Add a 'remote' property to MediaSourceInterface. Also adding an implementation to the relevant sour…

talk/app/webrtc/localaudiosource.h

Index: talk/app/webrtc/localaudiosource.h
diff --git a/talk/app/webrtc/localaudiosource.h b/talk/app/webrtc/localaudiosource.h
index 557745b8b832be9f56c1f0f624a9267e99d43a9c..091df8a044693f4e605f10281cd3abbdcac06b4c 100644
--- a/talk/app/webrtc/localaudiosource.h
+++ b/talk/app/webrtc/localaudiosource.h
@@ -48,16 +48,14 @@ class LocalAudioSource : public Notifier<AudioSourceInterface> {
       const PeerConnectionFactoryInterface::Options& options,
       const MediaConstraintsInterface* constraints);
 
-  virtual SourceState state() const { return source_state_; }
+  SourceState state() const override { return source_state_; }
+  bool remote() const override { return false; }
+
   virtual const cricket::AudioOptions& options() const { return options_; }
 
  protected:
-  LocalAudioSource()
-      : source_state_(kInitializing) {
-  }
-
-  ~LocalAudioSource() {
-  }
+  LocalAudioSource() : source_state_(kInitializing) {}
+  ~LocalAudioSource() override {}
 
  private:
   void Initialize(const PeerConnectionFactoryInterface::Options& options,