Getting rid of AudioHardwareConfig and its synchronous IPC.

content/browser/renderer_host/render_message_filter.h

Index: content/browser/renderer_host/render_message_filter.h
diff --git a/content/browser/renderer_host/render_message_filter.h b/content/browser/renderer_host/render_message_filter.h
index fa55e9442975309d3693651e0fe86dfdc66b67e9..591f7825ce53176583898f11c53838af75f8694d 100644
--- a/content/browser/renderer_host/render_message_filter.h
+++ b/content/browser/renderer_host/render_message_filter.h
@@ -115,8 +115,6 @@ class CONTENT_EXPORT RenderMessageFilter : public BrowserMessageFilter {
   void OnDestruct() const override;
   void OverrideThreadForMessage(const IPC::Message& message,
                                 BrowserThread::ID* thread) override;
-  base::TaskRunner* OverrideTaskRunnerForMessage(
-      const IPC::Message& message) override;
 
   int render_process_id() const { return render_process_id_; }
 
@@ -146,9 +144,6 @@ class CONTENT_EXPORT RenderMessageFilter : public BrowserMessageFilter {
 
   void OnGenerateRoutingID(int* route_id);
 
-  void OnGetAudioHardwareConfig(media::AudioParameters* input_params,
-                                media::AudioParameters* output_params);
-
   // Message handlers called on the browser IO thread:
   void OnEstablishGpuChannel(CauseForGpuLaunch, IPC::Message* reply);
   void OnHasGpuProcess(IPC::Message* reply);