R=chase@chromium.org,szager@chromium.org,maruel@chromium.org
BUG=157398
Review URL: https://codereview.chromium.org/11262004

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@164026 0039d316-1c4b-4281-b951-d872f2087c98