Split out audio debug recording from RenderProcessHostImpl.

content/renderer/render_thread_impl.h

Index: content/renderer/render_thread_impl.h
diff --git a/content/renderer/render_thread_impl.h b/content/renderer/render_thread_impl.h
index 19ee30bd3c84be6c545fa63f6050f87d52ba60b4..9ae524de2fe389ce53617e5d90e8feace943d4f8 100644
--- a/content/renderer/render_thread_impl.h
+++ b/content/renderer/render_thread_impl.h
@@ -87,6 +87,7 @@ namespace content {
 
 class AppCacheDispatcher;
 class AecDumpMessageFilter;
+class AudioDebugRecorder;
 class AudioInputMessageFilter;
 class AudioMessageFilter;
 class AudioRendererMixerManager;
@@ -557,10 +558,14 @@ class CONTENT_EXPORT RenderThreadImpl
   // Used on the render thread.
   scoped_ptr<VideoCaptureImplManager> vc_manager_;
 
-  // Used for communicating registering AEC dump consumers with the browser and
-  // receving AEC dump file handles when AEC dump is enabled. An AEC dump is
-  // diagnostic audio data for WebRTC stored locally when enabled by the user in
+  // Used for communicating registering audio debug recording consumers with the
+  // browser and receving audio debug recording file handles when audio debug
+  // recording is enabled. An audio debug recording file is diagnostic audio
+  // data for WebRTC stored locally when enabled by the user in
   // chrome://webrtc-internals.
+  scoped_refptr<AudioDebugRecorder> audio_debug_recorder_;
+
+  // Used for WebRTC event log.
   scoped_refptr<AecDumpMessageFilter> aec_dump_message_filter_;
 
   // The count of RenderWidgets running through this thread.