Update talk to 50918584.

Together with Stefan's http://review.webrtc.org/1960004/.

R=mallinath@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/2048004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@4556 4adac7df-926f-26a2-2b94-8c16560cd09d

webrtc/video_engine/vie_network_impl.h

@@ -37,16 +37,6 @@ class ViENetworkImpl
                                  const void* data,
                                  const int length);
   virtual int SetMTU(int video_channel, unsigned int mtu);
-  virtual int SetPacketTimeoutNotification(const int video_channel,
-                                           bool enable,
-                                           int timeout_seconds);
-  virtual int RegisterObserver(const int video_channel,
-                               ViENetworkObserver& observer);
-  virtual int DeregisterObserver(const int video_channel);
-  virtual int SetPeriodicDeadOrAliveStatus(
-      const int video_channel,
-      const bool enable,
-      const unsigned int sample_time_seconds);
 
  protected:
   explicit ViENetworkImpl(ViESharedData* shared_data);