render_thread_impl.cc revision e5d81f57cb97b3b6b7fccc9c5610d21eb81db09d 
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/resource_messages.h"
55#include "content/common/view_messages.h"
56#include "content/common/worker_messages.h"
57#include "content/public/common/content_constants.h"
58#include "content/public/common/content_paths.h"
59#include "content/public/common/content_switches.h"
60#include "content/public/common/renderer_preferences.h"
61#include "content/public/common/url_constants.h"
62#include "content/public/renderer/content_renderer_client.h"
63#include "content/public/renderer/render_process_observer.h"
64#include "content/public/renderer/render_view_visitor.h"
65#include "content/renderer/devtools/devtools_agent_filter.h"
66#include "content/renderer/dom_storage/dom_storage_dispatcher.h"
67#include "content/renderer/dom_storage/webstoragearea_impl.h"
68#include "content/renderer/dom_storage/webstoragenamespace_impl.h"
69#include "content/renderer/gamepad_shared_memory_reader.h"
70#include "content/renderer/gpu/compositor_output_surface.h"
71#include "content/renderer/gpu/gpu_benchmarking_extension.h"
72#include "content/renderer/input/input_event_filter.h"
73#include "content/renderer/input/input_handler_manager.h"
74#include "content/renderer/media/audio_input_message_filter.h"
75#include "content/renderer/media/audio_message_filter.h"
76#include "content/renderer/media/audio_renderer_mixer_manager.h"
77#include "content/renderer/media/media_stream_center.h"
78#include "content/renderer/media/media_stream_dependency_factory.h"
79#include "content/renderer/media/midi_message_filter.h"
80#include "content/renderer/media/peer_connection_tracker.h"
81#include "content/renderer/media/renderer_gpu_video_accelerator_factories.h"
82#include "content/renderer/media/video_capture_impl_manager.h"
83#include "content/renderer/media/video_capture_message_filter.h"
84#include "content/renderer/media/webrtc_identity_service.h"
85#include "content/renderer/p2p/socket_dispatcher.h"
86#include "content/renderer/render_process_impl.h"
87#include "content/renderer/render_view_impl.h"
88#include "content/renderer/renderer_webkitplatformsupport_impl.h"
89#include "content/renderer/service_worker/embedded_worker_context_message_filter.h"
90#include "content/renderer/service_worker/embedded_worker_dispatcher.h"
91#include "content/renderer/shared_worker/embedded_shared_worker_stub.h"
92#include "grit/content_resources.h"
93#include "ipc/ipc_channel_handle.h"
94#include "ipc/ipc_forwarding_message_filter.h"
95#include "ipc/ipc_platform_file.h"
96#include "media/base/audio_hardware_config.h"
97#include "media/base/media.h"
98#include "media/filters/gpu_video_accelerator_factories.h"
99#include "net/base/net_errors.h"
100#include "net/base/net_util.h"
101#include "skia/ext/event_tracer_impl.h"
102#include "third_party/WebKit/public/platform/WebString.h"
103#include "third_party/WebKit/public/web/WebColorName.h"
104#include "third_party/WebKit/public/web/WebDatabase.h"
105#include "third_party/WebKit/public/web/WebDocument.h"
106#include "third_party/WebKit/public/web/WebFrame.h"
107#include "third_party/WebKit/public/web/WebImageCache.h"
108#include "third_party/WebKit/public/web/WebKit.h"
109#include "third_party/WebKit/public/web/WebNetworkStateNotifier.h"
110#include "third_party/WebKit/public/web/WebPopupMenu.h"
111#include "third_party/WebKit/public/web/WebRuntimeFeatures.h"
112#include "third_party/WebKit/public/web/WebScriptController.h"
113#include "third_party/WebKit/public/web/WebSecurityPolicy.h"
114#include "third_party/WebKit/public/web/WebView.h"
115#include "third_party/skia/include/core/SkGraphics.h"
116#include "ui/base/layout.h"
117#include "ui/base/ui_base_switches.h"
118#include "v8/include/v8.h"
119#include "webkit/renderer/compositor_bindings/web_external_bitmap_impl.h"
120#include "webkit/renderer/compositor_bindings/web_layer_impl.h"
121
122#if defined(OS_ANDROID)
123#include <cpu-features.h>
124#include "content/renderer/android/synchronous_compositor_factory.h"
125#include "content/renderer/media/android/renderer_demuxer_android.h"
126#endif
127
128#if defined(OS_MACOSX)
129#include "content/renderer/webscrollbarbehavior_impl_mac.h"
130#endif
131
132#if defined(OS_POSIX)
133#include "ipc/ipc_channel_posix.h"
134#endif
135
136#if defined(OS_WIN)
137#include <windows.h>
138#include <objbase.h>
139#else
140// TODO(port)
141#include "base/memory/scoped_handle.h"
142#include "content/child/npapi/np_channel_base.h"
143#endif
144
145#if defined(ENABLE_PLUGINS)
146#include "content/renderer/npapi/plugin_channel_host.h"
147#endif
148
149#if defined(USE_MOJO)
150#include "content/renderer/mojo/mojo_render_process_observer.h"
151#endif
152
153using base::ThreadRestrictions;
154using blink::WebDocument;
155using blink::WebFrame;
156using blink::WebNetworkStateNotifier;
157using blink::WebRuntimeFeatures;
158using blink::WebScriptController;
159using blink::WebSecurityPolicy;
160using blink::WebString;
161using blink::WebView;
162
163namespace content {
164
165namespace {
166
167const int64 kInitialIdleHandlerDelayMs = 1000;
168const int64 kShortIdleHandlerDelayMs = 1000;
169const int64 kLongIdleHandlerDelayMs = 30*1000;
170const int kIdleCPUUsageThresholdInPercents = 3;
171const int kMinRasterThreads = 1;
172const int kMaxRasterThreads = 64;
173
174// Keep the global RenderThreadImpl in a TLS slot so it is impossible to access
175// incorrectly from the wrong thread.
176base::LazyInstance<base::ThreadLocalPointer<RenderThreadImpl> >
177    lazy_tls = LAZY_INSTANCE_INITIALIZER;
178
179class RenderViewZoomer : public RenderViewVisitor {
180 public:
181  RenderViewZoomer(const std::string& scheme,
182                   const std::string& host,
183                   double zoom_level) : scheme_(scheme),
184                                        host_(host),
185                                        zoom_level_(zoom_level) {
186  }
187
188  virtual bool Visit(RenderView* render_view) OVERRIDE {
189    WebView* webview = render_view->GetWebView();
190    WebDocument document = webview->mainFrame()->document();
191
192    // Don't set zoom level for full-page plugin since they don't use the same
193    // zoom settings.
194    if (document.isPluginDocument())
195      return true;
196    GURL url(document.url());
197    // Empty scheme works as wildcard that matches any scheme,
198    if ((net::GetHostOrSpecFromURL(url) == host_) &&
199        (scheme_.empty() || scheme_ == url.scheme())) {
200      webview->setZoomLevel(zoom_level_);
201    }
202    return true;
203  }
204
205 private:
206  const std::string scheme_;
207  const std::string host_;
208  const double zoom_level_;
209
210  DISALLOW_COPY_AND_ASSIGN(RenderViewZoomer);
211};
212
213std::string HostToCustomHistogramSuffix(const std::string& host) {
214  if (host == "mail.google.com")
215    return ".gmail";
216  if (host == "docs.google.com" || host == "drive.google.com")
217    return ".docs";
218  if (host == "plus.google.com")
219    return ".plus";
220  return std::string();
221}
222
223void* CreateHistogram(
224    const char *name, int min, int max, size_t buckets) {
225  if (min <= 0)
226    min = 1;
227  std::string histogram_name;
228  RenderThreadImpl* render_thread_impl = RenderThreadImpl::current();
229  if (render_thread_impl) {  // Can be null in tests.
230    histogram_name = render_thread_impl->
231        histogram_customizer()->ConvertToCustomHistogramName(name);
232  } else {
233    histogram_name = std::string(name);
234  }
235  base::HistogramBase* histogram = base::Histogram::FactoryGet(
236      histogram_name, min, max, buckets,
237      base::Histogram::kUmaTargetedHistogramFlag);
238  return histogram;
239}
240
241void AddHistogramSample(void* hist, int sample) {
242  base::Histogram* histogram = static_cast<base::Histogram*>(hist);
243  histogram->Add(sample);
244}
245
246scoped_ptr<base::SharedMemory> AllocateSharedMemoryFunction(size_t size) {
247  return RenderThreadImpl::Get()->HostAllocateSharedMemoryBuffer(size);
248}
249
250void EnableBlinkPlatformLogChannels(const std::string& channels) {
251  if (channels.empty())
252    return;
253  base::StringTokenizer t(channels, ", ");
254  while (t.GetNext())
255    blink::enableLogChannel(t.token().c_str());
256}
257
258void NotifyTimezoneChangeOnThisThread() {
259  v8::Isolate* isolate = v8::Isolate::GetCurrent();
260  if (!isolate)
261    return;
262  v8::Date::DateTimeConfigurationChangeNotification(isolate);
263}
264
265}  // namespace
266
267RenderThreadImpl::HistogramCustomizer::HistogramCustomizer() {
268  custom_histograms_.insert("V8.MemoryExternalFragmentationTotal");
269  custom_histograms_.insert("V8.MemoryHeapSampleTotalCommitted");
270  custom_histograms_.insert("V8.MemoryHeapSampleTotalUsed");
271}
272
273RenderThreadImpl::HistogramCustomizer::~HistogramCustomizer() {}
274
275void RenderThreadImpl::HistogramCustomizer::RenderViewNavigatedToHost(
276    const std::string& host, size_t view_count) {
277  if (CommandLine::ForCurrentProcess()->HasSwitch(
278      switches::kDisableHistogramCustomizer)) {
279    return;
280  }
281  // Check if all RenderViews are displaying a page from the same host. If there
282  // is only one RenderView, the common host is this view's host. If there are
283  // many, check if this one shares the common host of the other
284  // RenderViews. It's ok to not detect some cases where the RenderViews share a
285  // common host. This information is only used for producing custom histograms.
286  if (view_count == 1)
287    SetCommonHost(host);
288  else if (host != common_host_)
289    SetCommonHost(std::string());
290}
291
292std::string RenderThreadImpl::HistogramCustomizer::ConvertToCustomHistogramName(
293    const char* histogram_name) const {
294  std::string name(histogram_name);
295  if (!common_host_histogram_suffix_.empty() &&
296      custom_histograms_.find(name) != custom_histograms_.end())
297    name += common_host_histogram_suffix_;
298  return name;
299}
300
301void RenderThreadImpl::HistogramCustomizer::SetCommonHost(
302    const std::string& host) {
303  if (host != common_host_) {
304    common_host_ = host;
305    common_host_histogram_suffix_ = HostToCustomHistogramSuffix(host);
306    v8::V8::SetCreateHistogramFunction(CreateHistogram);
307  }
308}
309
310RenderThreadImpl* RenderThreadImpl::current() {
311  return lazy_tls.Pointer()->Get();
312}
313
314// When we run plugins in process, we actually run them on the render thread,
315// which means that we need to make the render thread pump UI events.
316RenderThreadImpl::RenderThreadImpl() {
317  Init();
318}
319
320RenderThreadImpl::RenderThreadImpl(const std::string& channel_name)
321    : ChildThread(channel_name) {
322  Init();
323}
324
325void RenderThreadImpl::Init() {
326  TRACE_EVENT_BEGIN_ETW("RenderThreadImpl::Init", 0, "");
327
328  base::debug::TraceLog::GetInstance()->SetThreadSortIndex(
329      base::PlatformThread::CurrentId(),
330      kTraceEventRendererMainThreadSortIndex);
331
332  v8::V8::SetCounterFunction(base::StatsTable::FindLocation);
333  v8::V8::SetCreateHistogramFunction(CreateHistogram);
334  v8::V8::SetAddHistogramSampleFunction(AddHistogramSample);
335
336#if defined(OS_MACOSX) || defined(OS_ANDROID)
337  // On Mac and Android, the select popups are rendered by the browser.
338  blink::WebView::setUseExternalPopupMenus(true);
339#endif
340
341  lazy_tls.Pointer()->Set(this);
342
343  // Register this object as the main thread.
344  ChildProcess::current()->set_main_thread(this);
345
346  // In single process the single process is all there is.
347  suspend_webkit_shared_timer_ = true;
348  notify_webkit_of_modal_loop_ = true;
349  webkit_shared_timer_suspended_ = false;
350  widget_count_ = 0;
351  hidden_widget_count_ = 0;
352  idle_notification_delay_in_ms_ = kInitialIdleHandlerDelayMs;
353  idle_notifications_to_skip_ = 0;
354  layout_test_mode_ = false;
355
356  appcache_dispatcher_.reset(
357      new AppCacheDispatcher(Get(), new AppCacheFrontendImpl()));
358  dom_storage_dispatcher_.reset(new DomStorageDispatcher());
359  main_thread_indexed_db_dispatcher_.reset(new IndexedDBDispatcher(
360      thread_safe_sender()));
361  embedded_worker_dispatcher_.reset(new EmbeddedWorkerDispatcher());
362
363  media_stream_center_ = NULL;
364
365  db_message_filter_ = new DBMessageFilter();
366  AddFilter(db_message_filter_.get());
367
368  vc_manager_.reset(new VideoCaptureImplManager());
369  AddFilter(vc_manager_->video_capture_message_filter());
370
371#if defined(ENABLE_WEBRTC)
372  peer_connection_tracker_.reset(new PeerConnectionTracker());
373  AddObserver(peer_connection_tracker_.get());
374
375  p2p_socket_dispatcher_ =
376      new P2PSocketDispatcher(GetIOMessageLoopProxy().get());
377  AddFilter(p2p_socket_dispatcher_.get());
378
379  webrtc_identity_service_.reset(new WebRTCIdentityService());
380
381  media_stream_factory_.reset(new MediaStreamDependencyFactory(
382      p2p_socket_dispatcher_.get()));
383  AddObserver(media_stream_factory_.get());
384#endif  // defined(ENABLE_WEBRTC)
385
386  audio_input_message_filter_ =
387      new AudioInputMessageFilter(GetIOMessageLoopProxy());
388  AddFilter(audio_input_message_filter_.get());
389
390  audio_message_filter_ = new AudioMessageFilter(GetIOMessageLoopProxy());
391  AddFilter(audio_message_filter_.get());
392
393  midi_message_filter_ = new MidiMessageFilter(GetIOMessageLoopProxy());
394  AddFilter(midi_message_filter_.get());
395
396  AddFilter((new IndexedDBMessageFilter(thread_safe_sender()))->GetFilter());
397
398  AddFilter((new EmbeddedWorkerContextMessageFilter())->GetFilter());
399
400#if defined(USE_MOJO)
401  // MojoRenderProcessObserver deletes itself as necessary.
402  new MojoRenderProcessObserver(this);
403#endif
404
405  GetContentClient()->renderer()->RenderThreadStarted();
406
407  InitSkiaEventTracer();
408
409  const CommandLine& command_line = *CommandLine::ForCurrentProcess();
410  if (command_line.HasSwitch(cc::switches::kEnableGpuBenchmarking))
411      RegisterExtension(GpuBenchmarkingExtension::Get());
412
413  is_impl_side_painting_enabled_ =
414      command_line.HasSwitch(switches::kEnableImplSidePainting);
415  webkit::WebLayerImpl::SetImplSidePaintingEnabled(
416      is_impl_side_painting_enabled_);
417
418  is_map_image_enabled_ =
419      command_line.HasSwitch(switches::kEnableMapImage) &&
420      !command_line.HasSwitch(switches::kDisableMapImage);
421
422  if (command_line.HasSwitch(switches::kDisableLCDText)) {
423    is_lcd_text_enabled_ = false;
424  } else if (command_line.HasSwitch(switches::kEnableLCDText)) {
425    is_lcd_text_enabled_ = true;
426  } else {
427#if defined(OS_ANDROID)
428    is_lcd_text_enabled_ = false;
429#else
430    is_lcd_text_enabled_ = true;
431#endif
432  }
433
434  is_gpu_rasterization_enabled_ =
435      command_line.HasSwitch(switches::kEnableGpuRasterization);
436  is_gpu_rasterization_forced_ =
437      command_line.HasSwitch(switches::kForceGpuRasterization);
438
439  is_low_res_tiling_enabled_ = true;
440  if (command_line.HasSwitch(switches::kDisableLowResTiling) &&
441      !command_line.HasSwitch(switches::kEnableLowResTiling)) {
442    is_low_res_tiling_enabled_ = false;
443  }
444
445  // Note that under Linux, the media library will normally already have
446  // been initialized by the Zygote before this instance became a Renderer.
447  base::FilePath media_path;
448  PathService::Get(DIR_MEDIA_LIBS, &media_path);
449  if (!media_path.empty())
450    media::InitializeMediaLibrary(media_path);
451
452  memory_pressure_listener_.reset(new base::MemoryPressureListener(
453      base::Bind(&RenderThreadImpl::OnMemoryPressure, base::Unretained(this))));
454
455  std::vector<base::DiscardableMemoryType> supported_types;
456  base::DiscardableMemory::GetSupportedTypes(&supported_types);
457  DCHECK(!supported_types.empty());
458
459  // The default preferred type is always the first one in list.
460  base::DiscardableMemoryType type = supported_types[0];
461
462  if (command_line.HasSwitch(switches::kUseDiscardableMemory)) {
463    std::string requested_type_name = command_line.GetSwitchValueASCII(
464        switches::kUseDiscardableMemory);
465    base::DiscardableMemoryType requested_type =
466        base::DiscardableMemory::GetNamedType(requested_type_name);
467    if (std::find(supported_types.begin(),
468                  supported_types.end(),
469                  requested_type) != supported_types.end()) {
470      type = requested_type;
471    } else {
472      LOG(ERROR) << "Requested discardable memory type is not supported.";
473    }
474  }
475
476  base::DiscardableMemory::SetPreferredType(type);
477
478  // Allow discardable memory implementations to register memory pressure
479  // listeners.
480  base::DiscardableMemory::RegisterMemoryPressureListeners();
481
482  // AllocateGpuMemoryBuffer must be used exclusively on one thread but
483  // it doesn't have to be the same thread RenderThreadImpl is created on.
484  allocate_gpu_memory_buffer_thread_checker_.DetachFromThread();
485
486  if (command_line.HasSwitch(switches::kNumRasterThreads)) {
487    int num_raster_threads;
488    std::string string_value =
489        command_line.GetSwitchValueASCII(switches::kNumRasterThreads);
490    if (base::StringToInt(string_value, &num_raster_threads) &&
491        num_raster_threads >= kMinRasterThreads &&
492        num_raster_threads <= kMaxRasterThreads) {
493      cc::RasterWorkerPool::SetNumRasterThreads(num_raster_threads);
494    } else {
495      LOG(WARNING) << "Failed to parse switch " <<
496                      switches::kNumRasterThreads  << ": " << string_value;
497    }
498  }
499
500  TRACE_EVENT_END_ETW("RenderThreadImpl::Init", 0, "");
501}
502
503RenderThreadImpl::~RenderThreadImpl() {
504}
505
506void RenderThreadImpl::Shutdown() {
507  FOR_EACH_OBSERVER(
508      RenderProcessObserver, observers_, OnRenderProcessShutdown());
509
510  ChildThread::Shutdown();
511
512  // Wait for all databases to be closed.
513  if (webkit_platform_support_) {
514    webkit_platform_support_->web_database_observer_impl()->
515        WaitForAllDatabasesToClose();
516  }
517
518  // Shutdown in reverse of the initialization order.
519  if (devtools_agent_message_filter_.get()) {
520    RemoveFilter(devtools_agent_message_filter_.get());
521    devtools_agent_message_filter_ = NULL;
522  }
523
524  RemoveFilter(audio_input_message_filter_.get());
525  audio_input_message_filter_ = NULL;
526
527  RemoveFilter(audio_message_filter_.get());
528  audio_message_filter_ = NULL;
529
530  // |media_stream_factory_| produces users of |vc_manager_| so it must be
531  // destroyed first.
532#if defined(ENABLE_WEBRTC)
533  media_stream_factory_.reset();
534#endif
535  RemoveFilter(vc_manager_->video_capture_message_filter());
536  vc_manager_.reset();
537
538  RemoveFilter(db_message_filter_.get());
539  db_message_filter_ = NULL;
540
541  // Shutdown the file thread if it's running.
542  if (file_thread_)
543    file_thread_->Stop();
544
545  if (compositor_output_surface_filter_.get()) {
546    RemoveFilter(compositor_output_surface_filter_.get());
547    compositor_output_surface_filter_ = NULL;
548  }
549
550  media_thread_.reset();
551  compositor_thread_.reset();
552  input_handler_manager_.reset();
553  if (input_event_filter_.get()) {
554    RemoveFilter(input_event_filter_.get());
555    input_event_filter_ = NULL;
556  }
557
558  // Ramp down IDB before we ramp down WebKit (and V8), since IDB classes might
559  // hold pointers to V8 objects (e.g., via pending requests).
560  main_thread_indexed_db_dispatcher_.reset();
561
562  if (webkit_platform_support_)
563    blink::shutdown();
564
565  lazy_tls.Pointer()->Set(NULL);
566
567  // TODO(port)
568#if defined(OS_WIN)
569  // Clean up plugin channels before this thread goes away.
570  NPChannelBase::CleanupChannels();
571#endif
572
573  // Leak shared contexts on other threads, as we can not get to the correct
574  // thread to destroy them.
575  if (offscreen_compositor_contexts_.get())
576    offscreen_compositor_contexts_->set_leak_on_destroy();
577}
578
579bool RenderThreadImpl::Send(IPC::Message* msg) {
580  // Certain synchronous messages cannot always be processed synchronously by
581  // the browser, e.g., putting up UI and waiting for the user. This could cause
582  // a complete hang of Chrome if a windowed plug-in is trying to communicate
583  // with the renderer thread since the browser's UI thread could be stuck
584  // (within a Windows API call) trying to synchronously communicate with the
585  // plug-in.  The remedy is to pump messages on this thread while the browser
586  // is processing this request. This creates an opportunity for re-entrancy
587  // into WebKit, so we need to take care to disable callbacks, timers, and
588  // pending network loads that could trigger such callbacks.
589  bool pumping_events = false;
590  if (msg->is_sync()) {
591    if (msg->is_caller_pumping_messages()) {
592      pumping_events = true;
593    }
594  }
595
596  bool suspend_webkit_shared_timer = true;  // default value
597  std::swap(suspend_webkit_shared_timer, suspend_webkit_shared_timer_);
598
599  bool notify_webkit_of_modal_loop = true;  // default value
600  std::swap(notify_webkit_of_modal_loop, notify_webkit_of_modal_loop_);
601
602#if defined(ENABLE_PLUGINS)
603  int render_view_id = MSG_ROUTING_NONE;
604#endif
605
606  if (pumping_events) {
607    if (suspend_webkit_shared_timer)
608      webkit_platform_support_->SuspendSharedTimer();
609
610    if (notify_webkit_of_modal_loop)
611      WebView::willEnterModalLoop();
612#if defined(ENABLE_PLUGINS)
613    RenderViewImpl* render_view =
614        RenderViewImpl::FromRoutingID(msg->routing_id());
615    if (render_view) {
616      render_view_id = msg->routing_id();
617      PluginChannelHost::Broadcast(
618          new PluginMsg_SignalModalDialogEvent(render_view_id));
619    }
620#endif
621  }
622
623  bool rv = ChildThread::Send(msg);
624
625  if (pumping_events) {
626#if defined(ENABLE_PLUGINS)
627    if (render_view_id != MSG_ROUTING_NONE) {
628      PluginChannelHost::Broadcast(
629          new PluginMsg_ResetModalDialogEvent(render_view_id));
630    }
631#endif
632
633    if (notify_webkit_of_modal_loop)
634      WebView::didExitModalLoop();
635
636    if (suspend_webkit_shared_timer)
637      webkit_platform_support_->ResumeSharedTimer();
638  }
639
640  return rv;
641}
642
643base::MessageLoop* RenderThreadImpl::GetMessageLoop() {
644  return message_loop();
645}
646
647IPC::SyncChannel* RenderThreadImpl::GetChannel() {
648  return channel();
649}
650
651std::string RenderThreadImpl::GetLocale() {
652  // The browser process should have passed the locale to the renderer via the
653  // --lang command line flag.
654  const CommandLine& parsed_command_line = *CommandLine::ForCurrentProcess();
655  const std::string& lang =
656      parsed_command_line.GetSwitchValueASCII(switches::kLang);
657  DCHECK(!lang.empty());
658  return lang;
659}
660
661IPC::SyncMessageFilter* RenderThreadImpl::GetSyncMessageFilter() {
662  return sync_message_filter();
663}
664
665scoped_refptr<base::MessageLoopProxy>
666    RenderThreadImpl::GetIOMessageLoopProxy() {
667  return ChildProcess::current()->io_message_loop_proxy();
668}
669
670void RenderThreadImpl::AddRoute(int32 routing_id, IPC::Listener* listener) {
671  ChildThread::GetRouter()->AddRoute(routing_id, listener);
672}
673
674void RenderThreadImpl::RemoveRoute(int32 routing_id) {
675  ChildThread::GetRouter()->RemoveRoute(routing_id);
676}
677
678void RenderThreadImpl::AddSharedWorkerRoute(int32 routing_id,
679                                            IPC::Listener* listener) {
680  AddRoute(routing_id, listener);
681  if (devtools_agent_message_filter_.get()) {
682    devtools_agent_message_filter_->AddSharedWorkerRouteOnMainThread(
683        routing_id);
684  }
685}
686
687void RenderThreadImpl::RemoveSharedWorkerRoute(int32 routing_id) {
688  RemoveRoute(routing_id);
689  if (devtools_agent_message_filter_.get()) {
690    devtools_agent_message_filter_->RemoveSharedWorkerRouteOnMainThread(
691        routing_id);
692  }
693}
694
695int RenderThreadImpl::GenerateRoutingID() {
696  int routing_id = MSG_ROUTING_NONE;
697  Send(new ViewHostMsg_GenerateRoutingID(&routing_id));
698  return routing_id;
699}
700
701void RenderThreadImpl::AddFilter(IPC::ChannelProxy::MessageFilter* filter) {
702  channel()->AddFilter(filter);
703}
704
705void RenderThreadImpl::RemoveFilter(IPC::ChannelProxy::MessageFilter* filter) {
706  channel()->RemoveFilter(filter);
707}
708
709void RenderThreadImpl::AddObserver(RenderProcessObserver* observer) {
710  observers_.AddObserver(observer);
711}
712
713void RenderThreadImpl::RemoveObserver(RenderProcessObserver* observer) {
714  observers_.RemoveObserver(observer);
715}
716
717void RenderThreadImpl::SetResourceDispatcherDelegate(
718    ResourceDispatcherDelegate* delegate) {
719  resource_dispatcher()->set_delegate(delegate);
720}
721
722void RenderThreadImpl::EnsureWebKitInitialized() {
723  if (webkit_platform_support_)
724    return;
725
726  webkit_platform_support_.reset(new RendererWebKitPlatformSupportImpl);
727  blink::initialize(webkit_platform_support_.get());
728
729  const CommandLine& command_line = *CommandLine::ForCurrentProcess();
730
731  bool enable = command_line.HasSwitch(switches::kEnableThreadedCompositing);
732  if (enable) {
733#if defined(OS_ANDROID)
734    if (SynchronousCompositorFactory* factory =
735        SynchronousCompositorFactory::GetInstance())
736      compositor_message_loop_proxy_ =
737          factory->GetCompositorMessageLoop();
738#endif
739    if (!compositor_message_loop_proxy_.get()) {
740      compositor_thread_.reset(new base::Thread("Compositor"));
741      compositor_thread_->Start();
742#if defined(OS_ANDROID)
743      compositor_thread_->SetPriority(base::kThreadPriority_Display);
744#endif
745      compositor_message_loop_proxy_ =
746          compositor_thread_->message_loop_proxy();
747      compositor_message_loop_proxy_->PostTask(
748          FROM_HERE,
749          base::Bind(base::IgnoreResult(&ThreadRestrictions::SetIOAllowed),
750                     false));
751    }
752
753    InputHandlerManagerClient* input_handler_manager_client = NULL;
754#if defined(OS_ANDROID)
755    if (SynchronousCompositorFactory* factory =
756        SynchronousCompositorFactory::GetInstance()) {
757      input_handler_manager_client = factory->GetInputHandlerManagerClient();
758    }
759#endif
760    if (!input_handler_manager_client) {
761      input_event_filter_ =
762          new InputEventFilter(this, compositor_message_loop_proxy_);
763      AddFilter(input_event_filter_.get());
764      input_handler_manager_client = input_event_filter_.get();
765    }
766    input_handler_manager_.reset(
767        new InputHandlerManager(compositor_message_loop_proxy_,
768                                input_handler_manager_client));
769  }
770
771  scoped_refptr<base::MessageLoopProxy> output_surface_loop;
772  if (enable)
773    output_surface_loop = compositor_message_loop_proxy_;
774  else
775    output_surface_loop = base::MessageLoopProxy::current();
776
777  compositor_output_surface_filter_ =
778      CompositorOutputSurface::CreateFilter(output_surface_loop.get());
779  AddFilter(compositor_output_surface_filter_.get());
780
781  RenderThreadImpl::RegisterSchemes();
782
783  EnableBlinkPlatformLogChannels(
784      command_line.GetSwitchValueASCII(switches::kBlinkPlatformLogChannels));
785
786  SetRuntimeFeaturesDefaultsAndUpdateFromArgs(command_line);
787
788  if (!media::IsMediaLibraryInitialized()) {
789    WebRuntimeFeatures::enableMediaPlayer(false);
790    WebRuntimeFeatures::enableWebAudio(false);
791  }
792
793  FOR_EACH_OBSERVER(RenderProcessObserver, observers_, WebKitInitialized());
794
795  devtools_agent_message_filter_ = new DevToolsAgentFilter();
796  AddFilter(devtools_agent_message_filter_.get());
797
798  if (GetContentClient()->renderer()->RunIdleHandlerWhenWidgetsHidden())
799    ScheduleIdleHandler(kLongIdleHandlerDelayMs);
800
801  webkit::SetSharedMemoryAllocationFunction(AllocateSharedMemoryFunction);
802
803  // Limit use of the scaled image cache to when deferred image decoding
804  // is enabled.
805  // TODO(reveman): Allow use of this cache on Android once
806  // SkDiscardablePixelRef is used for decoded images. crbug.com/330041
807  bool use_skia_scaled_image_cache = false;
808#if !defined(OS_ANDROID)
809  use_skia_scaled_image_cache =
810      command_line.HasSwitch(switches::kEnableDeferredImageDecoding) ||
811      is_impl_side_painting_enabled_;
812#endif
813  if (!use_skia_scaled_image_cache)
814    SkGraphics::SetImageCacheByteLimit(0u);
815}
816
817void RenderThreadImpl::RegisterSchemes() {
818  // swappedout: pages should not be accessible, and should also
819  // be treated as empty documents that can commit synchronously.
820  WebString swappedout_scheme(base::ASCIIToUTF16(kSwappedOutScheme));
821  WebSecurityPolicy::registerURLSchemeAsDisplayIsolated(swappedout_scheme);
822  WebSecurityPolicy::registerURLSchemeAsEmptyDocument(swappedout_scheme);
823}
824
825void RenderThreadImpl::NotifyTimezoneChange() {
826  NotifyTimezoneChangeOnThisThread();
827  RenderThread::Get()->PostTaskToAllWebWorkers(
828      base::Bind(&NotifyTimezoneChangeOnThisThread));
829}
830
831void RenderThreadImpl::RecordAction(const base::UserMetricsAction& action) {
832  Send(new ViewHostMsg_UserMetricsRecordAction(action.str_));
833}
834
835void RenderThreadImpl::RecordComputedAction(const std::string& action) {
836  Send(new ViewHostMsg_UserMetricsRecordAction(action));
837}
838
839scoped_ptr<base::SharedMemory>
840    RenderThreadImpl::HostAllocateSharedMemoryBuffer(size_t size) {
841  if (size > static_cast<size_t>(std::numeric_limits<int>::max()))
842    return scoped_ptr<base::SharedMemory>();
843
844  base::SharedMemoryHandle handle;
845  bool success;
846  IPC::Message* message =
847      new ChildProcessHostMsg_SyncAllocateSharedMemory(size, &handle);
848
849  // Allow calling this from the compositor thread.
850  if (base::MessageLoop::current() == message_loop())
851    success = ChildThread::Send(message);
852  else
853    success = sync_message_filter()->Send(message);
854
855  if (!success)
856    return scoped_ptr<base::SharedMemory>();
857
858  if (!base::SharedMemory::IsHandleValid(handle))
859    return scoped_ptr<base::SharedMemory>();
860
861  return scoped_ptr<base::SharedMemory>(new base::SharedMemory(handle, false));
862}
863
864void RenderThreadImpl::RegisterExtension(v8::Extension* extension) {
865  WebScriptController::registerExtension(extension);
866}
867
868void RenderThreadImpl::ScheduleIdleHandler(int64 initial_delay_ms) {
869  idle_notification_delay_in_ms_ = initial_delay_ms;
870  idle_timer_.Stop();
871  idle_timer_.Start(FROM_HERE,
872      base::TimeDelta::FromMilliseconds(initial_delay_ms),
873      this, &RenderThreadImpl::IdleHandler);
874}
875
876void RenderThreadImpl::IdleHandler() {
877  bool run_in_foreground_tab = (widget_count_ > hidden_widget_count_) &&
878                               GetContentClient()->renderer()->
879                                   RunIdleHandlerWhenWidgetsHidden();
880  if (run_in_foreground_tab) {
881    IdleHandlerInForegroundTab();
882    return;
883  }
884
885  base::allocator::ReleaseFreeMemory();
886
887  // Continue the idle timer if the webkit shared timer is not suspended or
888  // something is left to do.
889  bool continue_timer = !webkit_shared_timer_suspended_;
890
891  if (!v8::V8::IdleNotification()) {
892    continue_timer = true;
893  }
894
895  // Schedule next invocation.
896  // Dampen the delay using the algorithm (if delay is in seconds):
897  //    delay = delay + 1 / (delay + 2)
898  // Using floor(delay) has a dampening effect such as:
899  //    1s, 1, 1, 2, 2, 2, 2, 3, 3, ...
900  // If the delay is in milliseconds, the above formula is equivalent to:
901  //    delay_ms / 1000 = delay_ms / 1000 + 1 / (delay_ms / 1000 + 2)
902  // which is equivalent to
903  //    delay_ms = delay_ms + 1000*1000 / (delay_ms + 2000).
904  // Note that idle_notification_delay_in_ms_ would be reset to
905  // kInitialIdleHandlerDelayMs in RenderThreadImpl::WidgetHidden.
906  if (continue_timer) {
907    ScheduleIdleHandler(idle_notification_delay_in_ms_ +
908                        1000000 / (idle_notification_delay_in_ms_ + 2000));
909
910  } else {
911    idle_timer_.Stop();
912  }
913
914  FOR_EACH_OBSERVER(RenderProcessObserver, observers_, IdleNotification());
915}
916
917void RenderThreadImpl::IdleHandlerInForegroundTab() {
918  // Increase the delay in the same way as in IdleHandler,
919  // but make it periodic by reseting it once it is too big.
920  int64 new_delay_ms = idle_notification_delay_in_ms_ +
921                       1000000 / (idle_notification_delay_in_ms_ + 2000);
922  if (new_delay_ms >= kLongIdleHandlerDelayMs)
923    new_delay_ms = kShortIdleHandlerDelayMs;
924
925  if (idle_notifications_to_skip_ > 0) {
926    idle_notifications_to_skip_--;
927  } else  {
928    int cpu_usage = 0;
929    Send(new ViewHostMsg_GetCPUUsage(&cpu_usage));
930    // Idle notification hint roughly specifies the expected duration of the
931    // idle pause. We set it proportional to the idle timer delay.
932    int idle_hint = static_cast<int>(new_delay_ms / 10);
933    if (cpu_usage < kIdleCPUUsageThresholdInPercents) {
934      base::allocator::ReleaseFreeMemory();
935      if (v8::V8::IdleNotification(idle_hint)) {
936        // V8 finished collecting garbage.
937        new_delay_ms = kLongIdleHandlerDelayMs;
938      }
939    }
940  }
941  ScheduleIdleHandler(new_delay_ms);
942}
943
944int64 RenderThreadImpl::GetIdleNotificationDelayInMs() const {
945  return idle_notification_delay_in_ms_;
946}
947
948void RenderThreadImpl::SetIdleNotificationDelayInMs(
949    int64 idle_notification_delay_in_ms) {
950  idle_notification_delay_in_ms_ = idle_notification_delay_in_ms;
951}
952
953void RenderThreadImpl::UpdateHistograms(int sequence_number) {
954  child_histogram_message_filter()->SendHistograms(sequence_number);
955}
956
957int RenderThreadImpl::PostTaskToAllWebWorkers(const base::Closure& closure) {
958  return WorkerTaskRunner::Instance()->PostTaskToAllThreads(closure);
959}
960
961bool RenderThreadImpl::ResolveProxy(const GURL& url, std::string* proxy_list) {
962  bool result = false;
963  Send(new ViewHostMsg_ResolveProxy(url, &result, proxy_list));
964  return result;
965}
966
967void RenderThreadImpl::PostponeIdleNotification() {
968  idle_notifications_to_skip_ = 2;
969}
970
971scoped_refptr<media::GpuVideoAcceleratorFactories>
972RenderThreadImpl::GetGpuFactories() {
973  DCHECK(IsMainThread());
974
975  scoped_refptr<GpuChannelHost> gpu_channel_host = GetGpuChannel();
976  const CommandLine* cmd_line = CommandLine::ForCurrentProcess();
977  scoped_refptr<media::GpuVideoAcceleratorFactories> gpu_factories;
978  scoped_refptr<base::MessageLoopProxy> media_loop_proxy =
979      GetMediaThreadMessageLoopProxy();
980  if (!cmd_line->HasSwitch(switches::kDisableAcceleratedVideoDecode)) {
981    if (!gpu_va_context_provider_ ||
982        gpu_va_context_provider_->DestroyedOnMainThread()) {
983      if (!gpu_channel_host) {
984        gpu_channel_host = EstablishGpuChannelSync(
985            CAUSE_FOR_GPU_LAUNCH_WEBGRAPHICSCONTEXT3DCOMMANDBUFFERIMPL_INITIALIZE);
986      }
987      blink::WebGraphicsContext3D::Attributes attributes;
988      bool lose_context_when_out_of_memory = false;
989      gpu_va_context_provider_ = ContextProviderCommandBuffer::Create(
990          make_scoped_ptr(
991              WebGraphicsContext3DCommandBufferImpl::CreateOffscreenContext(
992                  gpu_channel_host.get(),
993                  attributes,
994                  lose_context_when_out_of_memory,
995                  GURL("chrome://gpu/RenderThreadImpl::GetGpuVDAContext3D"),
996                  WebGraphicsContext3DCommandBufferImpl::SharedMemoryLimits(),
997                  NULL)),
998          "GPU-VideoAccelerator-Offscreen");
999    }
1000  }
1001  if (gpu_va_context_provider_) {
1002    gpu_factories = RendererGpuVideoAcceleratorFactories::Create(
1003        gpu_channel_host, media_loop_proxy, gpu_va_context_provider_);
1004  }
1005  return gpu_factories;
1006}
1007
1008scoped_ptr<WebGraphicsContext3DCommandBufferImpl>
1009RenderThreadImpl::CreateOffscreenContext3d() {
1010  blink::WebGraphicsContext3D::Attributes attributes;
1011  attributes.shareResources = true;
1012  attributes.depth = false;
1013  attributes.stencil = false;
1014  attributes.antialias = false;
1015  attributes.noAutomaticFlushes = true;
1016  bool lose_context_when_out_of_memory = true;
1017
1018  scoped_refptr<GpuChannelHost> gpu_channel_host(EstablishGpuChannelSync(
1019      CAUSE_FOR_GPU_LAUNCH_WEBGRAPHICSCONTEXT3DCOMMANDBUFFERIMPL_INITIALIZE));
1020  return make_scoped_ptr(
1021      WebGraphicsContext3DCommandBufferImpl::CreateOffscreenContext(
1022          gpu_channel_host.get(),
1023          attributes,
1024          lose_context_when_out_of_memory,
1025          GURL("chrome://gpu/RenderThreadImpl::CreateOffscreenContext3d"),
1026          WebGraphicsContext3DCommandBufferImpl::SharedMemoryLimits(),
1027          NULL));
1028}
1029
1030scoped_refptr<cc::ContextProvider>
1031RenderThreadImpl::OffscreenCompositorContextProvider() {
1032  DCHECK(IsMainThread());
1033
1034#if defined(OS_ANDROID)
1035  if (SynchronousCompositorFactory* factory =
1036      SynchronousCompositorFactory::GetInstance()) {
1037    if (compositor_message_loop_proxy_)
1038      return factory->GetOffscreenContextProviderForCompositorThread();
1039    return factory->GetOffscreenContextProviderForMainThread();
1040  }
1041#endif
1042
1043  if (!offscreen_compositor_contexts_.get() ||
1044      offscreen_compositor_contexts_->DestroyedOnMainThread()) {
1045    offscreen_compositor_contexts_ = ContextProviderCommandBuffer::Create(
1046        CreateOffscreenContext3d(),
1047        "Compositor-Offscreen");
1048  }
1049  return offscreen_compositor_contexts_;
1050}
1051
1052scoped_refptr<webkit::gpu::ContextProviderWebContext>
1053RenderThreadImpl::SharedMainThreadContextProvider() {
1054  DCHECK(IsMainThread());
1055#if defined(OS_ANDROID)
1056  if (SynchronousCompositorFactory* factory =
1057      SynchronousCompositorFactory::GetInstance())
1058    return factory->GetOffscreenContextProviderForMainThread();
1059#endif
1060
1061  if (!shared_main_thread_contexts_ ||
1062      shared_main_thread_contexts_->DestroyedOnMainThread()) {
1063    if (compositor_message_loop_proxy_) {
1064      // In threaded compositing mode, we have to create a new ContextProvider
1065      // to bind to the main thread since the compositor's is bound to the
1066      // compositor thread.
1067      shared_main_thread_contexts_ =
1068          ContextProviderCommandBuffer::Create(CreateOffscreenContext3d(),
1069                                               "Offscreen-MainThread");
1070    } else {
1071      // In single threaded mode, we can use the same context provider.
1072      shared_main_thread_contexts_ =
1073          static_cast<ContextProviderCommandBuffer*>(
1074                OffscreenCompositorContextProvider().get());
1075    }
1076  }
1077  if (shared_main_thread_contexts_ &&
1078      !shared_main_thread_contexts_->BindToCurrentThread())
1079    shared_main_thread_contexts_ = NULL;
1080  return shared_main_thread_contexts_;
1081}
1082
1083AudioRendererMixerManager* RenderThreadImpl::GetAudioRendererMixerManager() {
1084  if (!audio_renderer_mixer_manager_) {
1085    audio_renderer_mixer_manager_.reset(new AudioRendererMixerManager(
1086        GetAudioHardwareConfig()));
1087  }
1088
1089  return audio_renderer_mixer_manager_.get();
1090}
1091
1092media::AudioHardwareConfig* RenderThreadImpl::GetAudioHardwareConfig() {
1093  if (!audio_hardware_config_) {
1094    media::AudioParameters input_params;
1095    media::AudioParameters output_params;
1096    Send(new ViewHostMsg_GetAudioHardwareConfig(
1097        &input_params, &output_params));
1098
1099    audio_hardware_config_.reset(new media::AudioHardwareConfig(
1100        input_params, output_params));
1101    audio_message_filter_->SetAudioHardwareConfig(audio_hardware_config_.get());
1102  }
1103
1104  return audio_hardware_config_.get();
1105}
1106
1107base::WaitableEvent* RenderThreadImpl::GetShutdownEvent() {
1108  return ChildProcess::current()->GetShutDownEvent();
1109}
1110
1111#if defined(OS_WIN)
1112void RenderThreadImpl::PreCacheFontCharacters(const LOGFONT& log_font,
1113                                              const base::string16& str) {
1114  Send(new ViewHostMsg_PreCacheFontCharacters(log_font, str));
1115}
1116
1117void RenderThreadImpl::PreCacheFont(const LOGFONT& log_font) {
1118  Send(new ChildProcessHostMsg_PreCacheFont(log_font));
1119}
1120
1121void RenderThreadImpl::ReleaseCachedFonts() {
1122  Send(new ChildProcessHostMsg_ReleaseCachedFonts());
1123}
1124
1125#endif  // OS_WIN
1126
1127bool RenderThreadImpl::IsMainThread() {
1128  return !!current();
1129}
1130
1131base::MessageLoop* RenderThreadImpl::GetMainLoop() {
1132  return message_loop();
1133}
1134
1135scoped_refptr<base::MessageLoopProxy> RenderThreadImpl::GetIOLoopProxy() {
1136  return io_message_loop_proxy_;
1137}
1138
1139scoped_ptr<base::SharedMemory> RenderThreadImpl::AllocateSharedMemory(
1140    size_t size) {
1141  return scoped_ptr<base::SharedMemory>(
1142      HostAllocateSharedMemoryBuffer(size));
1143}
1144
1145int32 RenderThreadImpl::CreateViewCommandBuffer(
1146      int32 surface_id, const GPUCreateCommandBufferConfig& init_params) {
1147  TRACE_EVENT1("gpu",
1148               "RenderThreadImpl::CreateViewCommandBuffer",
1149               "surface_id",
1150               surface_id);
1151
1152  int32 route_id = MSG_ROUTING_NONE;
1153  IPC::Message* message = new GpuHostMsg_CreateViewCommandBuffer(
1154      surface_id,
1155      init_params,
1156      &route_id);
1157
1158  // Allow calling this from the compositor thread.
1159  thread_safe_sender()->Send(message);
1160
1161  return route_id;
1162}
1163
1164void RenderThreadImpl::CreateImage(
1165    gfx::PluginWindowHandle window,
1166    int32 image_id,
1167    const CreateImageCallback& callback) {
1168  NOTREACHED();
1169}
1170
1171void RenderThreadImpl::DeleteImage(int32 image_id, int32 sync_point) {
1172  NOTREACHED();
1173}
1174
1175scoped_ptr<gfx::GpuMemoryBuffer> RenderThreadImpl::AllocateGpuMemoryBuffer(
1176    size_t width,
1177    size_t height,
1178    unsigned internalformat) {
1179  DCHECK(allocate_gpu_memory_buffer_thread_checker_.CalledOnValidThread());
1180
1181  if (!GpuMemoryBufferImpl::IsFormatValid(internalformat))
1182    return scoped_ptr<gfx::GpuMemoryBuffer>();
1183
1184  gfx::GpuMemoryBufferHandle handle;
1185  bool success;
1186  IPC::Message* message =
1187      new ChildProcessHostMsg_SyncAllocateGpuMemoryBuffer(width,
1188                                                          height,
1189                                                          internalformat,
1190                                                          &handle);
1191
1192  // Allow calling this from the compositor thread.
1193  if (base::MessageLoop::current() == message_loop())
1194    success = ChildThread::Send(message);
1195  else
1196    success = sync_message_filter()->Send(message);
1197
1198  if (!success)
1199    return scoped_ptr<gfx::GpuMemoryBuffer>();
1200
1201  return GpuMemoryBufferImpl::Create(
1202      handle,
1203      gfx::Size(width, height),
1204      internalformat).PassAs<gfx::GpuMemoryBuffer>();
1205}
1206
1207void RenderThreadImpl::DoNotSuspendWebKitSharedTimer() {
1208  suspend_webkit_shared_timer_ = false;
1209}
1210
1211void RenderThreadImpl::DoNotNotifyWebKitOfModalLoop() {
1212  notify_webkit_of_modal_loop_ = false;
1213}
1214
1215void RenderThreadImpl::OnSetZoomLevelForCurrentURL(const std::string& scheme,
1216                                                   const std::string& host,
1217                                                   double zoom_level) {
1218  RenderViewZoomer zoomer(scheme, host, zoom_level);
1219  RenderView::ForEach(&zoomer);
1220}
1221
1222bool RenderThreadImpl::OnControlMessageReceived(const IPC::Message& msg) {
1223  ObserverListBase<RenderProcessObserver>::Iterator it(observers_);
1224  RenderProcessObserver* observer;
1225  while ((observer = it.GetNext()) != NULL) {
1226    if (observer->OnControlMessageReceived(msg))
1227      return true;
1228  }
1229
1230  // Some messages are handled by delegates.
1231  if (appcache_dispatcher_->OnMessageReceived(msg) ||
1232      dom_storage_dispatcher_->OnMessageReceived(msg) ||
1233      embedded_worker_dispatcher_->OnMessageReceived(msg)) {
1234    return true;
1235  }
1236
1237  bool handled = true;
1238  IPC_BEGIN_MESSAGE_MAP(RenderThreadImpl, msg)
1239    IPC_MESSAGE_HANDLER(ViewMsg_SetZoomLevelForCurrentURL,
1240                        OnSetZoomLevelForCurrentURL)
1241    // TODO(port): removed from render_messages_internal.h;
1242    // is there a new non-windows message I should add here?
1243    IPC_MESSAGE_HANDLER(ViewMsg_New, OnCreateNewView)
1244    IPC_MESSAGE_HANDLER(ViewMsg_PurgePluginListCache, OnPurgePluginListCache)
1245    IPC_MESSAGE_HANDLER(ViewMsg_NetworkStateChanged, OnNetworkStateChanged)
1246    IPC_MESSAGE_HANDLER(ViewMsg_TempCrashWithData, OnTempCrashWithData)
1247    IPC_MESSAGE_HANDLER(WorkerProcessMsg_CreateWorker, OnCreateNewSharedWorker)
1248    IPC_MESSAGE_HANDLER(ViewMsg_TimezoneChange, OnUpdateTimezone)
1249#if defined(OS_ANDROID)
1250    IPC_MESSAGE_HANDLER(ViewMsg_SetWebKitSharedTimersSuspended,
1251                        OnSetWebKitSharedTimersSuspended)
1252#endif
1253#if defined(OS_MACOSX)
1254    IPC_MESSAGE_HANDLER(ViewMsg_UpdateScrollbarTheme, OnUpdateScrollbarTheme)
1255#endif
1256    IPC_MESSAGE_UNHANDLED(handled = false)
1257  IPC_END_MESSAGE_MAP()
1258  return handled;
1259}
1260
1261void RenderThreadImpl::OnCreateNewView(const ViewMsg_New_Params& params) {
1262  EnsureWebKitInitialized();
1263  // When bringing in render_view, also bring in webkit's glue and jsbindings.
1264  RenderViewImpl::Create(params.opener_route_id,
1265                         params.renderer_preferences,
1266                         params.web_preferences,
1267                         params.view_id,
1268                         params.main_frame_routing_id,
1269                         params.surface_id,
1270                         params.session_storage_namespace_id,
1271                         params.frame_name,
1272                         false,
1273                         params.swapped_out,
1274                         params.hidden,
1275                         params.next_page_id,
1276                         params.screen_info,
1277                         params.accessibility_mode);
1278}
1279
1280GpuChannelHost* RenderThreadImpl::EstablishGpuChannelSync(
1281    CauseForGpuLaunch cause_for_gpu_launch) {
1282  TRACE_EVENT0("gpu", "RenderThreadImpl::EstablishGpuChannelSync");
1283
1284  if (gpu_channel_.get()) {
1285    // Do nothing if we already have a GPU channel or are already
1286    // establishing one.
1287    if (!gpu_channel_->IsLost())
1288      return gpu_channel_.get();
1289
1290    // Recreate the channel if it has been lost.
1291    gpu_channel_ = NULL;
1292  }
1293
1294  // Ask the browser for the channel name.
1295  int client_id = 0;
1296  IPC::ChannelHandle channel_handle;
1297  gpu::GPUInfo gpu_info;
1298  if (!Send(new GpuHostMsg_EstablishGpuChannel(cause_for_gpu_launch,
1299                                               &client_id,
1300                                               &channel_handle,
1301                                               &gpu_info)) ||
1302#if defined(OS_POSIX)
1303      channel_handle.socket.fd == -1 ||
1304#endif
1305      channel_handle.name.empty()) {
1306    // Otherwise cancel the connection.
1307    return NULL;
1308  }
1309
1310  GetContentClient()->SetGpuInfo(gpu_info);
1311
1312  // Cache some variables that are needed on the compositor thread for our
1313  // implementation of GpuChannelHostFactory.
1314  io_message_loop_proxy_ = ChildProcess::current()->io_message_loop_proxy();
1315
1316  gpu_channel_ = GpuChannelHost::Create(
1317      this, gpu_info, channel_handle,
1318      ChildProcess::current()->GetShutDownEvent());
1319  return gpu_channel_.get();
1320}
1321
1322blink::WebMediaStreamCenter* RenderThreadImpl::CreateMediaStreamCenter(
1323    blink::WebMediaStreamCenterClient* client) {
1324#if defined(OS_ANDROID)
1325  if (CommandLine::ForCurrentProcess()->HasSwitch(
1326      switches::kDisableWebRTC))
1327    return NULL;
1328#endif
1329
1330#if defined(ENABLE_WEBRTC)
1331  if (!media_stream_center_) {
1332    media_stream_center_ = GetContentClient()->renderer()
1333        ->OverrideCreateWebMediaStreamCenter(client);
1334    if (!media_stream_center_) {
1335      scoped_ptr<MediaStreamCenter> media_stream_center(
1336          new MediaStreamCenter(client, GetMediaStreamDependencyFactory()));
1337      AddObserver(media_stream_center.get());
1338      media_stream_center_ = media_stream_center.release();
1339    }
1340  }
1341#endif
1342  return media_stream_center_;
1343}
1344
1345MediaStreamDependencyFactory*
1346RenderThreadImpl::GetMediaStreamDependencyFactory() {
1347  return media_stream_factory_.get();
1348}
1349
1350GpuChannelHost* RenderThreadImpl::GetGpuChannel() {
1351  if (!gpu_channel_.get())
1352    return NULL;
1353
1354  if (gpu_channel_->IsLost())
1355    return NULL;
1356
1357  return gpu_channel_.get();
1358}
1359
1360void RenderThreadImpl::OnPurgePluginListCache(bool reload_pages) {
1361  EnsureWebKitInitialized();
1362  // The call below will cause a GetPlugins call with refresh=true, but at this
1363  // point we already know that the browser has refreshed its list, so disable
1364  // refresh temporarily to prevent each renderer process causing the list to be
1365  // regenerated.
1366  webkit_platform_support_->set_plugin_refresh_allowed(false);
1367  blink::resetPluginCache(reload_pages);
1368  webkit_platform_support_->set_plugin_refresh_allowed(true);
1369
1370  FOR_EACH_OBSERVER(RenderProcessObserver, observers_, PluginListChanged());
1371}
1372
1373void RenderThreadImpl::OnNetworkStateChanged(bool online) {
1374  EnsureWebKitInitialized();
1375  WebNetworkStateNotifier::setOnLine(online);
1376  FOR_EACH_OBSERVER(RenderProcessObserver, observers_,
1377      NetworkStateChanged(online));
1378}
1379
1380void RenderThreadImpl::OnTempCrashWithData(const GURL& data) {
1381  GetContentClient()->SetActiveURL(data);
1382  CHECK(false);
1383}
1384
1385void RenderThreadImpl::OnUpdateTimezone() {
1386  NotifyTimezoneChange();
1387}
1388
1389
1390#if defined(OS_ANDROID)
1391void RenderThreadImpl::OnSetWebKitSharedTimersSuspended(bool suspend) {
1392  if (suspend_webkit_shared_timer_) {
1393    EnsureWebKitInitialized();
1394    if (suspend) {
1395      webkit_platform_support_->SuspendSharedTimer();
1396    } else {
1397      webkit_platform_support_->ResumeSharedTimer();
1398    }
1399    webkit_shared_timer_suspended_ = suspend;
1400  }
1401}
1402#endif
1403
1404#if defined(OS_MACOSX)
1405void RenderThreadImpl::OnUpdateScrollbarTheme(
1406    float initial_button_delay,
1407    float autoscroll_button_delay,
1408    bool jump_on_track_click,
1409    blink::ScrollerStyle preferred_scroller_style,
1410    bool redraw) {
1411  EnsureWebKitInitialized();
1412  static_cast<WebScrollbarBehaviorImpl*>(
1413      webkit_platform_support_->scrollbarBehavior())->set_jump_on_track_click(
1414          jump_on_track_click);
1415  blink::WebScrollbarTheme::updateScrollbars(initial_button_delay,
1416                                             autoscroll_button_delay,
1417                                             preferred_scroller_style,
1418                                             redraw);
1419}
1420#endif
1421
1422void RenderThreadImpl::OnCreateNewSharedWorker(
1423    const WorkerProcessMsg_CreateWorker_Params& params) {
1424  // EmbeddedSharedWorkerStub will self-destruct.
1425  new EmbeddedSharedWorkerStub(params.url,
1426                               params.name,
1427                               params.content_security_policy,
1428                               params.security_policy_type,
1429                               params.route_id);
1430}
1431
1432void RenderThreadImpl::OnMemoryPressure(
1433    base::MemoryPressureListener::MemoryPressureLevel memory_pressure_level) {
1434  base::allocator::ReleaseFreeMemory();
1435
1436  if (memory_pressure_level ==
1437      base::MemoryPressureListener::MEMORY_PRESSURE_CRITICAL) {
1438    // Trigger full v8 garbage collection on critical memory notification.
1439    v8::V8::LowMemoryNotification();
1440    // Clear the image cache.
1441    blink::WebImageCache::clear();
1442    // Purge Skia font cache, by setting it to 0 and then again to the previous
1443    // limit.
1444    size_t font_cache_limit = SkGraphics::SetFontCacheLimit(0);
1445    SkGraphics::SetFontCacheLimit(font_cache_limit);
1446  } else {
1447    // Otherwise trigger a couple of v8 GCs using IdleNotification.
1448    if (!v8::V8::IdleNotification())
1449      v8::V8::IdleNotification();
1450  }
1451}
1452
1453scoped_refptr<base::MessageLoopProxy>
1454RenderThreadImpl::GetFileThreadMessageLoopProxy() {
1455  DCHECK(message_loop() == base::MessageLoop::current());
1456  if (!file_thread_) {
1457    file_thread_.reset(new base::Thread("Renderer::FILE"));
1458    file_thread_->Start();
1459  }
1460  return file_thread_->message_loop_proxy();
1461}
1462
1463scoped_refptr<base::MessageLoopProxy>
1464RenderThreadImpl::GetMediaThreadMessageLoopProxy() {
1465  DCHECK(message_loop() == base::MessageLoop::current());
1466  if (!media_thread_) {
1467    media_thread_.reset(new base::Thread("Media"));
1468    media_thread_->Start();
1469
1470#if defined(OS_ANDROID)
1471    renderer_demuxer_ = new RendererDemuxerAndroid();
1472    AddFilter(renderer_demuxer_.get());
1473#endif
1474  }
1475  return media_thread_->message_loop_proxy();
1476}
1477
1478void RenderThreadImpl::SetFlingCurveParameters(
1479    const std::vector<float>& new_touchpad,
1480    const std::vector<float>& new_touchscreen) {
1481  webkit_platform_support_->SetFlingCurveParameters(new_touchpad,
1482                                                    new_touchscreen);
1483
1484}
1485
1486void RenderThreadImpl::SampleGamepads(blink::WebGamepads* data) {
1487  if (!gamepad_shared_memory_reader_)
1488    gamepad_shared_memory_reader_.reset(new GamepadSharedMemoryReader);
1489  gamepad_shared_memory_reader_->SampleGamepads(*data);
1490}
1491
1492void RenderThreadImpl::WidgetCreated() {
1493  widget_count_++;
1494}
1495
1496void RenderThreadImpl::WidgetDestroyed() {
1497  widget_count_--;
1498}
1499
1500void RenderThreadImpl::WidgetHidden() {
1501  DCHECK_LT(hidden_widget_count_, widget_count_);
1502  hidden_widget_count_++;
1503
1504  if (widget_count_ && hidden_widget_count_ == widget_count_) {
1505#if !defined(SYSTEM_NATIVELY_SIGNALS_MEMORY_PRESSURE)
1506    // TODO(vollick): Remove this this heavy-handed approach once we're polling
1507    // the real system memory pressure.
1508    base::MemoryPressureListener::NotifyMemoryPressure(
1509        base::MemoryPressureListener::MEMORY_PRESSURE_MODERATE);
1510#endif
1511    if (GetContentClient()->renderer()->RunIdleHandlerWhenWidgetsHidden())
1512      ScheduleIdleHandler(kInitialIdleHandlerDelayMs);
1513  }
1514}
1515
1516void RenderThreadImpl::WidgetRestored() {
1517  DCHECK_GT(hidden_widget_count_, 0);
1518  hidden_widget_count_--;
1519
1520  if (!GetContentClient()->renderer()->RunIdleHandlerWhenWidgetsHidden()) {
1521    return;
1522  }
1523
1524  ScheduleIdleHandler(kLongIdleHandlerDelayMs);
1525}
1526
1527}  // namespace content
1528