in the way <http://code.google.com/p/chromium/wiki/UsingNewGit#Initial_checkout>
describes.

R=maruel@chromium.org
TEST=gclient sync with safesync_url is faster.
BUG=109184


Review URL: http://codereview.chromium.org/9379005

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@121988 0039d316-1c4b-4281-b951-d872f2087c98