MediaStream API: Removing deprecating APIs
The corresponding Chromium patch (https://codereview.chromium.org/19627003/)
removing the usage of these APIs is currently cooking in the commit queue.

BUG=

Review URL: https://chromiumcodereview.appspot.com/19482026

git-svn-id: svn://svn.chromium.org/blink/trunk@154907 bbb929c8-8fbe-4397-9dbb-9b2b20218538