Fixes issue 1357 For each browser, computes client size correctly in the presence of a) Standards/Quirks mode b) Scrollbars/no scrollbars. Review by:knorton git-svn-id: https://google-web-toolkit.googlecode.com/svn/trunk@1528 8db76d5a-ed1c-0410-87a9-c151d255dfc7