PeerConnection(java): replace ScopedLocalRef with ScopedLocalRefFrame and fix a local reference leak in OnMessage.

Hopefully the approach of pushing/popping frames will be easier to avoid messing up than remembering to annotate every single local reference with a ScopedLocalRef.

BUG=2761
R=wu@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/6729004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@5355 4adac7df-926f-26a2-2b94-8c16560cd09d
1 file changed