R=akuegel@chromium.org, pgervais@chromium.org
BUG=472612, 503068

Review URL: https://codereview.chromium.org/1200863002

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@295818 0039d316-1c4b-4281-b951-d872f2087c98