video_coding: Checking/updating seq num for an old packet regardless of size.

Review URL: http://webrtc-codereview.appspot.com/330028

git-svn-id: http://webrtc.googlecode.com/svn/trunk@1318 4adac7df-926f-26a2-2b94-8c16560cd09d

src/modules/video_coding/main/source/decoding_state.h

@@ -34,8 +34,9 @@ class VCMDecodingState {
   // Set the decoding state one frame back.
   void SetStateOneBack(const VCMFrameBuffer* frame);
   // Update the sequence number if the timestamp matches current state and the
-  // packet is of zero size.
-  void UpdateZeroSizePacket(const VCMPacket* packet);
+  // sequence number is higher than the current one. This accounts for packets
+  // arriving late.
+  void UpdateOldPacket(const VCMPacket* packet);
   void SetSeqNum(uint16_t new_seq_num);
   void Reset();
   uint32_t time_stamp() const;