Fix threading and cleanup issues on Collider
Address Peter's comments.
For Peter's comments.
Merge branch 'master' of https://github.com/GoogleChrome/webrtc
Move timer handler to room.
Fix goroutine leak and style issues
Merge pull request #198 from jiayliu/master

Fix threading and room cleanup issues on Collider
Merge remote-tracking branch 'origin/master' into apprtc-refactor3