[cros] Cache the URL of user's G+ profile photo to prevent redundant downloads.


BUG=126736
TEST=Manual


Review URL: https://chromiumcodereview.appspot.com/10667034

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@144169 0039d316-1c4b-4281-b951-d872f2087c98
5 files changed