R=dhsharp@chromium.org, vadimsh@chromium.org
BUG=538454

Review URL: https://codereview.chromium.org/1498163002

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@297848 0039d316-1c4b-4281-b951-d872f2087c98