render_thread_impl.cc revision f8ee788a64d60abd8f2d742a5fdedde054ecd910 
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/renderer/render_thread_impl.h"
6
7#include <algorithm>
8#include <limits>
9#include <map>
10#include <vector>
11
12#include "base/allocator/allocator_extension.h"
13#include "base/command_line.h"
14#include "base/debug/trace_event.h"
15#include "base/lazy_instance.h"
16#include "base/logging.h"
17#include "base/memory/discardable_memory.h"
18#include "base/memory/shared_memory.h"
19#include "base/metrics/field_trial.h"
20#include "base/metrics/histogram.h"
21#include "base/metrics/stats_table.h"
22#include "base/path_service.h"
23#include "base/strings/string16.h"
24#include "base/strings/string_number_conversions.h"
25#include "base/strings/string_tokenizer.h"
26#include "base/strings/utf_string_conversions.h"
27#include "base/threading/thread_local.h"
28#include "base/threading/thread_restrictions.h"
29#include "base/values.h"
30#include "cc/base/switches.h"
31#include "cc/resources/raster_worker_pool.h"
32#include "content/child/appcache/appcache_dispatcher.h"
33#include "content/child/appcache/appcache_frontend_impl.h"
34#include "content/child/child_histogram_message_filter.h"
35#include "content/child/db_message_filter.h"
36#include "content/child/indexed_db/indexed_db_dispatcher.h"
37#include "content/child/indexed_db/indexed_db_message_filter.h"
38#include "content/child/npapi/npobject_util.h"
39#include "content/child/plugin_messages.h"
40#include "content/child/resource_dispatcher.h"
41#include "content/child/runtime_features.h"
42#include "content/child/thread_safe_sender.h"
43#include "content/child/web_database_observer_impl.h"
44#include "content/child/worker_task_runner.h"
45#include "content/common/child_process_messages.h"
46#include "content/common/content_constants_internal.h"
47#include "content/common/database_messages.h"
48#include "content/common/dom_storage/dom_storage_messages.h"
49#include "content/common/gpu/client/context_provider_command_buffer.h"
50#include "content/common/gpu/client/gpu_channel_host.h"
51#include "content/common/gpu/client/gpu_memory_buffer_impl.h"
52#include "content/common/gpu/gpu_messages.h"
53#include "content/common/gpu/gpu_process_launch_causes.h"
54#include "content/common/mojo/mojo_service_names.h"
55#include "content/common/resource_messages.h"
56#include "content/common/view_messages.h"
57#include "content/common/worker_messages.h"
58#include "content/public/common/content_constants.h"
59#include "content/public/common/content_paths.h"
60#include "content/public/common/content_switches.h"
61#include "content/public/common/renderer_preferences.h"
62#include "content/public/common/url_constants.h"
63#include "content/public/renderer/content_renderer_client.h"
64#include "content/public/renderer/render_process_observer.h"
65#include "content/public/renderer/render_view_visitor.h"
66#include "content/renderer/compositor_bindings/web_external_bitmap_impl.h"
67#include "content/renderer/compositor_bindings/web_layer_impl.h"
68#include "content/renderer/devtools/devtools_agent_filter.h"
69#include "content/renderer/dom_storage/dom_storage_dispatcher.h"
70#include "content/renderer/dom_storage/webstoragearea_impl.h"
71#include "content/renderer/dom_storage/webstoragenamespace_impl.h"
72#include "content/renderer/gamepad_shared_memory_reader.h"
73#include "content/renderer/gpu/compositor_output_surface.h"
74#include "content/renderer/gpu/gpu_benchmarking_extension.h"
75#include "content/renderer/input/input_event_filter.h"
76#include "content/renderer/input/input_handler_manager.h"
77#include "content/renderer/media/aec_dump_message_filter.h"
78#include "content/renderer/media/audio_input_message_filter.h"
79#include "content/renderer/media/audio_message_filter.h"
80#include "content/renderer/media/audio_renderer_mixer_manager.h"
81#include "content/renderer/media/media_stream_center.h"
82#include "content/renderer/media/midi_message_filter.h"
83#include "content/renderer/media/peer_connection_tracker.h"
84#include "content/renderer/media/renderer_gpu_video_accelerator_factories.h"
85#include "content/renderer/media/rtc_peer_connection_handler.h"
86#include "content/renderer/media/video_capture_impl_manager.h"
87#include "content/renderer/media/video_capture_message_filter.h"
88#include "content/renderer/media/webrtc/peer_connection_dependency_factory.h"
89#include "content/renderer/media/webrtc_identity_service.h"
90#include "content/renderer/net_info_helper.h"
91#include "content/renderer/p2p/socket_dispatcher.h"
92#include "content/renderer/render_process_impl.h"
93#include "content/renderer/render_view_impl.h"
94#include "content/renderer/renderer_webkitplatformsupport_impl.h"
95#include "content/renderer/service_worker/embedded_worker_context_message_filter.h"
96#include "content/renderer/service_worker/embedded_worker_dispatcher.h"
97#include "content/renderer/shared_worker/embedded_shared_worker_stub.h"
98#include "content/renderer/web_ui_setup_impl.h"
99#include "grit/content_resources.h"
100#include "ipc/ipc_channel_handle.h"
101#include "ipc/ipc_forwarding_message_filter.h"
102#include "ipc/ipc_platform_file.h"
103#include "media/base/audio_hardware_config.h"
104#include "media/base/media.h"
105#include "media/filters/gpu_video_accelerator_factories.h"
106#include "mojo/common/common_type_converters.h"
107#include "net/base/net_errors.h"
108#include "net/base/net_util.h"
109#include "skia/ext/event_tracer_impl.h"
110#include "third_party/WebKit/public/platform/WebString.h"
111#include "third_party/WebKit/public/web/WebColorName.h"
112#include "third_party/WebKit/public/web/WebDatabase.h"
113#include "third_party/WebKit/public/web/WebDocument.h"
114#include "third_party/WebKit/public/web/WebFrame.h"
115#include "third_party/WebKit/public/web/WebImageCache.h"
116#include "third_party/WebKit/public/web/WebKit.h"
117#include "third_party/WebKit/public/web/WebNetworkStateNotifier.h"
118#include "third_party/WebKit/public/web/WebPopupMenu.h"
119#include "third_party/WebKit/public/web/WebRuntimeFeatures.h"
120#include "third_party/WebKit/public/web/WebScriptController.h"
121#include "third_party/WebKit/public/web/WebSecurityPolicy.h"
122#include "third_party/WebKit/public/web/WebView.h"
123#include "third_party/skia/include/core/SkGraphics.h"
124#include "ui/base/layout.h"
125#include "ui/base/ui_base_switches.h"
126#include "v8/include/v8.h"
127
128#if defined(OS_ANDROID)
129#include <cpu-features.h>
130#include "content/renderer/android/synchronous_compositor_factory.h"
131#include "content/renderer/media/android/renderer_demuxer_android.h"
132#endif
133
134#if defined(OS_MACOSX)
135#include "content/renderer/webscrollbarbehavior_impl_mac.h"
136#endif
137
138#if defined(OS_POSIX)
139#include "ipc/ipc_channel_posix.h"
140#endif
141
142#if defined(OS_WIN)
143#include <windows.h>
144#include <objbase.h>
145#else
146// TODO(port)
147#include "content/child/npapi/np_channel_base.h"
148#endif
149
150#if defined(ENABLE_PLUGINS)
151#include "content/renderer/npapi/plugin_channel_host.h"
152#endif
153
154using base::ThreadRestrictions;
155using blink::WebDocument;
156using blink::WebFrame;
157using blink::WebNetworkStateNotifier;
158using blink::WebRuntimeFeatures;
159using blink::WebScriptController;
160using blink::WebSecurityPolicy;
161using blink::WebString;
162using blink::WebView;
163
164namespace content {
165
166namespace {
167
168const int64 kInitialIdleHandlerDelayMs = 1000;
169const int64 kShortIdleHandlerDelayMs = 1000;
170const int64 kLongIdleHandlerDelayMs = 30*1000;
171const int kIdleCPUUsageThresholdInPercents = 3;
172const int kMinRasterThreads = 1;
173const int kMaxRasterThreads = 64;
174
175// Keep the global RenderThreadImpl in a TLS slot so it is impossible to access
176// incorrectly from the wrong thread.
177base::LazyInstance<base::ThreadLocalPointer<RenderThreadImpl> >
178    lazy_tls = LAZY_INSTANCE_INITIALIZER;
179
180class RenderViewZoomer : public RenderViewVisitor {
181 public:
182  RenderViewZoomer(const std::string& scheme,
183                   const std::string& host,
184                   double zoom_level) : scheme_(scheme),
185                                        host_(host),
186                                        zoom_level_(zoom_level) {
187  }
188
189  virtual bool Visit(RenderView* render_view) OVERRIDE {
190    WebView* webview = render_view->GetWebView();
191    WebDocument document = webview->mainFrame()->document();
192
193    // Don't set zoom level for full-page plugin since they don't use the same
194    // zoom settings.
195    if (document.isPluginDocument())
196      return true;
197    GURL url(document.url());
198    // Empty scheme works as wildcard that matches any scheme,
199    if ((net::GetHostOrSpecFromURL(url) == host_) &&
200        (scheme_.empty() || scheme_ == url.scheme()) &&
201        !static_cast<RenderViewImpl*>(render_view)
202             ->uses_temporary_zoom_level()) {
203      webview->hidePopups();
204      webview->setZoomLevel(zoom_level_);
205    }
206    return true;
207  }
208
209 private:
210  const std::string scheme_;
211  const std::string host_;
212  const double zoom_level_;
213
214  DISALLOW_COPY_AND_ASSIGN(RenderViewZoomer);
215};
216
217std::string HostToCustomHistogramSuffix(const std::string& host) {
218  if (host == "mail.google.com")
219    return ".gmail";
220  if (host == "docs.google.com" || host == "drive.google.com")
221    return ".docs";
222  if (host == "plus.google.com")
223    return ".plus";
224  return std::string();
225}
226
227void* CreateHistogram(
228    const char *name, int min, int max, size_t buckets) {
229  if (min <= 0)
230    min = 1;
231  std::string histogram_name;
232  RenderThreadImpl* render_thread_impl = RenderThreadImpl::current();
233  if (render_thread_impl) {  // Can be null in tests.
234    histogram_name = render_thread_impl->
235        histogram_customizer()->ConvertToCustomHistogramName(name);
236  } else {
237    histogram_name = std::string(name);
238  }
239  base::HistogramBase* histogram = base::Histogram::FactoryGet(
240      histogram_name, min, max, buckets,
241      base::Histogram::kUmaTargetedHistogramFlag);
242  return histogram;
243}
244
245void AddHistogramSample(void* hist, int sample) {
246  base::Histogram* histogram = static_cast<base::Histogram*>(hist);
247  histogram->Add(sample);
248}
249
250scoped_ptr<base::SharedMemory> AllocateSharedMemoryFunction(size_t size) {
251  return RenderThreadImpl::Get()->HostAllocateSharedMemoryBuffer(size);
252}
253
254void EnableBlinkPlatformLogChannels(const std::string& channels) {
255  if (channels.empty())
256    return;
257  base::StringTokenizer t(channels, ", ");
258  while (t.GetNext())
259    blink::enableLogChannel(t.token().c_str());
260}
261
262void NotifyTimezoneChangeOnThisThread() {
263  v8::Isolate* isolate = v8::Isolate::GetCurrent();
264  if (!isolate)
265    return;
266  v8::Date::DateTimeConfigurationChangeNotification(isolate);
267}
268
269}  // namespace
270
271RenderThreadImpl::HistogramCustomizer::HistogramCustomizer() {
272  custom_histograms_.insert("V8.MemoryExternalFragmentationTotal");
273  custom_histograms_.insert("V8.MemoryHeapSampleTotalCommitted");
274  custom_histograms_.insert("V8.MemoryHeapSampleTotalUsed");
275}
276
277RenderThreadImpl::HistogramCustomizer::~HistogramCustomizer() {}
278
279void RenderThreadImpl::HistogramCustomizer::RenderViewNavigatedToHost(
280    const std::string& host, size_t view_count) {
281  if (CommandLine::ForCurrentProcess()->HasSwitch(
282      switches::kDisableHistogramCustomizer)) {
283    return;
284  }
285  // Check if all RenderViews are displaying a page from the same host. If there
286  // is only one RenderView, the common host is this view's host. If there are
287  // many, check if this one shares the common host of the other
288  // RenderViews. It's ok to not detect some cases where the RenderViews share a
289  // common host. This information is only used for producing custom histograms.
290  if (view_count == 1)
291    SetCommonHost(host);
292  else if (host != common_host_)
293    SetCommonHost(std::string());
294}
295
296std::string RenderThreadImpl::HistogramCustomizer::ConvertToCustomHistogramName(
297    const char* histogram_name) const {
298  std::string name(histogram_name);
299  if (!common_host_histogram_suffix_.empty() &&
300      custom_histograms_.find(name) != custom_histograms_.end())
301    name += common_host_histogram_suffix_;
302  return name;
303}
304
305void RenderThreadImpl::HistogramCustomizer::SetCommonHost(
306    const std::string& host) {
307  if (host != common_host_) {
308    common_host_ = host;
309    common_host_histogram_suffix_ = HostToCustomHistogramSuffix(host);
310    v8::V8::SetCreateHistogramFunction(CreateHistogram);
311  }
312}
313
314RenderThreadImpl* RenderThreadImpl::current() {
315  return lazy_tls.Pointer()->Get();
316}
317
318// When we run plugins in process, we actually run them on the render thread,
319// which means that we need to make the render thread pump UI events.
320RenderThreadImpl::RenderThreadImpl() {
321  Init();
322}
323
324RenderThreadImpl::RenderThreadImpl(const std::string& channel_name)
325    : ChildThread(channel_name) {
326  Init();
327}
328
329void RenderThreadImpl::Init() {
330  TRACE_EVENT_BEGIN_ETW("RenderThreadImpl::Init", 0, "");
331
332  base::debug::TraceLog::GetInstance()->SetThreadSortIndex(
333      base::PlatformThread::CurrentId(),
334      kTraceEventRendererMainThreadSortIndex);
335
336  v8::V8::SetCounterFunction(base::StatsTable::FindLocation);
337  v8::V8::SetCreateHistogramFunction(CreateHistogram);
338  v8::V8::SetAddHistogramSampleFunction(AddHistogramSample);
339
340#if defined(OS_MACOSX) || defined(OS_ANDROID)
341  // On Mac and Android, the select popups are rendered by the browser.
342  blink::WebView::setUseExternalPopupMenus(true);
343#endif
344
345  lazy_tls.Pointer()->Set(this);
346
347  // Register this object as the main thread.
348  ChildProcess::current()->set_main_thread(this);
349
350  // In single process the single process is all there is.
351  suspend_webkit_shared_timer_ = true;
352  notify_webkit_of_modal_loop_ = true;
353  webkit_shared_timer_suspended_ = false;
354  widget_count_ = 0;
355  hidden_widget_count_ = 0;
356  idle_notification_delay_in_ms_ = kInitialIdleHandlerDelayMs;
357  idle_notifications_to_skip_ = 0;
358  layout_test_mode_ = false;
359
360  appcache_dispatcher_.reset(
361      new AppCacheDispatcher(Get(), new AppCacheFrontendImpl()));
362  dom_storage_dispatcher_.reset(new DomStorageDispatcher());
363  main_thread_indexed_db_dispatcher_.reset(new IndexedDBDispatcher(
364      thread_safe_sender()));
365  embedded_worker_dispatcher_.reset(new EmbeddedWorkerDispatcher());
366
367  media_stream_center_ = NULL;
368
369  db_message_filter_ = new DBMessageFilter();
370  AddFilter(db_message_filter_.get());
371
372  vc_manager_.reset(new VideoCaptureImplManager());
373  AddFilter(vc_manager_->video_capture_message_filter());
374
375#if defined(ENABLE_WEBRTC)
376  peer_connection_tracker_.reset(new PeerConnectionTracker());
377  AddObserver(peer_connection_tracker_.get());
378
379  p2p_socket_dispatcher_ =
380      new P2PSocketDispatcher(GetIOMessageLoopProxy().get());
381  AddFilter(p2p_socket_dispatcher_.get());
382
383  webrtc_identity_service_.reset(new WebRTCIdentityService());
384
385  aec_dump_message_filter_ =
386      new AecDumpMessageFilter(GetIOMessageLoopProxy(),
387                               message_loop()->message_loop_proxy());
388  AddFilter(aec_dump_message_filter_.get());
389
390  peer_connection_factory_.reset(new PeerConnectionDependencyFactory(
391      p2p_socket_dispatcher_.get()));
392#endif  // defined(ENABLE_WEBRTC)
393
394  audio_input_message_filter_ =
395      new AudioInputMessageFilter(GetIOMessageLoopProxy());
396  AddFilter(audio_input_message_filter_.get());
397
398  audio_message_filter_ = new AudioMessageFilter(GetIOMessageLoopProxy());
399  AddFilter(audio_message_filter_.get());
400
401  midi_message_filter_ = new MidiMessageFilter(GetIOMessageLoopProxy());
402  AddFilter(midi_message_filter_.get());
403
404  AddFilter((new IndexedDBMessageFilter(thread_safe_sender()))->GetFilter());
405
406  AddFilter((new EmbeddedWorkerContextMessageFilter())->GetFilter());
407
408  gamepad_shared_memory_reader_.reset(new GamepadSharedMemoryReader());
409  AddObserver(gamepad_shared_memory_reader_.get());
410
411  GetContentClient()->renderer()->RenderThreadStarted();
412
413  InitSkiaEventTracer();
414
415  const CommandLine& command_line = *CommandLine::ForCurrentProcess();
416  if (command_line.HasSwitch(cc::switches::kEnableGpuBenchmarking))
417      RegisterExtension(GpuBenchmarkingExtension::Get());
418
419  is_impl_side_painting_enabled_ =
420      command_line.HasSwitch(switches::kEnableImplSidePainting);
421  WebLayerImpl::SetImplSidePaintingEnabled(is_impl_side_painting_enabled_);
422
423  is_zero_copy_enabled_ = command_line.HasSwitch(switches::kEnableZeroCopy) &&
424                          !command_line.HasSwitch(switches::kDisableZeroCopy);
425
426  is_one_copy_enabled_ = command_line.HasSwitch(switches::kEnableOneCopy);
427
428  if (command_line.HasSwitch(switches::kDisableLCDText)) {
429    is_lcd_text_enabled_ = false;
430  } else if (command_line.HasSwitch(switches::kEnableLCDText)) {
431    is_lcd_text_enabled_ = true;
432  } else {
433#if defined(OS_ANDROID)
434    is_lcd_text_enabled_ = false;
435#else
436    is_lcd_text_enabled_ = true;
437#endif
438  }
439
440  is_gpu_rasterization_enabled_ =
441      command_line.HasSwitch(switches::kEnableGpuRasterization);
442  is_gpu_rasterization_forced_ =
443      command_line.HasSwitch(switches::kForceGpuRasterization);
444
445  if (command_line.HasSwitch(switches::kDisableDistanceFieldText)) {
446    is_distance_field_text_enabled_ = false;
447  } else if (command_line.HasSwitch(switches::kEnableDistanceFieldText)) {
448    is_distance_field_text_enabled_ = true;
449  } else {
450    is_distance_field_text_enabled_ = false;
451  }
452
453  is_low_res_tiling_enabled_ = true;
454  if (command_line.HasSwitch(switches::kDisableLowResTiling) &&
455      !command_line.HasSwitch(switches::kEnableLowResTiling)) {
456    is_low_res_tiling_enabled_ = false;
457  }
458
459  // Note that under Linux, the media library will normally already have
460  // been initialized by the Zygote before this instance became a Renderer.
461  base::FilePath media_path;
462  PathService::Get(DIR_MEDIA_LIBS, &media_path);
463  if (!media_path.empty())
464    media::InitializeMediaLibrary(media_path);
465
466  memory_pressure_listener_.reset(new base::MemoryPressureListener(
467      base::Bind(&RenderThreadImpl::OnMemoryPressure, base::Unretained(this))));
468
469  std::vector<base::DiscardableMemoryType> supported_types;
470  base::DiscardableMemory::GetSupportedTypes(&supported_types);
471  DCHECK(!supported_types.empty());
472
473  // The default preferred type is always the first one in list.
474  base::DiscardableMemoryType type = supported_types[0];
475
476  if (command_line.HasSwitch(switches::kUseDiscardableMemory)) {
477    std::string requested_type_name = command_line.GetSwitchValueASCII(
478        switches::kUseDiscardableMemory);
479    base::DiscardableMemoryType requested_type =
480        base::DiscardableMemory::GetNamedType(requested_type_name);
481    if (std::find(supported_types.begin(),
482                  supported_types.end(),
483                  requested_type) != supported_types.end()) {
484      type = requested_type;
485    } else {
486      LOG(ERROR) << "Requested discardable memory type is not supported.";
487    }
488  }
489
490  base::DiscardableMemory::SetPreferredType(type);
491
492  // Allow discardable memory implementations to register memory pressure
493  // listeners.
494  base::DiscardableMemory::RegisterMemoryPressureListeners();
495
496  // AllocateGpuMemoryBuffer must be used exclusively on one thread but
497  // it doesn't have to be the same thread RenderThreadImpl is created on.
498  allocate_gpu_memory_buffer_thread_checker_.DetachFromThread();
499
500  if (command_line.HasSwitch(switches::kNumRasterThreads)) {
501    int num_raster_threads;
502    std::string string_value =
503        command_line.GetSwitchValueASCII(switches::kNumRasterThreads);
504    if (base::StringToInt(string_value, &num_raster_threads) &&
505        num_raster_threads >= kMinRasterThreads &&
506        num_raster_threads <= kMaxRasterThreads) {
507      cc::RasterWorkerPool::SetNumRasterThreads(num_raster_threads);
508    } else {
509      LOG(WARNING) << "Failed to parse switch " <<
510                      switches::kNumRasterThreads  << ": " << string_value;
511    }
512  }
513
514  TRACE_EVENT_END_ETW("RenderThreadImpl::Init", 0, "");
515}
516
517RenderThreadImpl::~RenderThreadImpl() {
518}
519
520void RenderThreadImpl::Shutdown() {
521  FOR_EACH_OBSERVER(
522      RenderProcessObserver, observers_, OnRenderProcessShutdown());
523
524  ChildThread::Shutdown();
525
526  // Wait for all databases to be closed.
527  if (webkit_platform_support_) {
528    webkit_platform_support_->web_database_observer_impl()->
529        WaitForAllDatabasesToClose();
530  }
531
532  // Shutdown in reverse of the initialization order.
533  if (devtools_agent_message_filter_.get()) {
534    RemoveFilter(devtools_agent_message_filter_.get());
535    devtools_agent_message_filter_ = NULL;
536  }
537
538  RemoveFilter(audio_input_message_filter_.get());
539  audio_input_message_filter_ = NULL;
540
541  RemoveFilter(audio_message_filter_.get());
542  audio_message_filter_ = NULL;
543
544#if defined(ENABLE_WEBRTC)
545  RTCPeerConnectionHandler::DestructAllHandlers();
546
547  peer_connection_factory_.reset();
548#endif
549  RemoveFilter(vc_manager_->video_capture_message_filter());
550  vc_manager_.reset();
551
552  RemoveFilter(db_message_filter_.get());
553  db_message_filter_ = NULL;
554
555  // Shutdown the file thread if it's running.
556  if (file_thread_)
557    file_thread_->Stop();
558
559  if (compositor_output_surface_filter_.get()) {
560    RemoveFilter(compositor_output_surface_filter_.get());
561    compositor_output_surface_filter_ = NULL;
562  }
563
564  media_thread_.reset();
565  compositor_thread_.reset();
566  input_handler_manager_.reset();
567  if (input_event_filter_.get()) {
568    RemoveFilter(input_event_filter_.get());
569    input_event_filter_ = NULL;
570  }
571
572  // RemoveEmbeddedWorkerRoute may be called while deleting
573  // EmbeddedWorkerDispatcher. So it must be deleted before deleting
574  // RenderThreadImpl.
575  embedded_worker_dispatcher_.reset();
576
577  // Ramp down IDB before we ramp down WebKit (and V8), since IDB classes might
578  // hold pointers to V8 objects (e.g., via pending requests).
579  main_thread_indexed_db_dispatcher_.reset();
580
581  if (webkit_platform_support_)
582    blink::shutdown();
583
584  lazy_tls.Pointer()->Set(NULL);
585
586  // TODO(port)
587#if defined(OS_WIN)
588  // Clean up plugin channels before this thread goes away.
589  NPChannelBase::CleanupChannels();
590#endif
591}
592
593bool RenderThreadImpl::Send(IPC::Message* msg) {
594  // Certain synchronous messages cannot always be processed synchronously by
595  // the browser, e.g., putting up UI and waiting for the user. This could cause
596  // a complete hang of Chrome if a windowed plug-in is trying to communicate
597  // with the renderer thread since the browser's UI thread could be stuck
598  // (within a Windows API call) trying to synchronously communicate with the
599  // plug-in.  The remedy is to pump messages on this thread while the browser
600  // is processing this request. This creates an opportunity for re-entrancy
601  // into WebKit, so we need to take care to disable callbacks, timers, and
602  // pending network loads that could trigger such callbacks.
603  bool pumping_events = false;
604  if (msg->is_sync()) {
605    if (msg->is_caller_pumping_messages()) {
606      pumping_events = true;
607    }
608  }
609
610  bool suspend_webkit_shared_timer = true;  // default value
611  std::swap(suspend_webkit_shared_timer, suspend_webkit_shared_timer_);
612
613  bool notify_webkit_of_modal_loop = true;  // default value
614  std::swap(notify_webkit_of_modal_loop, notify_webkit_of_modal_loop_);
615
616#if defined(ENABLE_PLUGINS)
617  int render_view_id = MSG_ROUTING_NONE;
618#endif
619
620  if (pumping_events) {
621    if (suspend_webkit_shared_timer)
622      webkit_platform_support_->SuspendSharedTimer();
623
624    if (notify_webkit_of_modal_loop)
625      WebView::willEnterModalLoop();
626#if defined(ENABLE_PLUGINS)
627    RenderViewImpl* render_view =
628        RenderViewImpl::FromRoutingID(msg->routing_id());
629    if (render_view) {
630      render_view_id = msg->routing_id();
631      PluginChannelHost::Broadcast(
632          new PluginMsg_SignalModalDialogEvent(render_view_id));
633    }
634#endif
635  }
636
637  bool rv = ChildThread::Send(msg);
638
639  if (pumping_events) {
640#if defined(ENABLE_PLUGINS)
641    if (render_view_id != MSG_ROUTING_NONE) {
642      PluginChannelHost::Broadcast(
643          new PluginMsg_ResetModalDialogEvent(render_view_id));
644    }
645#endif
646
647    if (notify_webkit_of_modal_loop)
648      WebView::didExitModalLoop();
649
650    if (suspend_webkit_shared_timer)
651      webkit_platform_support_->ResumeSharedTimer();
652  }
653
654  return rv;
655}
656
657base::MessageLoop* RenderThreadImpl::GetMessageLoop() {
658  return message_loop();
659}
660
661IPC::SyncChannel* RenderThreadImpl::GetChannel() {
662  return channel();
663}
664
665std::string RenderThreadImpl::GetLocale() {
666  // The browser process should have passed the locale to the renderer via the
667  // --lang command line flag.
668  const CommandLine& parsed_command_line = *CommandLine::ForCurrentProcess();
669  const std::string& lang =
670      parsed_command_line.GetSwitchValueASCII(switches::kLang);
671  DCHECK(!lang.empty());
672  return lang;
673}
674
675IPC::SyncMessageFilter* RenderThreadImpl::GetSyncMessageFilter() {
676  return sync_message_filter();
677}
678
679scoped_refptr<base::MessageLoopProxy>
680    RenderThreadImpl::GetIOMessageLoopProxy() {
681  return ChildProcess::current()->io_message_loop_proxy();
682}
683
684void RenderThreadImpl::AddRoute(int32 routing_id, IPC::Listener* listener) {
685  ChildThread::GetRouter()->AddRoute(routing_id, listener);
686}
687
688void RenderThreadImpl::RemoveRoute(int32 routing_id) {
689  ChildThread::GetRouter()->RemoveRoute(routing_id);
690}
691
692void RenderThreadImpl::AddEmbeddedWorkerRoute(int32 routing_id,
693                                              IPC::Listener* listener) {
694  AddRoute(routing_id, listener);
695  if (devtools_agent_message_filter_.get()) {
696    devtools_agent_message_filter_->AddEmbeddedWorkerRouteOnMainThread(
697        routing_id);
698  }
699}
700
701void RenderThreadImpl::RemoveEmbeddedWorkerRoute(int32 routing_id) {
702  RemoveRoute(routing_id);
703  if (devtools_agent_message_filter_.get()) {
704    devtools_agent_message_filter_->RemoveEmbeddedWorkerRouteOnMainThread(
705        routing_id);
706  }
707}
708
709int RenderThreadImpl::GenerateRoutingID() {
710  int routing_id = MSG_ROUTING_NONE;
711  Send(new ViewHostMsg_GenerateRoutingID(&routing_id));
712  return routing_id;
713}
714
715void RenderThreadImpl::AddFilter(IPC::MessageFilter* filter) {
716  channel()->AddFilter(filter);
717}
718
719void RenderThreadImpl::RemoveFilter(IPC::MessageFilter* filter) {
720  channel()->RemoveFilter(filter);
721}
722
723void RenderThreadImpl::AddObserver(RenderProcessObserver* observer) {
724  observers_.AddObserver(observer);
725}
726
727void RenderThreadImpl::RemoveObserver(RenderProcessObserver* observer) {
728  observers_.RemoveObserver(observer);
729}
730
731void RenderThreadImpl::SetResourceDispatcherDelegate(
732    ResourceDispatcherDelegate* delegate) {
733  resource_dispatcher()->set_delegate(delegate);
734}
735
736void RenderThreadImpl::EnsureWebKitInitialized() {
737  if (webkit_platform_support_)
738    return;
739
740  webkit_platform_support_.reset(new RendererWebKitPlatformSupportImpl);
741  blink::initialize(webkit_platform_support_.get());
742
743  const CommandLine& command_line = *CommandLine::ForCurrentProcess();
744
745  bool enable = command_line.HasSwitch(switches::kEnableThreadedCompositing);
746  if (enable) {
747#if defined(OS_ANDROID)
748    if (SynchronousCompositorFactory* factory =
749        SynchronousCompositorFactory::GetInstance())
750      compositor_message_loop_proxy_ =
751          factory->GetCompositorMessageLoop();
752#endif
753    if (!compositor_message_loop_proxy_.get()) {
754      compositor_thread_.reset(new base::Thread("Compositor"));
755      compositor_thread_->Start();
756#if defined(OS_ANDROID)
757      compositor_thread_->SetPriority(base::kThreadPriority_Display);
758#endif
759      compositor_message_loop_proxy_ =
760          compositor_thread_->message_loop_proxy();
761      compositor_message_loop_proxy_->PostTask(
762          FROM_HERE,
763          base::Bind(base::IgnoreResult(&ThreadRestrictions::SetIOAllowed),
764                     false));
765    }
766
767    InputHandlerManagerClient* input_handler_manager_client = NULL;
768#if defined(OS_ANDROID)
769    if (SynchronousCompositorFactory* factory =
770        SynchronousCompositorFactory::GetInstance()) {
771      input_handler_manager_client = factory->GetInputHandlerManagerClient();
772    }
773#endif
774    if (!input_handler_manager_client) {
775      input_event_filter_ =
776          new InputEventFilter(this, compositor_message_loop_proxy_);
777      AddFilter(input_event_filter_.get());
778      input_handler_manager_client = input_event_filter_.get();
779    }
780    input_handler_manager_.reset(
781        new InputHandlerManager(compositor_message_loop_proxy_,
782                                input_handler_manager_client));
783  }
784
785  scoped_refptr<base::MessageLoopProxy> output_surface_loop;
786  if (enable)
787    output_surface_loop = compositor_message_loop_proxy_;
788  else
789    output_surface_loop = base::MessageLoopProxy::current();
790
791  compositor_output_surface_filter_ =
792      CompositorOutputSurface::CreateFilter(output_surface_loop.get());
793  AddFilter(compositor_output_surface_filter_.get());
794
795  RenderThreadImpl::RegisterSchemes();
796
797  EnableBlinkPlatformLogChannels(
798      command_line.GetSwitchValueASCII(switches::kBlinkPlatformLogChannels));
799
800  SetRuntimeFeaturesDefaultsAndUpdateFromArgs(command_line);
801
802  if (!media::IsMediaLibraryInitialized()) {
803    WebRuntimeFeatures::enableMediaPlayer(false);
804    WebRuntimeFeatures::enableWebAudio(false);
805  }
806
807  FOR_EACH_OBSERVER(RenderProcessObserver, observers_, WebKitInitialized());
808
809  devtools_agent_message_filter_ = new DevToolsAgentFilter();
810  AddFilter(devtools_agent_message_filter_.get());
811
812  if (GetContentClient()->renderer()->RunIdleHandlerWhenWidgetsHidden())
813    ScheduleIdleHandler(kLongIdleHandlerDelayMs);
814
815  SetSharedMemoryAllocationFunction(AllocateSharedMemoryFunction);
816
817  // Limit use of the scaled image cache to when deferred image decoding is
818  // enabled.
819  if (!command_line.HasSwitch(switches::kEnableDeferredImageDecoding) &&
820      !is_impl_side_painting_enabled_)
821    SkGraphics::SetImageCacheByteLimit(0u);
822}
823
824void RenderThreadImpl::RegisterSchemes() {
825  // swappedout: pages should not be accessible, and should also
826  // be treated as empty documents that can commit synchronously.
827  WebString swappedout_scheme(base::ASCIIToUTF16(kSwappedOutScheme));
828  WebSecurityPolicy::registerURLSchemeAsDisplayIsolated(swappedout_scheme);
829  WebSecurityPolicy::registerURLSchemeAsEmptyDocument(swappedout_scheme);
830}
831
832void RenderThreadImpl::NotifyTimezoneChange() {
833  NotifyTimezoneChangeOnThisThread();
834  RenderThread::Get()->PostTaskToAllWebWorkers(
835      base::Bind(&NotifyTimezoneChangeOnThisThread));
836}
837
838void RenderThreadImpl::RecordAction(const base::UserMetricsAction& action) {
839  Send(new ViewHostMsg_UserMetricsRecordAction(action.str_));
840}
841
842void RenderThreadImpl::RecordComputedAction(const std::string& action) {
843  Send(new ViewHostMsg_UserMetricsRecordAction(action));
844}
845
846scoped_ptr<base::SharedMemory>
847    RenderThreadImpl::HostAllocateSharedMemoryBuffer(size_t size) {
848  if (size > static_cast<size_t>(std::numeric_limits<int>::max()))
849    return scoped_ptr<base::SharedMemory>();
850
851  base::SharedMemoryHandle handle;
852  bool success;
853  IPC::Message* message =
854      new ChildProcessHostMsg_SyncAllocateSharedMemory(size, &handle);
855
856  // Allow calling this from the compositor thread.
857  if (base::MessageLoop::current() == message_loop())
858    success = ChildThread::Send(message);
859  else
860    success = sync_message_filter()->Send(message);
861
862  if (!success)
863    return scoped_ptr<base::SharedMemory>();
864
865  if (!base::SharedMemory::IsHandleValid(handle))
866    return scoped_ptr<base::SharedMemory>();
867
868  return scoped_ptr<base::SharedMemory>(new base::SharedMemory(handle, false));
869}
870
871void RenderThreadImpl::RegisterExtension(v8::Extension* extension) {
872  WebScriptController::registerExtension(extension);
873}
874
875void RenderThreadImpl::ScheduleIdleHandler(int64 initial_delay_ms) {
876  idle_notification_delay_in_ms_ = initial_delay_ms;
877  idle_timer_.Stop();
878  idle_timer_.Start(FROM_HERE,
879      base::TimeDelta::FromMilliseconds(initial_delay_ms),
880      this, &RenderThreadImpl::IdleHandler);
881}
882
883void RenderThreadImpl::IdleHandler() {
884  bool run_in_foreground_tab = (widget_count_ > hidden_widget_count_) &&
885                               GetContentClient()->renderer()->
886                                   RunIdleHandlerWhenWidgetsHidden();
887  if (run_in_foreground_tab) {
888    IdleHandlerInForegroundTab();
889    return;
890  }
891
892  base::allocator::ReleaseFreeMemory();
893
894  // Continue the idle timer if the webkit shared timer is not suspended or
895  // something is left to do.
896  bool continue_timer = !webkit_shared_timer_suspended_;
897
898  if (!v8::V8::IdleNotification()) {
899    continue_timer = true;
900  }
901
902  // Schedule next invocation.
903  // Dampen the delay using the algorithm (if delay is in seconds):
904  //    delay = delay + 1 / (delay + 2)
905  // Using floor(delay) has a dampening effect such as:
906  //    1s, 1, 1, 2, 2, 2, 2, 3, 3, ...
907  // If the delay is in milliseconds, the above formula is equivalent to:
908  //    delay_ms / 1000 = delay_ms / 1000 + 1 / (delay_ms / 1000 + 2)
909  // which is equivalent to
910  //    delay_ms = delay_ms + 1000*1000 / (delay_ms + 2000).
911  // Note that idle_notification_delay_in_ms_ would be reset to
912  // kInitialIdleHandlerDelayMs in RenderThreadImpl::WidgetHidden.
913  if (continue_timer) {
914    ScheduleIdleHandler(idle_notification_delay_in_ms_ +
915                        1000000 / (idle_notification_delay_in_ms_ + 2000));
916
917  } else {
918    idle_timer_.Stop();
919  }
920
921  FOR_EACH_OBSERVER(RenderProcessObserver, observers_, IdleNotification());
922}
923
924void RenderThreadImpl::IdleHandlerInForegroundTab() {
925  // Increase the delay in the same way as in IdleHandler,
926  // but make it periodic by reseting it once it is too big.
927  int64 new_delay_ms = idle_notification_delay_in_ms_ +
928                       1000000 / (idle_notification_delay_in_ms_ + 2000);
929  if (new_delay_ms >= kLongIdleHandlerDelayMs)
930    new_delay_ms = kShortIdleHandlerDelayMs;
931
932  if (idle_notifications_to_skip_ > 0) {
933    idle_notifications_to_skip_--;
934  } else  {
935    int cpu_usage = 0;
936    Send(new ViewHostMsg_GetCPUUsage(&cpu_usage));
937    // Idle notification hint roughly specifies the expected duration of the
938    // idle pause. We set it proportional to the idle timer delay.
939    int idle_hint = static_cast<int>(new_delay_ms / 10);
940    if (cpu_usage < kIdleCPUUsageThresholdInPercents) {
941      base::allocator::ReleaseFreeMemory();
942      if (v8::V8::IdleNotification(idle_hint)) {
943        // V8 finished collecting garbage.
944        new_delay_ms = kLongIdleHandlerDelayMs;
945      }
946    }
947  }
948  ScheduleIdleHandler(new_delay_ms);
949}
950
951int64 RenderThreadImpl::GetIdleNotificationDelayInMs() const {
952  return idle_notification_delay_in_ms_;
953}
954
955void RenderThreadImpl::SetIdleNotificationDelayInMs(
956    int64 idle_notification_delay_in_ms) {
957  idle_notification_delay_in_ms_ = idle_notification_delay_in_ms;
958}
959
960void RenderThreadImpl::UpdateHistograms(int sequence_number) {
961  child_histogram_message_filter()->SendHistograms(sequence_number);
962}
963
964int RenderThreadImpl::PostTaskToAllWebWorkers(const base::Closure& closure) {
965  return WorkerTaskRunner::Instance()->PostTaskToAllThreads(closure);
966}
967
968bool RenderThreadImpl::ResolveProxy(const GURL& url, std::string* proxy_list) {
969  bool result = false;
970  Send(new ViewHostMsg_ResolveProxy(url, &result, proxy_list));
971  return result;
972}
973
974void RenderThreadImpl::PostponeIdleNotification() {
975  idle_notifications_to_skip_ = 2;
976}
977
978scoped_refptr<media::GpuVideoAcceleratorFactories>
979RenderThreadImpl::GetGpuFactories() {
980  DCHECK(IsMainThread());
981
982  scoped_refptr<GpuChannelHost> gpu_channel_host = GetGpuChannel();
983  const CommandLine* cmd_line = CommandLine::ForCurrentProcess();
984  scoped_refptr<media::GpuVideoAcceleratorFactories> gpu_factories;
985  scoped_refptr<base::MessageLoopProxy> media_loop_proxy =
986      GetMediaThreadMessageLoopProxy();
987  if (!cmd_line->HasSwitch(switches::kDisableAcceleratedVideoDecode)) {
988    if (!gpu_va_context_provider_ ||
989        gpu_va_context_provider_->DestroyedOnMainThread()) {
990      if (!gpu_channel_host) {
991        gpu_channel_host = EstablishGpuChannelSync(
992            CAUSE_FOR_GPU_LAUNCH_WEBGRAPHICSCONTEXT3DCOMMANDBUFFERIMPL_INITIALIZE);
993      }
994      blink::WebGraphicsContext3D::Attributes attributes;
995      bool lose_context_when_out_of_memory = false;
996      gpu_va_context_provider_ = ContextProviderCommandBuffer::Create(
997          make_scoped_ptr(
998              WebGraphicsContext3DCommandBufferImpl::CreateOffscreenContext(
999                  gpu_channel_host.get(),
1000                  attributes,
1001                  lose_context_when_out_of_memory,
1002                  GURL("chrome://gpu/RenderThreadImpl::GetGpuVDAContext3D"),
1003                  WebGraphicsContext3DCommandBufferImpl::SharedMemoryLimits(),
1004                  NULL)),
1005          "GPU-VideoAccelerator-Offscreen");
1006    }
1007  }
1008  if (gpu_va_context_provider_) {
1009    gpu_factories = RendererGpuVideoAcceleratorFactories::Create(
1010        gpu_channel_host, media_loop_proxy, gpu_va_context_provider_);
1011  }
1012  return gpu_factories;
1013}
1014
1015scoped_ptr<WebGraphicsContext3DCommandBufferImpl>
1016RenderThreadImpl::CreateOffscreenContext3d() {
1017  blink::WebGraphicsContext3D::Attributes attributes;
1018  attributes.shareResources = true;
1019  attributes.depth = false;
1020  attributes.stencil = false;
1021  attributes.antialias = false;
1022  attributes.noAutomaticFlushes = true;
1023  bool lose_context_when_out_of_memory = true;
1024
1025  scoped_refptr<GpuChannelHost> gpu_channel_host(EstablishGpuChannelSync(
1026      CAUSE_FOR_GPU_LAUNCH_WEBGRAPHICSCONTEXT3DCOMMANDBUFFERIMPL_INITIALIZE));
1027  return make_scoped_ptr(
1028      WebGraphicsContext3DCommandBufferImpl::CreateOffscreenContext(
1029          gpu_channel_host.get(),
1030          attributes,
1031          lose_context_when_out_of_memory,
1032          GURL("chrome://gpu/RenderThreadImpl::CreateOffscreenContext3d"),
1033          WebGraphicsContext3DCommandBufferImpl::SharedMemoryLimits(),
1034          NULL));
1035}
1036
1037scoped_refptr<webkit::gpu::ContextProviderWebContext>
1038RenderThreadImpl::SharedMainThreadContextProvider() {
1039  DCHECK(IsMainThread());
1040#if defined(OS_ANDROID)
1041  if (SynchronousCompositorFactory* factory =
1042      SynchronousCompositorFactory::GetInstance())
1043    return factory->GetSharedOffscreenContextProviderForMainThread();
1044#endif
1045
1046  if (!shared_main_thread_contexts_ ||
1047      shared_main_thread_contexts_->DestroyedOnMainThread()) {
1048    shared_main_thread_contexts_ = ContextProviderCommandBuffer::Create(
1049        CreateOffscreenContext3d(), "Offscreen-MainThread");
1050  }
1051  if (shared_main_thread_contexts_ &&
1052      !shared_main_thread_contexts_->BindToCurrentThread())
1053    shared_main_thread_contexts_ = NULL;
1054  return shared_main_thread_contexts_;
1055}
1056
1057AudioRendererMixerManager* RenderThreadImpl::GetAudioRendererMixerManager() {
1058  if (!audio_renderer_mixer_manager_) {
1059    audio_renderer_mixer_manager_.reset(new AudioRendererMixerManager(
1060        GetAudioHardwareConfig()));
1061  }
1062
1063  return audio_renderer_mixer_manager_.get();
1064}
1065
1066media::AudioHardwareConfig* RenderThreadImpl::GetAudioHardwareConfig() {
1067  if (!audio_hardware_config_) {
1068    media::AudioParameters input_params;
1069    media::AudioParameters output_params;
1070    Send(new ViewHostMsg_GetAudioHardwareConfig(
1071        &input_params, &output_params));
1072
1073    audio_hardware_config_.reset(new media::AudioHardwareConfig(
1074        input_params, output_params));
1075    audio_message_filter_->SetAudioHardwareConfig(audio_hardware_config_.get());
1076  }
1077
1078  return audio_hardware_config_.get();
1079}
1080
1081base::WaitableEvent* RenderThreadImpl::GetShutdownEvent() {
1082  return ChildProcess::current()->GetShutDownEvent();
1083}
1084
1085#if defined(OS_WIN)
1086void RenderThreadImpl::PreCacheFontCharacters(const LOGFONT& log_font,
1087                                              const base::string16& str) {
1088  Send(new ViewHostMsg_PreCacheFontCharacters(log_font, str));
1089}
1090
1091void RenderThreadImpl::PreCacheFont(const LOGFONT& log_font) {
1092  Send(new ChildProcessHostMsg_PreCacheFont(log_font));
1093}
1094
1095void RenderThreadImpl::ReleaseCachedFonts() {
1096  Send(new ChildProcessHostMsg_ReleaseCachedFonts());
1097}
1098
1099#endif  // OS_WIN
1100
1101bool RenderThreadImpl::IsMainThread() {
1102  return !!current();
1103}
1104
1105base::MessageLoop* RenderThreadImpl::GetMainLoop() {
1106  return message_loop();
1107}
1108
1109scoped_refptr<base::MessageLoopProxy> RenderThreadImpl::GetIOLoopProxy() {
1110  return io_message_loop_proxy_;
1111}
1112
1113scoped_ptr<base::SharedMemory> RenderThreadImpl::AllocateSharedMemory(
1114    size_t size) {
1115  return scoped_ptr<base::SharedMemory>(
1116      HostAllocateSharedMemoryBuffer(size));
1117}
1118
1119bool RenderThreadImpl::CreateViewCommandBuffer(
1120      int32 surface_id,
1121      const GPUCreateCommandBufferConfig& init_params,
1122      int32 route_id) {
1123  TRACE_EVENT1("gpu",
1124               "RenderThreadImpl::CreateViewCommandBuffer",
1125               "surface_id",
1126               surface_id);
1127
1128  bool succeeded = false;
1129  IPC::Message* message = new GpuHostMsg_CreateViewCommandBuffer(
1130      surface_id,
1131      init_params,
1132      route_id,
1133      &succeeded);
1134
1135  // Allow calling this from the compositor thread.
1136  thread_safe_sender()->Send(message);
1137
1138  return succeeded;
1139}
1140
1141void RenderThreadImpl::CreateImage(
1142    gfx::PluginWindowHandle window,
1143    int32 image_id,
1144    const CreateImageCallback& callback) {
1145  NOTREACHED();
1146}
1147
1148void RenderThreadImpl::DeleteImage(int32 image_id, int32 sync_point) {
1149  NOTREACHED();
1150}
1151
1152scoped_ptr<gfx::GpuMemoryBuffer> RenderThreadImpl::AllocateGpuMemoryBuffer(
1153    size_t width,
1154    size_t height,
1155    unsigned internalformat,
1156    unsigned usage) {
1157  DCHECK(allocate_gpu_memory_buffer_thread_checker_.CalledOnValidThread());
1158
1159  if (!GpuMemoryBufferImpl::IsFormatValid(internalformat))
1160    return scoped_ptr<gfx::GpuMemoryBuffer>();
1161
1162  gfx::GpuMemoryBufferHandle handle;
1163  bool success;
1164  IPC::Message* message = new ChildProcessHostMsg_SyncAllocateGpuMemoryBuffer(
1165      width, height, internalformat, usage, &handle);
1166
1167  // Allow calling this from the compositor thread.
1168  if (base::MessageLoop::current() == message_loop())
1169    success = ChildThread::Send(message);
1170  else
1171    success = sync_message_filter()->Send(message);
1172
1173  if (!success)
1174    return scoped_ptr<gfx::GpuMemoryBuffer>();
1175
1176  return GpuMemoryBufferImpl::CreateFromHandle(
1177             handle, gfx::Size(width, height), internalformat)
1178      .PassAs<gfx::GpuMemoryBuffer>();
1179}
1180
1181void RenderThreadImpl::ConnectToService(
1182    const mojo::String& service_url,
1183    const mojo::String& service_name,
1184    mojo::ScopedMessagePipeHandle message_pipe,
1185    const mojo::String& requestor_url) {
1186  // TODO(darin): Invent some kind of registration system to use here.
1187  if (service_url.To<base::StringPiece>() == kRendererService_WebUISetup) {
1188    WebUISetupImpl::Bind(message_pipe.Pass());
1189  } else {
1190    NOTREACHED() << "Unknown service name";
1191  }
1192}
1193
1194void RenderThreadImpl::DoNotSuspendWebKitSharedTimer() {
1195  suspend_webkit_shared_timer_ = false;
1196}
1197
1198void RenderThreadImpl::DoNotNotifyWebKitOfModalLoop() {
1199  notify_webkit_of_modal_loop_ = false;
1200}
1201
1202void RenderThreadImpl::OnSetZoomLevelForCurrentURL(const std::string& scheme,
1203                                                   const std::string& host,
1204                                                   double zoom_level) {
1205  RenderViewZoomer zoomer(scheme, host, zoom_level);
1206  RenderView::ForEach(&zoomer);
1207}
1208
1209bool RenderThreadImpl::OnControlMessageReceived(const IPC::Message& msg) {
1210  ObserverListBase<RenderProcessObserver>::Iterator it(observers_);
1211  RenderProcessObserver* observer;
1212  while ((observer = it.GetNext()) != NULL) {
1213    if (observer->OnControlMessageReceived(msg))
1214      return true;
1215  }
1216
1217  // Some messages are handled by delegates.
1218  if (appcache_dispatcher_->OnMessageReceived(msg) ||
1219      dom_storage_dispatcher_->OnMessageReceived(msg) ||
1220      embedded_worker_dispatcher_->OnMessageReceived(msg)) {
1221    return true;
1222  }
1223
1224  bool handled = true;
1225  IPC_BEGIN_MESSAGE_MAP(RenderThreadImpl, msg)
1226    IPC_MESSAGE_HANDLER(ViewMsg_SetZoomLevelForCurrentURL,
1227                        OnSetZoomLevelForCurrentURL)
1228    // TODO(port): removed from render_messages_internal.h;
1229    // is there a new non-windows message I should add here?
1230    IPC_MESSAGE_HANDLER(ViewMsg_New, OnCreateNewView)
1231    IPC_MESSAGE_HANDLER(ViewMsg_PurgePluginListCache, OnPurgePluginListCache)
1232    IPC_MESSAGE_HANDLER(ViewMsg_NetworkTypeChanged, OnNetworkTypeChanged)
1233    IPC_MESSAGE_HANDLER(ViewMsg_TempCrashWithData, OnTempCrashWithData)
1234    IPC_MESSAGE_HANDLER(WorkerProcessMsg_CreateWorker, OnCreateNewSharedWorker)
1235    IPC_MESSAGE_HANDLER(ViewMsg_TimezoneChange, OnUpdateTimezone)
1236#if defined(OS_ANDROID)
1237    IPC_MESSAGE_HANDLER(ViewMsg_SetWebKitSharedTimersSuspended,
1238                        OnSetWebKitSharedTimersSuspended)
1239#endif
1240#if defined(OS_MACOSX)
1241    IPC_MESSAGE_HANDLER(ViewMsg_UpdateScrollbarTheme, OnUpdateScrollbarTheme)
1242#endif
1243    IPC_MESSAGE_UNHANDLED(handled = false)
1244  IPC_END_MESSAGE_MAP()
1245  return handled;
1246}
1247
1248void RenderThreadImpl::OnCreateNewView(const ViewMsg_New_Params& params) {
1249  EnsureWebKitInitialized();
1250  // When bringing in render_view, also bring in webkit's glue and jsbindings.
1251  RenderViewImpl::Create(params.opener_route_id,
1252                         params.window_was_created_with_opener,
1253                         params.renderer_preferences,
1254                         params.web_preferences,
1255                         params.view_id,
1256                         params.main_frame_routing_id,
1257                         params.surface_id,
1258                         params.session_storage_namespace_id,
1259                         params.frame_name,
1260                         false,
1261                         params.swapped_out,
1262                         params.proxy_routing_id,
1263                         params.hidden,
1264                         params.never_visible,
1265                         params.next_page_id,
1266                         params.screen_info,
1267                         params.accessibility_mode);
1268}
1269
1270GpuChannelHost* RenderThreadImpl::EstablishGpuChannelSync(
1271    CauseForGpuLaunch cause_for_gpu_launch) {
1272  TRACE_EVENT0("gpu", "RenderThreadImpl::EstablishGpuChannelSync");
1273
1274  if (gpu_channel_.get()) {
1275    // Do nothing if we already have a GPU channel or are already
1276    // establishing one.
1277    if (!gpu_channel_->IsLost())
1278      return gpu_channel_.get();
1279
1280    // Recreate the channel if it has been lost.
1281    gpu_channel_ = NULL;
1282  }
1283
1284  // Ask the browser for the channel name.
1285  int client_id = 0;
1286  IPC::ChannelHandle channel_handle;
1287  gpu::GPUInfo gpu_info;
1288  if (!Send(new GpuHostMsg_EstablishGpuChannel(cause_for_gpu_launch,
1289                                               &client_id,
1290                                               &channel_handle,
1291                                               &gpu_info)) ||
1292#if defined(OS_POSIX)
1293      channel_handle.socket.fd == -1 ||
1294#endif
1295      channel_handle.name.empty()) {
1296    // Otherwise cancel the connection.
1297    return NULL;
1298  }
1299
1300  GetContentClient()->SetGpuInfo(gpu_info);
1301
1302  // Cache some variables that are needed on the compositor thread for our
1303  // implementation of GpuChannelHostFactory.
1304  io_message_loop_proxy_ = ChildProcess::current()->io_message_loop_proxy();
1305
1306  gpu_channel_ = GpuChannelHost::Create(
1307      this, gpu_info, channel_handle,
1308      ChildProcess::current()->GetShutDownEvent());
1309  return gpu_channel_.get();
1310}
1311
1312blink::WebMediaStreamCenter* RenderThreadImpl::CreateMediaStreamCenter(
1313    blink::WebMediaStreamCenterClient* client) {
1314#if defined(OS_ANDROID)
1315  if (CommandLine::ForCurrentProcess()->HasSwitch(
1316      switches::kDisableWebRTC))
1317    return NULL;
1318#endif
1319
1320#if defined(ENABLE_WEBRTC)
1321  if (!media_stream_center_) {
1322    media_stream_center_ = GetContentClient()->renderer()
1323        ->OverrideCreateWebMediaStreamCenter(client);
1324    if (!media_stream_center_) {
1325      scoped_ptr<MediaStreamCenter> media_stream_center(
1326          new MediaStreamCenter(client, GetPeerConnectionDependencyFactory()));
1327      AddObserver(media_stream_center.get());
1328      media_stream_center_ = media_stream_center.release();
1329    }
1330  }
1331#endif
1332  return media_stream_center_;
1333}
1334
1335PeerConnectionDependencyFactory*
1336RenderThreadImpl::GetPeerConnectionDependencyFactory() {
1337  return peer_connection_factory_.get();
1338}
1339
1340GpuChannelHost* RenderThreadImpl::GetGpuChannel() {
1341  if (!gpu_channel_.get())
1342    return NULL;
1343
1344  if (gpu_channel_->IsLost())
1345    return NULL;
1346
1347  return gpu_channel_.get();
1348}
1349
1350void RenderThreadImpl::OnPurgePluginListCache(bool reload_pages) {
1351  EnsureWebKitInitialized();
1352  // The call below will cause a GetPlugins call with refresh=true, but at this
1353  // point we already know that the browser has refreshed its list, so disable
1354  // refresh temporarily to prevent each renderer process causing the list to be
1355  // regenerated.
1356  webkit_platform_support_->set_plugin_refresh_allowed(false);
1357  blink::resetPluginCache(reload_pages);
1358  webkit_platform_support_->set_plugin_refresh_allowed(true);
1359
1360  FOR_EACH_OBSERVER(RenderProcessObserver, observers_, PluginListChanged());
1361}
1362
1363void RenderThreadImpl::OnNetworkTypeChanged(
1364    net::NetworkChangeNotifier::ConnectionType type) {
1365  EnsureWebKitInitialized();
1366  bool online = type != net::NetworkChangeNotifier::CONNECTION_NONE;
1367  WebNetworkStateNotifier::setOnLine(online);
1368  FOR_EACH_OBSERVER(
1369      RenderProcessObserver, observers_, NetworkStateChanged(online));
1370  WebNetworkStateNotifier::setWebConnectionType(
1371      NetConnectionTypeToWebConnectionType(type));
1372}
1373
1374void RenderThreadImpl::OnTempCrashWithData(const GURL& data) {
1375  GetContentClient()->SetActiveURL(data);
1376  CHECK(false);
1377}
1378
1379void RenderThreadImpl::OnUpdateTimezone() {
1380  NotifyTimezoneChange();
1381}
1382
1383
1384#if defined(OS_ANDROID)
1385void RenderThreadImpl::OnSetWebKitSharedTimersSuspended(bool suspend) {
1386  if (suspend_webkit_shared_timer_) {
1387    EnsureWebKitInitialized();
1388    if (suspend) {
1389      webkit_platform_support_->SuspendSharedTimer();
1390    } else {
1391      webkit_platform_support_->ResumeSharedTimer();
1392    }
1393    webkit_shared_timer_suspended_ = suspend;
1394  }
1395}
1396#endif
1397
1398#if defined(OS_MACOSX)
1399void RenderThreadImpl::OnUpdateScrollbarTheme(
1400    float initial_button_delay,
1401    float autoscroll_button_delay,
1402    bool jump_on_track_click,
1403    blink::ScrollerStyle preferred_scroller_style,
1404    bool redraw) {
1405  EnsureWebKitInitialized();
1406  static_cast<WebScrollbarBehaviorImpl*>(
1407      webkit_platform_support_->scrollbarBehavior())->set_jump_on_track_click(
1408          jump_on_track_click);
1409  blink::WebScrollbarTheme::updateScrollbars(initial_button_delay,
1410                                             autoscroll_button_delay,
1411                                             preferred_scroller_style,
1412                                             redraw);
1413}
1414#endif
1415
1416void RenderThreadImpl::OnCreateNewSharedWorker(
1417    const WorkerProcessMsg_CreateWorker_Params& params) {
1418  // EmbeddedSharedWorkerStub will self-destruct.
1419  new EmbeddedSharedWorkerStub(params.url,
1420                               params.name,
1421                               params.content_security_policy,
1422                               params.security_policy_type,
1423                               params.pause_on_start,
1424                               params.route_id);
1425}
1426
1427void RenderThreadImpl::OnMemoryPressure(
1428    base::MemoryPressureListener::MemoryPressureLevel memory_pressure_level) {
1429  base::allocator::ReleaseFreeMemory();
1430
1431  if (memory_pressure_level ==
1432      base::MemoryPressureListener::MEMORY_PRESSURE_CRITICAL) {
1433    // Trigger full v8 garbage collection on critical memory notification.
1434    v8::V8::LowMemoryNotification();
1435
1436    if (webkit_platform_support_) {
1437      // Clear the image cache. Do not call into blink if it is not initialized.
1438      blink::WebImageCache::clear();
1439    }
1440
1441    // Purge Skia font cache, by setting it to 0 and then again to the previous
1442    // limit.
1443    size_t font_cache_limit = SkGraphics::SetFontCacheLimit(0);
1444    SkGraphics::SetFontCacheLimit(font_cache_limit);
1445  } else {
1446    // Otherwise trigger a couple of v8 GCs using IdleNotification.
1447    if (!v8::V8::IdleNotification())
1448      v8::V8::IdleNotification();
1449  }
1450}
1451
1452scoped_refptr<base::MessageLoopProxy>
1453RenderThreadImpl::GetFileThreadMessageLoopProxy() {
1454  DCHECK(message_loop() == base::MessageLoop::current());
1455  if (!file_thread_) {
1456    file_thread_.reset(new base::Thread("Renderer::FILE"));
1457    file_thread_->Start();
1458  }
1459  return file_thread_->message_loop_proxy();
1460}
1461
1462scoped_refptr<base::MessageLoopProxy>
1463RenderThreadImpl::GetMediaThreadMessageLoopProxy() {
1464  DCHECK(message_loop() == base::MessageLoop::current());
1465  if (!media_thread_) {
1466    media_thread_.reset(new base::Thread("Media"));
1467    media_thread_->Start();
1468
1469#if defined(OS_ANDROID)
1470    renderer_demuxer_ = new RendererDemuxerAndroid();
1471    AddFilter(renderer_demuxer_.get());
1472#endif
1473  }
1474  return media_thread_->message_loop_proxy();
1475}
1476
1477void RenderThreadImpl::SetFlingCurveParameters(
1478    const std::vector<float>& new_touchpad,
1479    const std::vector<float>& new_touchscreen) {
1480  webkit_platform_support_->SetFlingCurveParameters(new_touchpad,
1481                                                    new_touchscreen);
1482
1483}
1484
1485void RenderThreadImpl::SampleGamepads(blink::WebGamepads* data) {
1486  gamepad_shared_memory_reader_->SampleGamepads(*data);
1487}
1488
1489void RenderThreadImpl::SetGamepadListener(blink::WebGamepadListener* listener) {
1490  gamepad_shared_memory_reader_->SetGamepadListener(listener);
1491}
1492
1493void RenderThreadImpl::WidgetCreated() {
1494  widget_count_++;
1495}
1496
1497void RenderThreadImpl::WidgetDestroyed() {
1498  widget_count_--;
1499}
1500
1501void RenderThreadImpl::WidgetHidden() {
1502  DCHECK_LT(hidden_widget_count_, widget_count_);
1503  hidden_widget_count_++;
1504
1505  if (widget_count_ && hidden_widget_count_ == widget_count_) {
1506#if !defined(SYSTEM_NATIVELY_SIGNALS_MEMORY_PRESSURE)
1507    // TODO(vollick): Remove this this heavy-handed approach once we're polling
1508    // the real system memory pressure.
1509    base::MemoryPressureListener::NotifyMemoryPressure(
1510        base::MemoryPressureListener::MEMORY_PRESSURE_MODERATE);
1511#endif
1512    if (GetContentClient()->renderer()->RunIdleHandlerWhenWidgetsHidden())
1513      ScheduleIdleHandler(kInitialIdleHandlerDelayMs);
1514  }
1515}
1516
1517void RenderThreadImpl::WidgetRestored() {
1518  DCHECK_GT(hidden_widget_count_, 0);
1519  hidden_widget_count_--;
1520
1521  if (!GetContentClient()->renderer()->RunIdleHandlerWhenWidgetsHidden()) {
1522    return;
1523  }
1524
1525  ScheduleIdleHandler(kLongIdleHandlerDelayMs);
1526}
1527
1528}  // namespace content
1529