Test case being added in https://codereview.chromium.org/1984623002/

NOTICE:
* Only patches from the webrtc/ subdirectory in a standalone
WebRTC checkout will work, since the root is set to src/third_party.
This can be changed once http://crbug.com/611808 is fixed. 
* The Chromium checkout will be synced to the DEPS-pinned revision
of WebRTC. Changing this to HEAD will be addressed in a future CL.
BUG=438952

Review-Url: https://codereview.chromium.org/1976243002

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@300588 0039d316-1c4b-4281-b951-d872f2087c98