Add V8 heap statistics in a time-line manner in tracing.

content/renderer/render_thread_impl.h

 // 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.
 
 #ifndef CONTENT_RENDERER_RENDER_THREAD_IMPL_H_
 #define CONTENT_RENDERER_RENDER_THREAD_IMPL_H_
 
 #include <set>
 #include <string>
 #include <vector>
@@ skipping 80 matching lines @@
 class MediaStreamCenter;
 class MemoryObserver;
 class PeerConnectionDependencyFactory;
 class MidiMessageFilter;
 class NetInfoDispatcher;
 class P2PSocketDispatcher;
 class PeerConnectionTracker;
 class RendererDemuxerAndroid;
 class RendererWebKitPlatformSupportImpl;
 class RenderProcessObserver;
+class V8HeapStatisticsMonitor;
 class VideoCaptureImplManager;
 class WebGraphicsContext3DCommandBufferImpl;
 class WebRTCIdentityService;
 
 // The RenderThreadImpl class represents a background thread where RenderView
 // instances live.  The RenderThread supports an API that is used by its
 // consumer to talk indirectly to the RenderViews and supporting objects.
 // Likewise, it provides an API for the RenderViews to talk back to the main
 // process (i.e., their corresponding WebContentsImpl).
 //
@@ skipping 81 matching lines @@
   }
   void set_layout_test_mode(bool layout_test_mode) {
     layout_test_mode_ = layout_test_mode;
   }
 
   RendererWebKitPlatformSupportImpl* webkit_platform_support() const {
     DCHECK(webkit_platform_support_);
     return webkit_platform_support_.get();
   }
 
+  V8HeapStatisticsMonitor* v8_heap_statistics_monitor() {
+    return v8_heap_statistics_monitor_.get();
+  }
+
   IPC::ForwardingMessageFilter* compositor_output_surface_filter() const {
     return compositor_output_surface_filter_.get();
   }
 
   InputHandlerManager* input_handler_manager() const {
     return input_handler_manager_.get();
   }
 
   // Will be NULL if threaded compositing has not been enabled.
   scoped_refptr<base::MessageLoopProxy> compositor_message_loop_proxy() const {
@@ skipping 299 matching lines @@
   // The number of idle handler calls that skip sending idle notifications.
   int idle_notifications_to_skip_;
 
   bool suspend_webkit_shared_timer_;
   bool notify_webkit_of_modal_loop_;
   bool webkit_shared_timer_suspended_;
 
   // The following flag is used to control layout test specific behavior.
   bool layout_test_mode_;
 
+  scoped_ptr<V8HeapStatisticsMonitor> v8_heap_statistics_monitor_;
+
   // Timer that periodically calls IdleHandler.
   base::RepeatingTimer<RenderThreadImpl> idle_timer_;
 
   // The channel from the renderer process to the GPU process.
   scoped_refptr<GpuChannelHost> gpu_channel_;
 
   // Cache of variables that are needed on the compositor thread by
   // GpuChannelHostFactory methods.
   scoped_refptr<base::MessageLoopProxy> io_message_loop_proxy_;
 
@@ skipping 50 matching lines @@
   bool is_one_copy_enabled_;
 
   std::map<int, mojo::MessagePipeHandle> pending_render_frame_connects_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderThreadImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_RENDER_THREAD_IMPL_H_