GitLab

ScreenRecorder::Stop() need a done task to indicate it is actually paused.
This is needed so that we can shutdown threads safely.

BUG=69997
TEST=remoting_unittests --gtest_filter=ScreenRecorder.*

Review URL: http://codereview.chromium.org/6282006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@72188 0039d316-1c4b-4281-b951-d872f2087c98