GitLab

Also extended the testserver's device_management.py handler to serve these
requests.

BUG=chromium-os:23063
TEST=unit_tests and browser_tests all pass


Review URL: http://codereview.chromium.org/8741014

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@113009 0039d316-1c4b-4281-b951-d872f2087c98