Depends on https://codereview.chromium.org/1906323003

BUG=chromium:605919

Review URL: https://codereview.chromium.org/1915463002

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@300184 0039d316-1c4b-4281-b951-d872f2087c98