Part 1: Plumb render view ID to render host

content/renderer/media/webrtc_audio_device_impl.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/webrtc_audio_device_impl.h"
 
 #include "base/bind.h"
 #include "base/metrics/histogram.h"
 #include "base/string_util.h"
 #include "base/win/windows_version.h"
@@ skipping 110 matching lines @@
     // Report unexpected sample rates using a unique histogram name.
     if (dir == kAudioOutput) {
       UMA_HISTOGRAM_COUNTS("WebRTC.AudioOutputFramesPerBufferUnexpected",
                            param);
     } else {
       UMA_HISTOGRAM_COUNTS("WebRTC.AudioInputFramesPerBufferUnexpected", param);
     }
   }
 }
 
-WebRtcAudioDeviceImpl::WebRtcAudioDeviceImpl()
+WebRtcAudioDeviceImpl::WebRtcAudioDeviceImpl(int render_view_id)
     : ref_count_(0),
       render_loop_(base::MessageLoopProxy::current()),
       audio_transport_callback_(NULL),
       input_delay_ms_(0),
       output_delay_ms_(0),
       last_error_(AudioDeviceModule::kAdmErrNone),
       last_process_time_(base::TimeTicks::Now()),
       session_id_(0),
       bytes_per_sample_(0),
       initialized_(false),
       playing_(false),
       recording_(false),
       agc_is_enabled_(false) {
   DVLOG(1) << "WebRtcAudioDeviceImpl::WebRtcAudioDeviceImpl()";
   // TODO(henrika): remove this restriction when factory is used for the
   // input side as well.
   DCHECK(RenderThreadImpl::current()) <<
       "WebRtcAudioDeviceImpl must be constructed on the render thread";
-  audio_output_device_ = AudioDeviceFactory::NewOutputDevice();
+  audio_output_device_ = AudioDeviceFactory::NewOutputDevice(render_view_id);
   DCHECK(audio_output_device_);
 }
 
 WebRtcAudioDeviceImpl::~WebRtcAudioDeviceImpl() {
   DVLOG(1) << "WebRtcAudioDeviceImpl::~WebRtcAudioDeviceImpl()";
   if (playing_)
     StopPlayout();
   if (recording_)
     StopRecording();
   if (initialized_)
@@ skipping 1007 matching lines @@
 }
 
 int32_t WebRtcAudioDeviceImpl::GetLoudspeakerStatus(bool* enabled) const {
   NOTIMPLEMENTED();
   return -1;
 }
 
 void WebRtcAudioDeviceImpl::SetSessionId(int session_id) {
   session_id_ = session_id;
 }