Fixing a bug in ResizeLayoutPanel where moving the scroll bars triggers a scroll event on older versions of Safari, which causes an infinite loop.
http://gwt-code-reviews.appspot.com/1314801

Review by: pdr@google.com

git-svn-id: https://google-web-toolkit.googlecode.com/svn/trunk@9586 8db76d5a-ed1c-0410-87a9-c151d255dfc7