Improve UiBinder+CssResource compile speed by caching results of GenerateCssAst.exec()

Patch by: bobv
Review by: rjrjr

git-svn-id: https://google-web-toolkit.googlecode.com/svn/trunk@6504 8db76d5a-ed1c-0410-87a9-c151d255dfc7
3 files changed