Feed audio constraints over to WebRtcLocalAudioTrack

content/renderer/media/media_stream_dependency_factory.h

Index: content/renderer/media/media_stream_dependency_factory.h
diff --git a/content/renderer/media/media_stream_dependency_factory.h b/content/renderer/media/media_stream_dependency_factory.h
index 720ecb063d737ddcbdc072dc699a4b93dca468e5..c89f274a6c099d41d67a4b1a83acfbfd81892881 100644
--- a/content/renderer/media/media_stream_dependency_factory.h
+++ b/content/renderer/media/media_stream_dependency_factory.h
@@ -42,6 +42,7 @@ namespace content {
 
 class IpcNetworkManager;
 class IpcPacketSocketFactory;
+class RTCMediaConstraints;
 class VideoCaptureImplManager;
 class WebRtcAudioCapturer;
 class WebRtcAudioDeviceImpl;
@@ -161,14 +162,19 @@ class CONTENT_EXPORT MediaStreamDependencyFactory
   // specific for a WebAudio source. The created WebAudioCapturerSource
   // instance will function as audio source instead of the default
   // WebRtcAudioCapturer.
+  // The |constraints| will be modified to include the default, mandatory
+  // WebAudio constraints.
   virtual scoped_refptr<WebRtcAudioCapturer> CreateWebAudioSource(
-      WebKit::WebMediaStreamSource* source);
+      WebKit::WebMediaStreamSource* source,
+      RTCMediaConstraints* constraints);
 
   // Asks the PeerConnection factory to create a Local AudioTrack object.
   virtual scoped_refptr<webrtc::AudioTrackInterface>
-      CreateLocalAudioTrack(const std::string& id,
-                            const scoped_refptr<WebRtcAudioCapturer>& capturer,
-                            webrtc::AudioSourceInterface* source);
+      CreateLocalAudioTrack(
+          const std::string& id,
+          const scoped_refptr<WebRtcAudioCapturer>& capturer,
+          webrtc::AudioSourceInterface* source,
+          const webrtc::MediaConstraintsInterface* constraints);
 
   // Asks the PeerConnection factory to create a Local VideoTrack object.
   virtual scoped_refptr<webrtc::VideoTrackInterface>