R=iannucci@chromium.org,hinoka@chromium.org,mark@chromium.org
BUG=

Review URL: https://codereview.chromium.org/431003002

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@287057 0039d316-1c4b-4281-b951-d872f2087c98