commit 8dde01dd64c6baf0cf86572e753c3f562c4d60b6
author perkj <perkj@webrtc.org> Wed Mar 23 07:33:56 2016
committer Commit bot <commit-bot@chromium.org> Wed Mar 23 07:34:01 2016
tree c74866173117223a9961067aa88df65df265424e
parent 9a604fe691c0917fd616e3d02f1b6effe1b44553

Propagate MediaStreamSource state to video tracks the same way as audio.
Also removes unused track states kLive and kFailed.
Since this also required a Video source to exist in all unit tests that create a track, a FakeVideoTrackSource is added and used in tests.

BUG=webrtc:5426

Review URL: https://codereview.webrtc.org/1790633002

Cr-Original-Commit-Position: refs/heads/master@{#12098}
Cr-Mirrored-From: https://chromium.googlesource.com/external/webrtc
Cr-Mirrored-Commit: c8f952deaae5eccadf218bb0300ee49b50a87ce8