Donald Curtis d4f769d8fc Stop video candidates getting down to audio.
Second attempt at adding a check to make sure that the video
transportproxy doesn't send down candidates to the audio transport
channel when things are bundled.

BUG=4665
R=juberti@google.com, pthatcher@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/50059004

Cr-Commit-Position: refs/heads/master@{#9316}
2015-05-28 16:48:30 +00:00
..
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2015-05-28 11:40:00 +00:00
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