GitLab

This is based on a suggestion from derat@ at
http://codereview.chromium.org/10808108/

Reference:
http://code.google.com/apis/accounts/docs/OAuth2WebServer.html

BUG=none
TEST=out/Release/unit_tests --gtest_filter='GData*'

Review URL: https://chromiumcodereview.appspot.com/10827018

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@148540 0039d316-1c4b-4281-b951-d872f2087c98