Make RTPHeaderParser skip over unknown RTP header extensions rather than bail out.

BUG=2954
R=mflodman@webrtc.org, stefan@webrtc.org, xians@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/10399004

git-svn-id: http://webrtc.googlecode.com/svn/trunk/webrtc@5786 4adac7df-926f-26a2-2b94-8c16560cd09d
2 files changed