Fix heap-use-after-free issue with WebAudioCapturerSource.

content/renderer/media/webrtc/peer_connection_dependency_factory.cc

 // Copyright 2014 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/peer_connection_dependency_factory.h"
 
 #include <vector>
 
 #include "base/command_line.h"
 #include "base/strings/utf_string_conversions.h"
@@ skipping 486 matching lines @@
   // it is the first audio track connecting to the capturer.
   audio_track->Start();
 }
 
 scoped_refptr<WebAudioCapturerSource>
 PeerConnectionDependencyFactory::CreateWebAudioSource(
     blink::WebMediaStreamSource* source) {
   DVLOG(1) << "PeerConnectionDependencyFactory::CreateWebAudioSource()";
 
   scoped_refptr<WebAudioCapturerSource>
-      webaudio_capturer_source(new WebAudioCapturerSource());
+      webaudio_capturer_source(new WebAudioCapturerSource(*source));
   MediaStreamAudioSource* source_data = new MediaStreamAudioSource();
 
   // Use the current default capturer for the WebAudio track so that the
   // WebAudio track can pass a valid delay value and |need_audio_processing|
   // flag to PeerConnection.
   // TODO(xians): Remove this after moving APM to Chrome.
   if (GetWebRtcAudioDevice()) {
     source_data->SetAudioCapturer(
         GetWebRtcAudioDevice()->GetDefaultCapturer());
   }
@@ skipping 125 matching lines @@
 }
 
 void PeerConnectionDependencyFactory::EnsureWebRtcAudioDeviceImpl() {
   if (audio_device_.get())
     return;
 
   audio_device_ = new WebRtcAudioDeviceImpl();
 }
 
 }  // namespace content