chromeos: Send callback also on keyup and click when selecting language/network in OOBE

BUG=chromium-os:25498
TEST=On OOBE, select language by mouse or keyboard (open the list by pressing enter, select with arrow keys, commit the selection with enter).


Review URL: http://codereview.chromium.org/9864056

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@129584 0039d316-1c4b-4281-b951-d872f2087c98