Added check in page click tracker to ensure events passed in are mouse events
Added check in page click tracker to ensure events passed in are mouse events

BUG=61255
TEST=None

Review URL: http://codereview.chromium.org/4120011

git-svn-id: http://src.chromium.org/svn/trunk/src@64510 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 04054b49470eb4f965bbcdad42ab144864262a5d
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