Revert 3181 - Fixes two bugs related to padding in the jitter buffer.

- Pad packets (empty) were often NACKed even though they were received.
- Padding only frames (empty) didn't properly update the decoding state,
  and would therefore be NACKed even though they were received.

Broke [Builder Win32Debug] (http://webrtc-cb-linux-master.cbf.corp.google.com:8010/builders/Win32Debug/builds/1728)

TEST=trybots

BUG=1150

Review URL: https://webrtc-codereview.appspot.com/966026

TBR=stefan@webrtc.org
Review URL: https://webrtc-codereview.appspot.com/939031

git-svn-id: http://webrtc.googlecode.com/svn/trunk@3182 4adac7df-926f-26a2-2b94-8c16560cd09d

webrtc/modules/video_coding/main/source/generic_decoder.cc

@@ -185,8 +185,7 @@ WebRtc_Word32 VCMGenericDecoder::Decode(const VCMEncodedFrame& frame,
         _callback->Pop(frame.TimeStamp());
     }
     // Update the key frame decoded variable so that we know whether or not we've decoded a key frame since reset.
-    _keyFrameDecoded = (_keyFrameDecoded ||
-        frame.FrameType() == kVideoFrameKey);
+    _keyFrameDecoded = (frame.FrameType() == kVideoFrameKey || frame.FrameType() == kVideoFrameGolden);
     return ret;
 }