Part 1: Plumb render view ID to render host

content/renderer/media/media_stream_dependency_factory.cc

Index: content/renderer/media/media_stream_dependency_factory.cc
diff --git a/content/renderer/media/media_stream_dependency_factory.cc b/content/renderer/media/media_stream_dependency_factory.cc
index f607c8d778f790b21a1ab072478a3a437c40428c..0a786e13733b639d7c9619ca486aa81a42109601 100644
--- a/content/renderer/media/media_stream_dependency_factory.cc
+++ b/content/renderer/media/media_stream_dependency_factory.cc
@@ -74,6 +74,7 @@ MediaStreamDependencyFactory::MediaStreamDependencyFactory(
 MediaStreamDependencyFactory::~MediaStreamDependencyFactory() {}
 
 bool MediaStreamDependencyFactory::CreatePeerConnectionFactory(
+    int render_view_id,
     talk_base::Thread* worker_thread,
     talk_base::Thread* signaling_thread,
     content::P2PSocketDispatcher* socket_dispatcher,
@@ -87,10 +88,11 @@ bool MediaStreamDependencyFactory::CreatePeerConnectionFactory(
             socket_factory);
 
     talk_base::scoped_refptr<webrtc::PeerConnectionFactoryInterface> factory(
-        webrtc::CreatePeerConnectionFactory(worker_thread,
-                                            signaling_thread,
-                                            pa_factory.release(),
-                                            new WebRtcAudioDeviceImpl()));
+        webrtc::CreatePeerConnectionFactory(
+            worker_thread,
+            signaling_thread,
+            pa_factory.release(),
+            new WebRtcAudioDeviceImpl(render_view_id)));
     if (factory.get())
       pc_factory_ = factory.release();
   }