MediaStream API: Moving Add/Remove track from WebMediaStreamCenterClient to WebMediaStream
Simple cleanup that makes the API cleaner.

BUG=

Review URL: https://codereview.chromium.org/13844006

git-svn-id: svn://svn.chromium.org/blink/trunk@148371 bbb929c8-8fbe-4397-9dbb-9b2b20218538
9 files changed