Fixing VCM tests for VP8

Removing asserts since the PictureID (and other parameters)
is now piped through codecSpecific. Also made sure the VCM
send callbacks (test code) copies the appropriate paramters.
Finally, enabling I420 in tests.

Review URL: http://webrtc-codereview.appspot.com/137022

git-svn-id: http://webrtc.googlecode.com/svn/trunk@553 4adac7df-926f-26a2-2b94-8c16560cd09d

src/modules/video_coding/main/test/generic_codec_test.cc

@@ -580,8 +580,5 @@ VCMEncComplete_KeyReqTest::SendData(
     _timeStamp += 3000;
     rtpInfo.type.Video.isFirstPacket = false;
     rtpInfo.frameType = kVideoFrameKey;
-    // TODO(hlundin): Remove assert once we've piped PictureID into VCM
-    // through the WebRtcRTPHeader.
-    assert(rtpInfo.type.Video.codec != kRTPVideoVP8);
     return _vcm.IncomingPacket(payloadData, payloadSize, rtpInfo);
 }