Added logic for kSelectiveErrors to VCMJitterBuffer and corresponding unit tests.

R=marpan@google.com, mikhal@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/1943004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@4503 4adac7df-926f-26a2-2b94-8c16560cd09d

webrtc/modules/video_coding/main/source/frame_buffer.h

@@ -83,6 +83,12 @@ class VCMFrameBuffer : public VCMEncodedFrame {
   // them.
   int NotDecodablePackets() const;
 
+  // If _state is kStateDecodable, changes it to kStateIncomplete.
+  // Used by the dual decoder. After the mode is changed to kNoErrors from
+  // kWithErrors or kSelective errors, any states that have been marked
+  // decodable and are not complete are marked as non-decodable.
+  void ClearStateIfIncomplete();
+
  private:
   void SetState(VCMFrameBufferStateEnum state);  // Set state of frame