DOMUI: Stub out List.activateItemAtIndex for lists that don't implement this method.
DOMUI: Stub out List.activateItemAtIndex for lists that don't implement this
method.

BUG=none
TEST=none

Review URL: http://codereview.chromium.org/6203004

git-svn-id: http://src.chromium.org/svn/trunk/src@71128 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 7c416e36ece9d0cf89cb4d0d71341dca75e26663
meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser