R=agable@chromium.org, dnj@chromium.org, vadimsh@chromium.org
BUG=409167

Review URL: https://codereview.chromium.org/521583008

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@291744 0039d316-1c4b-4281-b951-d872f2087c98