Plumb render view ID from audio-related code in renderer through IPCs to AudioRendererHost in brows…

content/renderer/media/media_stream_dependency_factory.cc

 // 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.
 
 #include "content/renderer/media/media_stream_dependency_factory.h"
 
 #include <vector>
 
 #include "base/synchronization/waitable_event.h"
 #include "base/utf_string_conversions.h"
@@ skipping 180 matching lines @@
 
   MediaStreamExtraData* extra_data =
       static_cast<MediaStreamExtraData*>(description->extraData());
   extra_data->SetLocalStreamStopCallback(stream_stop);
   return true;
 }
 
 bool MediaStreamDependencyFactory::CreatePeerConnectionFactory() {
   if (!pc_factory_.get()) {
     DCHECK(!audio_device_);
-    audio_device_ = new WebRtcAudioDeviceImpl();
+    // TODO(miu): Some significant refactoring work is needed to support a
+    // separate WebRtcAudioDevice per render view.  For now, here's a stub:
+    static const int kUnknownRenderViewId = -1;
+    audio_device_ = new WebRtcAudioDeviceImpl(kUnknownRenderViewId);
     scoped_refptr<webrtc::PeerConnectionFactoryInterface> factory(
         webrtc::CreatePeerConnectionFactory(worker_thread_,
                                             signaling_thread_,
                                             audio_device_));
     if (factory.get())
       pc_factory_ = factory.release();
   }
   return pc_factory_.get() != NULL;
 }
 
@@ skipping 167 matching lines @@
           base::Unretained(this)));
       // Stopping the thread will wait until all tasks have been
       // processed before returning. We wait for the above task to finish before
       // letting the the function continue to avoid any potential race issues.
       chrome_worker_thread_.Stop();
     } else {
       NOTREACHED() << "Worker thread not running.";
     }
   }
 }