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.cc

@@ -207,6 +207,14 @@ VCMFrameBuffer::Reset() {
     VCMEncodedFrame::Reset();
 }
 
+void
+VCMFrameBuffer::ClearStateIfIncomplete() {
+  if (_state == kStateDecodable) {
+    _state = kStateIncomplete;
+    _sessionInfo.ClearStateIfIncomplete();
+  }
+}
+
 // Set state of frame
 void
 VCMFrameBuffer::SetState(VCMFrameBufferStateEnum state) {