Update MediaStreamTrack::Stop to latest draft.

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 730ae2a9f495076e6abf5fbc31fc22d890b74cc4..2374d53ce696888703f5e2a395b15664cfdc5830 100644
--- a/content/renderer/media/media_stream_dependency_factory.h
+++ b/content/renderer/media/media_stream_dependency_factory.h
@@ -179,7 +179,8 @@ class CONTENT_EXPORT MediaStreamDependencyFactory
   // it reuses existing capture if any; otherwise it creates a new capturer.
   virtual scoped_refptr<WebRtcAudioCapturer> CreateAudioCapturer(
       int render_view_id, const StreamDeviceInfo& device_info,
-      const blink::WebMediaConstraints& constraints);
+      const blink::WebMediaConstraints& constraints,
+      MediaStreamAudioSource* audio_source);
 
   // Adds the audio device as a sink to the audio track and starts the local
   // audio track. This is virtual for test purposes since no real audio device