Ensures that WebRTC works for device selection using a different sample rate than default

content/renderer/media/media_stream_source_extra_data.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_MEDIA_MEDIA_STREAM_SOURCE_EXTRA_DATA_H_
 #define CONTENT_RENDERER_MEDIA_MEDIA_STREAM_SOURCE_EXTRA_DATA_H_
 
 #include "base/compiler_specific.h"
 #include "content/common/content_export.h"
 #include "content/common/media/media_stream_options.h"
+#include "media/base/audio_capturer_source.h"
 #include "third_party/libjingle/source/talk/app/webrtc/videosourceinterface.h"
 #include "third_party/WebKit/Source/Platform/chromium/public/WebMediaStreamSource.h"
 
 namespace content {
 
 class CONTENT_EXPORT MediaStreamSourceExtraData
     : NON_EXPORTED_BASE(public WebKit::WebMediaStreamSource::ExtraData) {
  public:
+
   explicit MediaStreamSourceExtraData(
       const StreamDeviceInfo& device_info);
+  explicit MediaStreamSourceExtraData(
+      media::AudioCapturerSource* source);
   virtual ~MediaStreamSourceExtraData();
 
   // Return device information about the camera or microphone.
   const StreamDeviceInfo& device_info() const {
     return device_info_;
   }
 
   void SetVideoSource(webrtc::VideoSourceInterface* source) {
     video_source_ = source;
   }
 
   webrtc::VideoSourceInterface* video_source() { return video_source_; }
+  media::AudioCapturerSource* audio_source() { return audio_source_; }
 
  private:
   StreamDeviceInfo device_info_;
   scoped_refptr<webrtc::VideoSourceInterface> video_source_;
+  scoped_refptr<media::AudioCapturerSource> audio_source_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaStreamSourceExtraData);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_MEDIA_MEDIA_STREAM_SOURCE_EXTRA_DATA_H_