plumbing for skia trace events into Chrome's about://tracing framework

content/renderer/render_thread_impl.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/renderer/render_thread_impl.h"
 
 #include <algorithm>
 #include <limits>
 #include <map>
 #include <vector>
@@ skipping 76 matching lines @@
 #include "content/renderer/service_worker/embedded_worker_dispatcher.h"
 #include "grit/content_resources.h"
 #include "ipc/ipc_channel_handle.h"
 #include "ipc/ipc_forwarding_message_filter.h"
 #include "ipc/ipc_platform_file.h"
 #include "media/base/audio_hardware_config.h"
 #include "media/base/media.h"
 #include "media/filters/gpu_video_accelerator_factories.h"
 #include "net/base/net_errors.h"
 #include "net/base/net_util.h"
+#include "skia/ext/event_tracer_impl.h"
 #include "third_party/WebKit/public/platform/WebString.h"
 #include "third_party/WebKit/public/web/WebColorName.h"
 #include "third_party/WebKit/public/web/WebDatabase.h"
 #include "third_party/WebKit/public/web/WebDocument.h"
 #include "third_party/WebKit/public/web/WebFrame.h"
 #include "third_party/WebKit/public/web/WebImageCache.h"
 #include "third_party/WebKit/public/web/WebKit.h"
 #include "third_party/WebKit/public/web/WebNetworkStateNotifier.h"
 #include "third_party/WebKit/public/web/WebPopupMenu.h"
 #include "third_party/WebKit/public/web/WebRuntimeFeatures.h"
@@ skipping 266 matching lines @@
 
   midi_message_filter_ = new MidiMessageFilter(GetIOMessageLoopProxy());
   AddFilter(midi_message_filter_.get());
 
   AddFilter((new IndexedDBMessageFilter(thread_safe_sender()))->GetFilter());
 
   AddFilter((new EmbeddedWorkerContextMessageFilter())->GetFilter());
 
   GetContentClient()->renderer()->RenderThreadStarted();
 
+  InitSkiaEventTracer();
+
   const CommandLine& command_line = *CommandLine::ForCurrentProcess();
   if (command_line.HasSwitch(switches::kEnableGpuBenchmarking))
       RegisterExtension(GpuBenchmarkingExtension::Get());
 
   // Note that under Linux, the media library will normally already have
   // been initialized by the Zygote before this instance became a Renderer.
   base::FilePath media_path;
   PathService::Get(DIR_MEDIA_LIBS, &media_path);
   if (!media_path.empty())
     media::InitializeMediaLibrary(media_path);
@@ skipping 1015 matching lines @@
   hidden_widget_count_--;
 
   if (!GetContentClient()->renderer()->RunIdleHandlerWhenWidgetsHidden()) {
     return;
   }
 
   ScheduleIdleHandler(kLongIdleHandlerDelayMs);
 }
 
 }  // namespace content