Only remove encoder state feedback for send channels.

BUG=1000
TEST=See bug

Review URL: https://webrtc-codereview.appspot.com/938004

git-svn-id: http://webrtc.googlecode.com/svn/trunk/webrtc@2994 4adac7df-926f-26a2-2b94-8c16560cd09d
diff --git a/video_engine/vie_encoder.h b/video_engine/vie_encoder.h
index 339390f..ea552bf 100644
--- a/video_engine/vie_encoder.h
+++ b/video_engine/vie_encoder.h
@@ -152,6 +152,7 @@
   // Disables recording of debugging information.
   virtual int StopDebugRecording();
 
+  int channel_id() const { return channel_id_; }
  protected:
   // Called by BitrateObserver.
   void OnNetworkChanged(const uint32_t bitrate_bps,