Record Chrome trace events in tcmalloc heap profiles

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 29 matching lines @@
 namespace win {
 class ScopedCOMInitializer;
 }
 #endif
 }
 
 namespace cc {
 class ContextProvider;
 }
 
+namespace debug {
+class TraceMemoryTraceLogObserver;
+}
+
 namespace IPC {
 class ForwardingMessageFilter;
 }
 
 namespace media {
 class AudioHardwareConfig;
 }
 
 namespace v8 {
 class Extension;
@@ skipping 392 matching lines @@
 
   class GpuVDAContextLostCallback;
   scoped_ptr<GpuVDAContextLostCallback> context_lost_cb_;
   scoped_ptr<WebGraphicsContext3DCommandBufferImpl> gpu_vda_context3d_;
 
   scoped_ptr<AudioRendererMixerManager> audio_renderer_mixer_manager_;
   scoped_ptr<media::AudioHardwareConfig> audio_hardware_config_;
 
   HistogramCustomizer histogram_customizer_;
 
+  // Observes trace events being enabled for memory tracking.
+  scoped_ptr<base::debug::TraceMemoryTraceLogObserver> trace_memory_observer_;
+
   DISALLOW_COPY_AND_ASSIGN(RenderThreadImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_RENDER_THREAD_IMPL_H_