This allow using "fetch ios_internal" to setup a repository for Chrome
on iOS (this still requires being a Google employee as this fetch a
private downstream repository).

The repository URL was already public as it is in every public bug that
is linked from a downstream CL, e.g. http://crbug.com/459705#c115.

BUG=None

Review-Url: https://codereview.chromium.org/2028413004

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@300689 0039d316-1c4b-4281-b951-d872f2087c98