Fixed race condition in media_stream_infobar.py.


BUG=
NOTRY=true


Review URL: https://chromiumcodereview.appspot.com/10832084

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@149401 0039d316-1c4b-4281-b951-d872f2087c98
3 files changed