Fix webrtcAudioPrivate API to handle requests from <webview>s.

content/browser/renderer_host/render_view_host_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_BROWSER_RENDERER_HOST_RENDER_VIEW_HOST_IMPL_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_VIEW_HOST_IMPL_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 150 matching lines @@
   SiteInstanceImpl* GetSiteInstance() const override;
   bool IsRenderViewLive() const override;
   void NotifyMoveOrResizeStarted() override;
   void SetWebUIProperty(const std::string& name,
                         const std::string& value) override;
   void Zoom(PageZoom zoom) override;
   void SyncRendererPrefs() override;
   WebPreferences GetWebkitPreferences() override;
   void UpdateWebkitPreferences(const WebPreferences& prefs) override;
   void OnWebkitPreferencesChanged() override;
-  void GetAudioOutputControllers(
-      const GetAudioOutputControllersCallback& callback) const override;
   void SelectWordAroundCaret() override;
 
 #if defined(OS_ANDROID)
   virtual void ActivateNearestFindResult(int request_id,
                                          float x,
                                          float y) override;
   virtual void RequestFindMatchRects(int current_version) override;
 #endif
 
   void set_delegate(RenderViewHostDelegate* d) {
@@ skipping 281 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(RenderViewHostImpl);
 };
 
 #if defined(COMPILER_MSVC)
 #pragma warning(pop)
 #endif
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_VIEW_HOST_IMPL_H_