Revert r5294 to re-roll r5293.

To fix races in test each stream now owns its own encoder/decoder.

R=mflodman@webrtc.org
BUG=

Review URL: https://webrtc-codereview.appspot.com/5919004

git-svn-id: http://webrtc.googlecode.com/svn/trunk/webrtc@5297 4adac7df-926f-26a2-2b94-8c16560cd09d
19 files changed