GitLab

This class uses GDataContactsService to download contacts
from Google and uses ContactDatabase to save them to disk.
It also contains logic for periodically refreshing contacts.

BUG=128805
TEST=none
TBR=ben@chromium.org

Review URL: https://chromiumcodereview.appspot.com/10829144

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@149805 0039d316-1c4b-4281-b951-d872f2087c98