Rollback of support for touch/gesture events due to test failures.

Original review here:
Review at http://gwt-code-reviews.appspot.com/867801

Review by: ahumesky@google.com

git-svn-id: https://google-web-toolkit.googlecode.com/svn/trunk@9185 8db76d5a-ed1c-0410-87a9-c151d255dfc7