_task) override {}
 356
 357   void DidProcessTask(const base::PendingTask& pending_task) override {
 358 #if !defined(OS_IOS)  // No ProcessMetrics on IOS.
 359     scoped_ptr<base::ProcessMetrics> process_metrics(
 360         base::ProcessMetrics::CreateProcessMetrics(
 361 #if defined(OS_MACOSX)
 362             base::GetCurrentProcessHandle(), NULL));
 363 #else
 364             base::GetCurrentProcessHandle()));
 365 #endif
 366     size_t private_bytes;
 367     process_metrics->GetMemoryBytes(&private_bytes, NULL);
 368     LOCAL_HISTOGRAM_MEMORY_KB("Memory.BrowserUsed", private_bytes >> 10);
 369 #endif
 370   }
 371  private:
 372   DISALLOW_COPY_AND_ASSIGN(MemoryObserver);
 373 };
 374
 375
 376 // BrowserMainLoop construction / destruction =============================
 377
 378 BrowserMainLoop* BrowserMainLoop::GetInstance() {
 379   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 380   return g_current_browser_main_loop;
 381 }
 382
 383 BrowserMainLoop::BrowserMainLoop(const MainFunctionParams& parameters)
 384     : parameters_(parameters),
 385       parsed_command_line_(parameters.command_line),
 386       result_code_(RESULT_CODE_NORMAL_EXIT),
 387       created_threads_(false),
 388       // ContentMainRunner should have enabled tracing of the browser process
 389       // when kTraceStartup is in the command line.
 390       is_tracing_startup_(
 391           parameters.command_line.HasSwitch(switches::kTraceStartup)) {
 392   DCHECK(!g_current_browser_main_loop);
 393   g_current_browser_main_loop = this;
 394 }
 395
 396 BrowserMainLoop::~BrowserMainLoop() {
 397   DCHECK_EQ(this, g_current_browser_main_loop);
 398 #if !defined(OS_IOS)
 399   ui::Clipboard::DestroyClipboardForCurrentThread();
 400 #endif  // !defined(OS_IOS)
 401   g_current_browser_main_loop = NULL;
 402 }
 403
 404 void BrowserMainLoop::Init() {
 405   TRACE_EVENT0("startup", "BrowserMainLoop::Init");
 406   TRACK_SCOPED_REGION("Startup", "BrowserMainLoop::Init");
 407
 408   parts_.reset(
 409       GetContentClient()->browser()->CreateBrowserMainParts(parameters_));
 410 }
 411
 412 // BrowserMainLoop stages ==================================================
 413
 414 void BrowserMainLoop::EarlyInitialization() {
 415   TRACE_EVENT0("startup", "BrowserMainLoop::EarlyInitialization");
 416   TRACK_SCOPED_REGION("Startup", "BrowserMainLoop::EarlyInitialization");
 417
 418 #if defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
 419   // No thread should be created before this call, as SetupSandbox()
 420   // will end-up using fork().
 421   SetupSandbox(parsed_command_line_);
 422 #endif
 423
 424 #if defined(USE_X11)
 425   if (UsingInProcessGpu()) {
 426     if (!gfx::InitializeThreadedX11()) {
 427       LOG(ERROR) << "Failed to put Xlib into threaded mode.";
 428     }
 429   }
 430 #endif
 431
 432   // GLib's spawning of new processes is buggy, so it's important that at this
 433   // point GLib does not need to start DBUS. Chrome should always start with
 434   // DBUS_SESSION_BUS_ADDRESS properly set. See crbug.com/309093.
 435 #if defined(USE_GLIB)
 436   // g_type_init will be deprecated in 2.36. 2.35 is the development
 437   // version for 2.36, hence do not call g_type_init starting 2.35.
 438   // http://developer.gnome.org/gobject/unstable/gobject-Type-Information.html#g-type-init
 439 #if !GLIB_CHECK_VERSION(2, 35, 0)
 440   // GLib type system initialization. Needed at least for gconf,
 441   // used in net/proxy/proxy_config_service_linux.cc. Most likely
 442   // this is superfluous as gtk_init() ought to do this. It's
 443   // definitely harmless, so retained as a reminder of this
 444   // requirement for gconf.
 445   g_type_init();
 446 #endif
 447
 448   SetUpGLibLogHandler();
 449 #endif
 450
 451   if (parts_)
 452     parts_->PreEarlyInitialization();
 453
 454 #if defined(OS_MACOSX)
 455   // We use quite a few file descriptors for our IPC, and the default limit on
 456   // the Mac is low (256), so bump it up.
 457   base::SetFdLimit(1024);
 458 #endif
 459
 460 #if defined(OS_WIN)
 461   net::EnsureWinsockInit();
 462 #endif
 463
 464 #if !defined(USE_OPENSSL)
 465   // We want to be sure to init NSPR on the main thread.
 466   crypto::EnsureNSPRInit();
 467 #endif  // !defined(USE_OPENSSL)
 468
 469 #if !defined(OS_IOS)
 470   if (parsed_command_line_.HasSwitch(switches::kRendererProcessLimit)) {
 471     std::string limit_string = parsed_command_line_.GetSwitchValueASCII(
 472         switches::kRendererProcessLimit);
 473     size_t process_limit;
 474     if (base::StringToSizeT(limit_string, &process_limit)) {
 475       RenderProcessHost::SetMaxRendererProcessCount(process_limit);
 476     }
 477   }
 478 #endif  // !defined(OS_IOS)
 479
 480   // TODO(boliu): kSingleProcess check is a temporary workaround for
 481   // in-process Android WebView. crbug.com/503724 tracks proper fix.
 482   if (!parsed_command_line_.HasSwitch(switches::kSingleProcess)) {
 483     base::DiscardableMemoryAllocator::SetInstance(
 484         HostDiscardableSharedMemoryManager::current());
 485   }
 486
 487   if (parts_)
 488     parts_->PostEarlyInitialization();
 489 }
 490
 491 void BrowserMainLoop::PreMainMessageLoopStart() {
 492   if (parts_) {
 493     TRACE_EVENT0("startup",
 494         "BrowserMainLoop::MainMessageLoopStart:PreMainMessageLoopStart");
 495     parts_->PreMainMessageLoopStart();
 496   }
 497
 498 #if defined(OS_WIN)
 499   // If we're running tests (ui_task is non-null), then the ResourceBundle
 500   // has already been initialized.
 501   if (!parameters_.ui_task) {
 502     // Override the configured locale with the user's preferred UI language.
 503     l10n_util::OverrideLocaleWithUILanguageList();
 504   }
 505 #endif
 506 }
 507
 508 void BrowserMainLoop::MainMessageLoopStart() {
 509   // DO NOT add more code here. Use PreMainMessageLoopStart() above or
 510   // PostMainMessageLoopStart() below.
 511
 512   TRACE_EVENT0("startup", "BrowserMainLoop::MainMessageLoopStart");
 513   TRACK_SCOPED_REGION("Startup", "BrowserMainLoop::MainMessageLoopStart");
 514
 515   // Create a MessageLoop if one does not already exist for the current thread.
 516   if (!base::MessageLoop::current())
 517     main_message_loop_.reset(new base::MessageLoopForUI);
 518
 519   InitializeMainThread();
 520 }
 521
 522 void BrowserMainLoop::PostMainMessageLoopStart() {
 523   {
 524     TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:SystemMonitor");
 525     system_monitor_.reset(new base::SystemMonitor);
 526   }
 527   {
 528     TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:PowerMonitor");
 529     scoped_ptr<base::PowerMonitorSource> power_monitor_source(
 530       new base::PowerMonitorDeviceSource());
 531     power_monitor_.reset(new base::PowerMonitor(power_monitor_source.Pass()));
 532   }
 533   {
 534     TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:HighResTimerManager");
 535     hi_res_timer_manager_.reset(new base::HighResolutionTimerManager);
 536   }
 537   {
 538     TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:NetworkChangeNotifier");
 539     network_change_notifier_.reset(net::NetworkChangeNotifier::Create());
 540   }
 541
 542 #if !defined(OS_IOS)
 543   {
 544     TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:MediaFeatures");
 545     media::InitializeMediaLibrary();
 546   }
 547   {
 548     TRACE_EVENT0("startup",
 549                  "BrowserMainLoop::Subsystem:ContentWebUIController");
 550     WebUIControllerFactory::RegisterFactory(
 551         ContentWebUIControllerFactory::GetInstance());
 552   }
 553
 554   {
 555     TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:OnlineStateObserver");
 556     online_state_observer_.reset(new BrowserOnlineStateObserver);
 557   }
 558
 559   {
 560     system_stats_monitor_.reset(
 561         new base::trace_event::TraceEventSystemStatsMonitor(
 562             base::ThreadTaskRunnerHandle::Get()));
 563   }
 564 #endif  // !defined(OS_IOS)
 565
 566 #if defined(OS_WIN)
 567   system_message_window_.reset(new SystemMessageWindowWin);
 568 #endif
 569
 570   if (parts_)
 571     parts_->PostMainMessageLoopStart();
 572
 573 #if !defined(OS_IOS)
 574   // Start tracing to a file if needed. Only do this after starting the main
 575   // message loop to avoid calling MessagePumpForUI::ScheduleWork() before
 576   // MessagePumpForUI::Start() as it will crash the browser.
 577   if (is_tracing_startup_) {
 578     TRACE_EVENT0("startup", "BrowserMainLoop::InitStartupTracing");
 579     InitStartupTracing(parsed_command_line_);
 580   }
 581 #endif  // !defined(OS_IOS)
 582
 583 #if defined(OS_ANDROID)
 584   {
 585     TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:SurfaceTextureManager");
 586     if (parsed_command_line_.HasSwitch(switches::kSingleProcess)) {
 587       SurfaceTextureManager::SetInstance(
 588           InProcessSurfaceTextureManager::GetInstance());
 589     } else {
 590       SurfaceTextureManager::SetInstance(
 591           BrowserSurfaceTextureManager::GetInstance());
 592     }
 593   }
 594
 595   if (!parsed_command_line_.HasSwitch(
 596       switches::kDisableScreenOrientationLock)) {
 597     TRACE_EVENT0("startup",
 598                  "BrowserMainLoop::Subsystem:ScreenOrientationProvider");
 599     screen_orientation_delegate_.reset(
 600         new ScreenOrientationDelegateAndroid());
 601     ScreenOrientationProvider::SetDelegate(screen_orientation_delegate_.get());
 602   }
 603 #endif
 604
 605 #if defined(OS_MACOSX) && !defined(OS_IOS)
 606   {
 607     TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:IOSurfaceManager");
 608     if (parsed_command_line_.HasSwitch(switches::kSingleProcess)) {
 609       IOSurfaceManager::SetInstance(InProcessIOSurfaceManager::GetInstance());
 610     } else {
 611       IOSurfaceManager::SetInstance(BrowserIOSurfaceManager::GetInstance());
 612     }
 613   }
 614 #endif
 615
 616   if (parsed_command_line_.HasSwitch(switches::kMemoryMetrics)) {
 617     TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:MemoryObserver");
 618     memory_observer_.reset(new MemoryObserver());
 619     base::MessageLoop::current()->AddTaskObserver(memory_observer_.get());
 620   }
 621
 622   if (parsed_command_line_.HasSwitch(
 623           switches::kEnableAggressiveDOMStorageFlushing)) {
 624     TRACE_EVENT0("startup",
 625                  "BrowserMainLoop::Subsystem:EnableAggressiveCommitDelay");
 626     DOMStorageArea::EnableAggressiveCommitDelay();
 627   }
 628
 629   base::trace_event::MemoryDumpManager::GetInstance()->Initialize();
 630
 631   // Enable the dump providers.
 632   base::trace_event::MemoryDumpManager::GetInstance()->RegisterDumpProvider(
 633       HostSharedBitmapManager::current());
 634
 635 #if defined(TCMALLOC_TRACE_MEMORY_SUPPORTED)
 636   trace_memory_controller_.reset(new base::trace_event::TraceMemoryController(
 637       base::MessageLoop::current()->task_runner(),
 638       ::HeapProfilerWithPseudoStackStart, ::HeapProfilerStop,
 639       ::GetHeapProfile));
 640 #endif
 641 }
 642
 643 int BrowserMainLoop::PreCreateThreads() {
 644   // Need to initialize in-process GpuDataManager before creating threads.
 645   // It's unsafe to append the gpu command line switches to the global
 646   // CommandLine::ForCurrentProcess object after threads are created.
 647   // Also need to initialize before BrowserMainParts::PreCreateThreads, so
 648   // BrowserMainParts has a hook to set GpuDataManager strings before
 649   // starting Gpu process.
 650   GpuDataManagerImpl::GetInstance()->Initialize();
 651
 652   if (parts_) {
 653     TRACE_EVENT0("startup",
 654         "BrowserMainLoop::CreateThreads:PreCreateThreads");
 655     TRACK_SCOPED_REGION("Startup", "BrowserMainLoop::PreCreateThreads");
 656
 657     result_code_ = parts_->PreCreateThreads();
 658   }
 659
 660   // TODO(chrisha): Abstract away this construction mess to a helper function,
 661   // once MemoryPressureMonitor is made a concrete class.
 662 #if defined(OS_CHROMEOS)
 663   if (chromeos::switches::MemoryPressureHandlingEnabled()) {
 664     memory_pressure_monitor_.reset(new base::chromeos::MemoryPressureMonitor(
 665         chromeos::switches::GetMemoryPressureThresholds()));
 666   }
 667 #elif defined(OS_MACOSX) && !defined(OS_IOS)
 668   memory_pressure_monitor_.reset(new base::mac::MemoryPressureMonitor());
 669 #elif defined(OS_WIN)
 670   memory_pressure_monitor_.reset(CreateWinMemoryPressureMonitor(
 671       parsed_command_line_));
 672 #endif
 673
 674 #if defined(ENABLE_PLUGINS)
 675   // Prior to any processing happening on the io thread, we create the
 676   // plugin service as it is predominantly used from the io thread,
 677   // but must be created on the main thread. The service ctor is
 678   // inexpensive and does not invoke the io_thread() accessor.
 679   {
 680     TRACE_EVENT0("startup", "BrowserMainLoop::CreateThreads:PluginService");
 681     PluginService::GetInstance()->Init();
 682   }
 683 #endif
 684
 685 #if defined(OS_MACOSX)
 686   {
 687     // Initialize AVFoundation if supported, for audio and video.
 688     TRACE_EVENT0("startup",
 689                  "BrowserMainLoop::CreateThreads:InitializeAVFoundation");
 690     AVFoundationGlue::InitializeAVFoundation();
 691   }
 692 #endif
 693
 694 #if !defined(OS_IOS) && (!defined(GOOGLE_CHROME_BUILD) || defined(OS_ANDROID))
 695   // Single-process is an unsupported and not fully tested mode, so
 696   // don't enable it for official Chrome builds (except on Android).
 697   if (parsed_command_line_.HasSwitch(switches::kSingleProcess))
 698     RenderProcessHost::SetRunRendererInProcess(true);
 699 #endif
 700
 701   return result_code_;
 702 }
 703
 704 void BrowserMainLoop::CreateStartupTasks() {
 705   TRACE_EVENT0("startup", "BrowserMainLoop::CreateStartupTasks");
 706   TRACK_SCOPED_REGION("Startup", "BrowserMainLoop::CreateStartupTasks");
 707
 708   // First time through, we really want to create all the tasks
 709   if (!startup_task_runner_.get()) {
 710 #if defined(OS_ANDROID)
 711     startup_task_runner_ = make_scoped_ptr(
 712         new StartupTaskRunner(base::Bind(&BrowserStartupComplete),
 713                               base::ThreadTaskRunnerHandle::Get()));
 714 #else
 715     startup_task_runner_ = make_scoped_ptr(
 716         new StartupTaskRunner(base::Callback<void(int)>(),
 717                               base::ThreadTaskRunnerHandle::Get()));
 718 #endif
 719     StartupTask pre_create_threads =
 720         base::Bind(&BrowserMainLoop::PreCreateThreads, base::Unretained(this));
 721     startup_task_runner_->AddTask(pre_create_threads);
 722
 723     StartupTask create_threads =
 724         base::Bind(&BrowserMainLoop::CreateThreads, base::Unretained(this));
 725     startup_task_runner_->AddTask(create_threads);
 726
 727     StartupTask browser_thread_started = base::Bind(
 728         &BrowserMainLoop::BrowserThreadsStarted, base::Unretained(this));
 729     startup_task_runner_->AddTask(browser_thread_started);
 730
 731     StartupTask pre_main_message_loop_run = base::Bind(
 732         &BrowserMainLoop::PreMainMessageLoopRun, base::Unretained(this));
 733     startup_task_runner_->AddTask(pre_main_message_loop_run);
 734
 735 #if defined(OS_ANDROID)
 736     if (BrowserMayStartAsynchronously()) {
 737       startup_task_runner_->StartRunningTasksAsync();
 738     }
 739 #endif
 740   }
 741 #if defined(OS_ANDROID)
 742   if (!BrowserMayStartAsynchronously()) {
 743     // A second request for asynchronous startup can be ignored, so
 744     // StartupRunningTasksAsync is only called first time through. If, however,
 745     // this is a request for synchronous startup then it must override any
 746     // previous call for async startup, so we call RunAllTasksNow()
 747     // unconditionally.
 748     startup_task_runner_->RunAllTasksNow();
 749   }
 750 #else
 751   startup_task_runner_->RunAllTasksNow();
 752 #endif
 753 }
 754
 755 int BrowserMainLoop::CreateThreads() {
 756   TRACE_EVENT0("startup", "BrowserMainLoop::CreateThreads");
 757   TRACK_SCOPED_REGION("Startup", "BrowserMainLoop::CreateThreads");
 758
 759   base::Thread::Options io_message_loop_options;
 760   io_message_loop_options.message_loop_type = base::MessageLoop::TYPE_IO;
 761   base::Thread::Options ui_message_loop_options;
 762   ui_message_loop_options.message_loop_type = base::MessageLoop::TYPE_UI;
 763
 764   // Start threads in the order they occur in the BrowserThread::ID
 765   // enumeration, except for BrowserThread::UI which is the main
 766   // thread.
 767   //
 768   // Must be size_t so we can increment it.
 769   for (size_t thread_id = BrowserThread::UI + 1;
 770        thread_id < BrowserThread::ID_COUNT;
 771        ++thread_id) {
 772     scoped_ptr<BrowserProcessSubThread>* thread_to_start = NULL;
 773     base::Thread::Options options;
 774
 775     switch (thread_id) {
 776       case BrowserThread::DB:
 777         TRACE_EVENT_BEGIN1("startup",
 778             "BrowserMainLoop::CreateThreads:start",
 779             "Thread", "BrowserThread::DB");
 780         thread_to_start = &db_thread_;
 781         options.timer_slack = base::TIMER_SLACK_MAXIMUM;
 782         break;
 783       case BrowserThread::FILE_USER_BLOCKING:
 784         TRACE_EVENT_BEGIN1("startup",
 785             "BrowserMainLoop::CreateThreads:start",
 786             "Thread", "BrowserThread::FILE_USER_BLOCKING");
 787         thread_to_start = &file_user_blocking_thread_;
 788         break;
 789       case BrowserThread::FILE:
 790         TRACE_EVENT_BEGIN1("startup",
 791             "BrowserMainLoop::CreateThreads:start",
 792             "Thread", "BrowserThread::FILE");
 793         thread_to_start = &file_thread_;
 794 #if defined(OS_WIN)
 795         // On Windows, the FILE thread needs to be have a UI message loop
 796         // which pumps messages in such a way that Google Update can
 797         // communicate back to us.
 798         options = ui_message_loop_options;
 799 #else
 800         options = io_message_loop_options;
 801 #endif
 802         options.timer_slack = base::TIMER_SLACK_MAXIMUM;
 803         break;
 804       case BrowserThread::PROCESS_LAUNCHER:
 805         TRACE_EVENT_BEGIN1("startup",
 806             "BrowserMainLoop::CreateThreads:start",
 807             "Thread", "BrowserThread::PROCESS_LAUNCHER");
 808         thread_to_start = &process_launcher_thread_;
 809         options.timer_slack = base::TIMER_SLACK_MAXIMUM;
 810         break;
 811       case BrowserThread::CACHE:
 812         TRACE_EVENT_BEGIN1("startup",
 813             "BrowserMainLoop::CreateThreads:start",
 814             "Thread", "BrowserThread::CACHE");
 815         thread_to_start = &cache_thread_;
 816         options = io_message_loop_options;
 817         options.timer_slack = base::TIMER_SLACK_MAXIMUM;
 818         break;
 819       case BrowserThread::IO:
 820         TRACE_EVENT_BEGIN1("startup",
 821             "BrowserMainLoop::CreateThreads:start",
 822             "Thread", "BrowserThread::IO");
 823         thread_to_start = &io_thread_;
 824         options = io_message_loop_options;
 825 #if defined(OS_ANDROID)
 826         // Up the priority of the |io_thread_| as some of its IPCs relate to
 827         // display tasks.
 828         options.priority = base::ThreadPriority::DISPLAY;
 829 #endif
 830         break;
 831       case BrowserThread::UI:
 832       case BrowserThread::ID_COUNT:
 833       default:
 834         NOTREACHED();
 835         break;
 836     }
 837
 838     BrowserThread::ID id = static_cast<BrowserThread::ID>(thread_id);
 839
 840     if (thread_to_start) {
 841       (*thread_to_start).reset(new BrowserProcessSubThread(id));
 842       if (!(*thread_to_start)->StartWithOptions(options)) {
 843         LOG(FATAL) << "Failed to start the browser thread: id == " << id;
 844       }
 845     } else {
 846       NOTREACHED();
 847     }
 848
 849     TRACE_EVENT_END0("startup", "BrowserMainLoop::CreateThreads:start");
 850   }
 851   created_threads_ = true;
 852   return result_code_;
 853 }
 854
 855 int BrowserMainLoop::PreMainMessageLoopRun() {
 856   if (parts_) {
 857     TRACE_EVENT0("startup",
 858         "BrowserMainLoop::CreateThreads:PreMainMessageLoopRun");
 859     TRACK_SCOPED_REGION(
 860         "Startup", "BrowserMainLoop::PreMainMessageLoopRun");
 861
 862     parts_->PreMainMessageLoopRun();
 863   }
 864
 865   // If the UI thread blocks, the whole UI is unresponsive.
 866   // Do not allow disk IO from the UI thread.
 867   base::ThreadRestrictions::SetIOAllowed(false);
 868   base::ThreadRestrictions::DisallowWaiting();
 869   return result_code_;
 870 }
 871
 872 void BrowserMainLoop::RunMainMessageLoopParts() {
 873   TRACE_EVENT_BEGIN_ETW("BrowserMain:MESSAGE_LOOP", 0, "");
 874
 875   bool ran_main_loop = false;
 876   if (parts_)
 877     ran_main_loop = parts_->MainMessageLoopRun(&result_code_);
 878
 879   if (!ran_main_loop)
 880     MainMessageLoopRun();
 881
 882   TRACE_EVENT_END_ETW("BrowserMain:MESSAGE_LOOP", 0, "");
 883 }
 884
 885 void BrowserMainLoop::ShutdownThreadsAndCleanUp() {
 886   if (!created_threads_) {
 887     // Called early, nothing to do
 888     return;
 889   }
 890   TRACE_EVENT0("shutdown", "BrowserMainLoop::ShutdownThreadsAndCleanUp");
 891
 892   // Teardown may start in PostMainMessageLoopRun, and during teardown we
 893   // need to be able to perform IO.
 894   base::ThreadRestrictions::SetIOAllowed(true);
 895   BrowserThread::PostTask(
 896       BrowserThread::IO, FROM_HERE,
 897       base::Bind(base::IgnoreResult(&base::ThreadRestrictions::SetIOAllowed),
 898                  true));
 899
 900   mojo_shell_context_.reset();
 901
 902 #if !defined(OS_IOS)
 903   if (RenderProcessHost::run_renderer_in_process())
 904     RenderProcessHostImpl::ShutDownInProcessRenderer();
 905 #endif
 906
 907   if (parts_) {
 908     TRACE_EVENT0("shutdown",
 909                  "BrowserMainLoop::Subsystem:PostMainMessageLoopRun");
 910     parts_->PostMainMessageLoopRun();
 911   }
 912
 913   trace_memory_controller_.reset();
 914   system_stats_monitor_.reset();
 915
 916 #if !defined(OS_IOS)
 917   // Destroying the GpuProcessHostUIShims on the UI thread posts a task to
 918   // delete related objects on the GPU thread. This must be done before
 919   // stopping the GPU thread. The GPU thread will close IPC channels to renderer
 920   // processes so this has to happen before stopping the IO thread.
 921   {
 922     TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:GPUProcessHostShim");
 923     GpuProcessHostUIShim::DestroyAll();
 924   }
 925   // Cancel pending requests and prevent new requests.
 926   if (resource_dispatcher_host_) {
 927     TRACE_EVENT0("shutdown",
 928                  "BrowserMainLoop::Subsystem:ResourceDispatcherHost");
 929     resource_dispatcher_host_.get()->Shutdown();
 930   }
 931
 932   memory_pressure_monitor_.reset();
 933
 934 #if defined(OS_MACOSX)
 935   BrowserCompositorMac::DisableRecyclingForShutdown();
 936 #endif
 937
 938 #if defined(USE_AURA) || defined(OS_MACOSX)
 939   {
 940     TRACE_EVENT0("shutdown",
 941                  "BrowserMainLoop::Subsystem:ImageTransportFactory");
 942     ImageTransportFactory::Terminate();
 943   }
 944 #endif
 945
 946 #if defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
 947   ZygoteHostImpl::GetInstance()->TearDownAfterLastChild();
 948 #endif  // defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
 949
 950   // The device monitors are using |system_monitor_| as dependency, so delete
 951   // them before |system_monitor_| goes away.
 952   // On Mac and windows, the monitor needs to be destroyed on the same thread
 953   // as they were created. On Linux, the monitor will be deleted when IO thread
 954   // goes away.
 955 #if defined(OS_WIN)
 956   system_message_window_.reset();
 957 #elif defined(OS_MACOSX)
 958   device_monitor_mac_.reset();
 959 #endif
 960 #endif  // !defined(OS_IOS)
 961
 962   // Must be size_t so we can subtract from it.
 963   for (size_t thread_id = BrowserThread::ID_COUNT - 1;
 964        thread_id >= (BrowserThread::UI + 1);
 965        --thread_id) {
 966     // Find the thread object we want to stop. Looping over all valid
 967     // BrowserThread IDs and DCHECKing on a missing case in the switch
 968     // statement helps avoid a mismatch between this code and the
 969     // BrowserThread::ID enumeration.
 970     //
 971     // The destruction order is the reverse order of occurrence in the
 972     // BrowserThread::ID list. The rationale for the order is as
 973     // follows (need to be filled in a bit):
 974     //
 975     //
 976     // - The IO thread is the only user of the CACHE thread.
 977     //
 978     // - The PROCESS_LAUNCHER thread must be stopped after IO in case
 979     //   the IO thread posted a task to terminate a process on the
 980     //   process launcher thread.
 981     //
 982     // - (Not sure why DB stops last.)
 983     switch (thread_id) {
 984       case BrowserThread::DB: {
 985         TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:DBThread");
 986         ResetThread_DB(db_thread_.Pass());
 987         break;
 988       }
 989       case BrowserThread::FILE: {
 990         TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:FileThread");
 991 #if !defined(OS_IOS)
 992         // Clean up state that lives on or uses the file_thread_ before
 993         // it goes away.
 994         if (resource_dispatcher_host_)
 995           resource_dispatcher_host_.get()->save_file_manager()->Shutdown();
 996 #endif  // !defined(OS_IOS)
 997         ResetThread_FILE(file_thread_.Pass());
 998         break;
 999       }
1000       case BrowserThread::FILE_USER_BLOCKING: {
1001         TRACE_EVENT0("shutdown",
1002                       "BrowserMainLoop::Subsystem:FileUserBlockingThread");
1003         ResetThread_FILE_USER_BLOCKING(file_user_blocking_thread_.Pass());
1004         break;
1005       }
1006       case BrowserThread::PROCESS_LAUNCHER: {
1007         TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:LauncherThread");
1008         ResetThread_PROCESS_LAUNCHER(process_launcher_thread_.Pass());
1009         break;
1010       }
1011       case BrowserThread::CACHE: {
1012         TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:CacheThread");
1013         ResetThread_CACHE(cache_thread_.Pass());
1014         break;
1015       }
1016       case BrowserThread::IO: {
1017         TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:IOThread");
1018         ResetThread_IO(io_thread_.Pass());
1019         break;
1020       }
1021       case BrowserThread::UI:
1022       case BrowserThread::ID_COUNT:
1023       default:
1024         NOTREACHED();
1025         break;
1026     }
1027   }
1028
1029 #if !defined(OS_IOS)
1030   {
1031     TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:IndexedDBThread");
1032     ResetThread_IndexedDb(indexed_db_thread_.Pass());
1033   }
1034 #endif
1035
1036   // Close the blocking I/O pool after the other threads. Other threads such
1037   // as the I/O thread may need to schedule work like closing files or flushing
1038   // data during shutdown, so the blocking pool needs to be available. There
1039   // may also be slow operations pending that will blcok shutdown, so closing
1040   // it here (which will block until required operations are complete) gives
1041   // more head start for those operations to finish.
1042   {
1043     TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:ThreadPool");
1044     BrowserThreadImpl::ShutdownThreadPool();
1045   }
1046
1047 #if !defined(OS_IOS)
1048   // Must happen after the IO thread is shutdown since this may be accessed from
1049   // it.
1050   {
1051     TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:GPUChannelFactory");
1052     if (BrowserGpuChannelHostFactory::instance())
1053       BrowserGpuChannelHostFactory::Terminate();
1054   }
1055
1056   // Must happen after the I/O thread is shutdown since this class lives on the
1057   // I/O thread and isn't threadsafe.
1058   {
1059     TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:GamepadService");
1060     GamepadService::GetInstance()->Terminate();
1061   }
1062   {
1063     TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:SensorService");
1064     DeviceInertialSensorService::GetInstance()->Shutdown();
1065   }
1066   {
1067     TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:BatteryStatusService");
1068     device::BatteryStatusService::GetInstance()->Shutdown();
1069   }
1070   {
1071     TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:DeleteDataSources");
1072     URLDataManager::DeleteDataSources();
1073   }
1074 #endif  // !defined(OS_IOS)
1075
1076   if (parts_) {
1077     TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:PostDestroyThreads");
1078     parts_->PostDestroyThreads();
1079   }
1080 }
1081
1082 void BrowserMainLoop::StopStartupTracingTimer() {
1083   startup_trace_timer_.Stop();
1084 }
1085
1086 void BrowserMainLoop::InitializeMainThread() {
1087   TRACE_EVENT0("startup", "BrowserMainLoop::InitializeMainThread");
1088   static const char kThreadName[] = "CrBrowserMain";
1089   base::PlatformThread::SetName(kThreadName);
1090   if (main_message_loop_)
1091     main_message_loop_->set_thread_name(kThreadName);
1092
1093   // Register the main thread by instantiating it, but don't call any methods.
1094   main_thread_.reset(
1095       new BrowserThreadImpl(BrowserThread::UI, base::MessageLoop::current()));
1096 }
1097
1098 int BrowserMainLoop::BrowserThreadsStarted() {
1099   TRACE_EVENT0("startup", "BrowserMainLoop::BrowserThreadsStarted");
1100
1101 #if !defined(OS_IOS)
1102   indexed_db_thread_.reset(new base::Thread("IndexedDB"));
1103   indexed_db_thread_->Start();
1104 #endif
1105
1106 #if !defined(OS_IOS)
1107   HistogramSynchronizer::GetInstance();
1108
1109 #if defined(OS_ANDROID)
1110   // Up the priority of the UI thread.
1111   base::PlatformThread::SetCurrentThreadPriority(base::ThreadPriority::DISPLAY);
1112 #endif
1113
1114   bool always_uses_gpu = true;
1115   bool established_gpu_channel = false;
1116 #if defined(OS_ANDROID)
1117   // TODO(crbug.com/439322): This should be set to |true|.
1118   established_gpu_channel = false;
1119   BrowserGpuChannelHostFactory::Initialize(established_gpu_channel);
1120 #elif defined(USE_AURA) || defined(OS_MACOSX)
1121   established_gpu_channel = true;
1122   if (!GpuDataManagerImpl::GetInstance()->CanUseGpuBrowserCompositor() ||
1123       parsed_command_line_.HasSwitch(switches::kDisableGpuEarlyInit)) {
1124     established_gpu_channel = always_uses_gpu = false;
1125   }
1126   BrowserGpuChannelHostFactory::Initialize(established_gpu_channel);
1127   ImageTransportFactory::Initialize();
1128 #if defined(USE_AURA)
1129   if (aura::Env::GetInstance()) {
1130     aura::Env::GetInstance()->set_context_factory(GetContextFactory());
1131   }
1132 #endif  // defined(USE_AURA)
1133 #endif  // defined(OS_ANDROID)
1134
1135   // Enable the GpuMemoryBuffer dump provider with IO thread affinity. Note that
1136   // unregistration happens on the IO thread (See
1137   // BrowserProcessSubThread::IOThreadPreCleanUp).
1138   base::trace_event::MemoryDumpManager::GetInstance()->RegisterDumpProvider(
1139       BrowserGpuMemoryBufferManager::current(), io_thread_->task_runner());
1140
1141   {
1142     TRACE_EVENT0("startup", "BrowserThreadsStarted::Subsystem:AudioMan");
1143     audio_manager_.reset(media::AudioManager::CreateWithHangTimer(
1144         MediaInternals::GetInstance(), io_thread_->task_runner()));
1145   }
1146
1147   {
1148     TRACE_EVENT0("startup", "BrowserThreadsStarted::Subsystem:MidiManager");
1149     midi_manager_.reset(media::midi::MidiManager::Create());
1150   }
1151
1152 #if defined(OS_LINUX) && defined(USE_UDEV)
1153   device_monitor_linux_.reset(new DeviceMonitorLinux());
1154 #elif defined(OS_MACOSX)
1155   device_monitor_mac_.reset(new DeviceMonitorMac());
1156 #endif
1157
1158 #if defined(OS_WIN)
1159   UMA_HISTOGRAM_BOOLEAN("Windows.Win32kRendererLockdown",
1160                         IsWin32kRendererLockdownEnabled());
1161 #endif
1162   // RDH needs the IO thread to be created
1163   {
1164     TRACE_EVENT0("startup",
1165       "BrowserMainLoop::BrowserThreadsStarted:InitResourceDispatcherHost");
1166     resource_dispatcher_host_.reset(new ResourceDispatcherHostImpl());
1167   }
1168
1169   // MediaStreamManager needs the IO thread to be created.
1170   {
1171     TRACE_EVENT0("startup",
1172       "BrowserMainLoop::BrowserThreadsStarted:InitMediaStreamManager");
1173     media_stream_manager_.reset(new MediaStreamManager(audio_manager_.get()));
1174   }
1175
1176   {
1177     TRACE_EVENT0("startup",
1178       "BrowserMainLoop::BrowserThreadsStarted:InitSpeechRecognition");
1179     speech_recognition_manager_.reset(new SpeechRecognitionManagerImpl(
1180         audio_manager_.get(), media_stream_manager_.get()));
1181   }
1182
1183   {
1184     TRACE_EVENT0(
1185         "startup",
1186         "BrowserMainLoop::BrowserThreadsStarted::InitUserInputMonitor");
1187     user_input_monitor_ = media::UserInputMonitor::Create(
1188         io_thread_->task_runner(), main_thread_->task_runner());
1189   }
1190
1191   {
1192     TRACE_EVENT0("startup",
1193                  "BrowserMainLoop::BrowserThreadsStarted::TimeZoneMonitor");
1194     time_zone_monitor_ = TimeZoneMonitor::Create();
1195   }
1196
1197   // Alert the clipboard class to which threads are allowed to access the
1198   // clipboard:
1199   std::vector<base::PlatformThreadId> allowed_clipboard_threads;
1200   // The current thread is the UI thread.
1201   allowed_clipboard_threads.push_back(base::PlatformThread::CurrentId());
1202 #if defined(OS_WIN)
1203   // On Windows, clipboards are also used on the FILE or IO threads.
1204   allowed_clipboard_threads.push_back(file_thread_->thread_id());
1205   allowed_clipboard_threads.push_back(io_thread_->thread_id());
1206 #endif
1207   ui::Clipboard::SetAllowedThreads(allowed_clipboard_threads);
1208
1209   // When running the GPU thread in-process, avoid optimistically starting it
1210   // since creating the GPU thread races against creation of the one-and-only
1211   // ChildProcess instance which is created by the renderer thread.
1212   if (GpuDataManagerImpl::GetInstance()->GpuAccessAllowed(NULL) &&
1213       !established_gpu_channel &&
1214       always_uses_gpu &&
1215       !UsingInProcessGpu()) {
1216     TRACE_EVENT_INSTANT0("gpu", "Post task to launch GPU process",
1217                          TRACE_EVENT_SCOPE_THREAD);
1218     BrowserThread::PostTask(
1219         BrowserThread::IO, FROM_HERE,
1220         base::Bind(base::IgnoreResult(&GpuProcessHost::Get),
1221                    GpuProcessHost::GPU_PROCESS_KIND_SANDBOXED,
1222                    CAUSE_FOR_GPU_LAUNCH_BROWSER_STARTUP));
1223   }
1224
1225 #if defined(OS_MACOSX)
1226   ThemeHelperMac::GetInstance();
1227   SystemHotkeyHelperMac::GetInstance()->DeferredLoadSystemHotkeys();
1228   if (ShouldEnableBootstrapSandbox()) {
1229     TRACE_EVENT0("startup",
1230                  "BrowserMainLoop::BrowserThreadsStarted:BootstrapSandbox");
1231     CHECK(GetBootstrapSandbox());
1232   }
1233 #endif  // defined(OS_MACOSX)
1234
1235 #endif  // !defined(OS_IOS)
1236
1237   mojo_shell_context_.reset(new MojoShellContext);
1238
1239   return result_code_;
1240 }
1241
1242 bool BrowserMainLoop::UsingInProcessGpu() const {
1243   return parsed_command_line_.HasSwitch(switches::kSingleProcess) ||
1244          parsed_command_line_.HasSwitch(switches::kInProcessGPU);
1245 }
1246
1247 bool BrowserMainLoop::InitializeToolkit() {
1248   TRACE_EVENT0("startup", "BrowserMainLoop::InitializeToolkit");
1249   TRACK_SCOPED_REGION("Startup", "BrowserMainLoop::InitializeToolkit");
1250
1251   // TODO(evan): this function is rather subtle, due to the variety
1252   // of intersecting ifdefs we have.  To keep it easy to follow, there
1253   // are no #else branches on any #ifs.
1254   // TODO(stevenjb): Move platform specific code into platform specific Parts
1255   // (Need to add InitializeToolkit stage to BrowserParts).
1256   // See also GTK setup in EarlyInitialization, above, and associated comments.
1257
1258 #if defined(OS_WIN)
1259   // Init common control sex.
1260   INITCOMMONCONTROLSEX config;
1261   config.dwSize = sizeof(config);
1262   config.dwICC = ICC_WIN95_CLASSES;
1263   if (!InitCommonControlsEx(&config))
1264     PLOG(FATAL);
1265 #endif
1266
1267 #if defined(USE_AURA)
1268
1269 #if defined(USE_X11)
1270   if (!gfx::GetXDisplay())
1271     return false;
1272 #endif
1273
1274   // Env creates the compositor. Aura widgets need the compositor to be created
1275   // before they can be initialized by the browser.
1276   aura::Env::CreateInstance(true);
1277 #endif  // defined(USE_AURA)
1278
1279   if (parts_)
1280     parts_->ToolkitInitialized();
1281
1282   return true;
1283 }
1284
1285 void BrowserMainLoop::MainMessageLoopRun() {
1286 #if defined(OS_ANDROID)
1287   // Android's main message loop is the Java message loop.
1288   NOTREACHED();
1289 #else
1290   DCHECK(base::MessageLoopForUI::IsCurrent());
1291   if (parameters_.ui_task) {
1292     base::ThreadTaskRunnerHandle::Get()->PostTask(FROM_HERE,
1293                                                   *parameters_.ui_task);
1294   }
1295
1296   base::RunLoop run_loop;
1297   run_loop.Run();
1298 #endif
1299 }
1300
1301 base::FilePath BrowserMainLoop::GetStartupTraceFileName(
1302     const base::CommandLine& command_line) const {
1303   base::FilePath trace_file = command_line.GetSwitchValuePath(
1304       switches::kTraceStartupFile);
1305   // trace_file = "none" means that startup events will show up for the next
1306   // begin/end tracing (via about:tracing or AutomationProxy::BeginTracing/
1307   // EndTracing, for example).
1308   if (trace_file == base::FilePath().AppendASCII("none"))
1309     return trace_file;
1310
1311   if (trace_file.empty()) {
1312 #if defined(OS_ANDROID)
1313     TracingControllerAndroid::GenerateTracingFilePath(&trace_file);
1314 #else
1315     // Default to saving the startup trace into the current dir.
1316     trace_file = base::FilePath().AppendASCII("chrometrace.log");
1317 #endif
1318   }
1319
1320   return trace_file;
1321 }
1322
1323 void BrowserMainLoop::InitStartupTracing(
1324     const base::CommandLine& command_line) {
1325   DCHECK(is_tracing_startup_);
1326
1327   startup_trace_file_ = GetStartupTraceFileName(parsed_command_line_);
1328
1329   std::string delay_str = command_line.GetSwitchValueASCII(
1330       switches::kTraceStartupDuration);
1331   int delay_secs = 5;
1332   if (!delay_str.empty() && !base::StringToInt(delay_str, &delay_secs)) {
1333     DLOG(WARNING) << "Could not parse --" << switches::kTraceStartupDuration
1334         << "=" << delay_str << " defaulting to 5 (secs)";
1335     delay_secs = 5;
1336   }
1337
1338   startup_trace_timer_.Start(FROM_HERE,
1339                              base::TimeDelta::FromSeconds(delay_secs),
1340                              this,
1341                              &BrowserMainLoop::EndStartupTracing);
1342 }
1343
1344 void BrowserMainLoop::EndStartupTracing() {
1345   DCHECK(is_tracing_startup_);
1346
1347   is_tracing_startup_ = false;
1348   TracingController::GetInstance()->DisableRecording(
1349       TracingController::CreateFileSink(
1350           startup_trace_file_,
1351           base::Bind(OnStoppedStartupTracing, startup_trace_file_)));
1352 }
1353
1354 }  // namespace content