Implement keyDown events the GTK layout tests.
Implement keyDown events the GTK layout tests.

Review URL: http://codereview.chromium.org/11460


git-svn-id: http://src.chromium.org/svn/trunk/src@5651 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 1ebe0652171fad311bbec718b2903edcbe019ea5
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