This is needed to ensure that it resolves to a correct URL on Gitiles.

R=maruel@chromium.org, smut@google.com

Review URL: https://codereview.chromium.org/1225713002

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@295932 0039d316-1c4b-4281-b951-d872f2087c98