Implement writing mic audio input data to file for debugging purposes.

content/browser/renderer_host/render_process_host_impl.h

Index: content/browser/renderer_host/render_process_host_impl.h
diff --git a/content/browser/renderer_host/render_process_host_impl.h b/content/browser/renderer_host/render_process_host_impl.h
index e6c2f8252948449b90a0b1f7d43e5a91eae238f9..8eff7f60ecfaaf98bfefced20d29ed0f64011b8f 100644
--- a/content/browser/renderer_host/render_process_host_impl.h
+++ b/content/browser/renderer_host/render_process_host_impl.h
@@ -46,6 +46,7 @@ class ChannelMojoHost;
 }
 
 namespace content {
+class AudioInputRendererHost;
 class AudioRendererHost;
 class BluetoothDispatcherHost;
 class BrowserCdmManager;
@@ -136,8 +137,8 @@ class CONTENT_EXPORT RenderProcessHostImpl
   void ResumeRequestsForView(int route_id) override;
   void FilterURL(bool empty_allowed, GURL* url) override;
 #if defined(ENABLE_WEBRTC)
-  void EnableAecDump(const base::FilePath& file) override;
-  void DisableAecDump() override;
+  void EnableAudioDebugRecordings(const base::FilePath& file) override;
+  void DisableAudioDebugRecordings() override;
   void SetWebRtcLogMessageCallback(
       base::Callback<void(const std::string&)> callback) override;
   WebRtcStopRtpDumpCallback StartRtpDump(
@@ -342,6 +343,7 @@ class CONTENT_EXPORT RenderProcessHostImpl
   void SendAecDumpFileToRenderer(int id,
                                  IPC::PlatformFileForTransit file_for_transit);
   void SendDisableAecDumpToRenderer();
+  base::FilePath GetAecDumpFilePathWithExtensions(const base::FilePath& file);
 #endif
 
   scoped_ptr<MojoApplicationHost> mojo_application_host_;
@@ -448,6 +450,8 @@ class CONTENT_EXPORT RenderProcessHostImpl
 
   scoped_refptr<AudioRendererHost> audio_renderer_host_;
 
+  scoped_refptr<AudioInputRendererHost> audio_input_renderer_host_;
+
   scoped_refptr<BluetoothDispatcherHost> bluetooth_dispatcher_host_;
 
 #if defined(OS_ANDROID)