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

content/renderer/media/mock_media_stream_dependency_factory.cc

Index: content/renderer/media/mock_media_stream_dependency_factory.cc
diff --git a/content/renderer/media/mock_media_stream_dependency_factory.cc b/content/renderer/media/mock_media_stream_dependency_factory.cc
index 0167712949dbc7e74db2f2a2c5ea23c1d2a4fd59..3babbe97501cf08016f7101f97975f2847ea494d 100644
--- a/content/renderer/media/mock_media_stream_dependency_factory.cc
+++ b/content/renderer/media/mock_media_stream_dependency_factory.cc
@@ -348,6 +348,16 @@ MockMediaStreamDependencyFactory::CreateVideoSource(
   return last_video_source_;
 }
 
+bool MockMediaStreamDependencyFactory::InitializeAudioSource(
+  const StreamDeviceInfo& device_info) {
+  return true;
+}
+
+bool MockMediaStreamDependencyFactory::CreateWebAudioSource(
+    WebKit::WebMediaStreamSource* source) {
+  return true;
+}
+
 scoped_refptr<webrtc::LocalMediaStreamInterface>
 MockMediaStreamDependencyFactory::CreateLocalMediaStream(
     const std::string& label) {
@@ -391,7 +401,4 @@ MockMediaStreamDependencyFactory::CreateIceCandidate(
   return new MockIceCandidate(sdp_mid, sdp_mline_index, sdp);
 }
 
-void MockMediaStreamDependencyFactory::SetAudioDeviceSessionId(int session_id) {
-}
-
 }  // namespace content