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/session_info.h

@@ -65,6 +65,13 @@ class VCMSessionInfo {
   // memory to remove any empty space.
   // Returns the number of bytes deleted from the session.
   int MakeDecodable();
+
+  // Sets decodable_ to false.
+  // 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();
+
   int SessionLength() const;
   int NumPackets() const;
   bool HaveFirstPacket() const;