Re-roll r10106 "Re-architect how overrides are handled."

This was broken on the final prune because CastNormalizer with -XdisableCastChecking was removing type information from the AST (fixed in r10111).

Review by: jbrosenberg@google.com

git-svn-id: https://google-web-toolkit.googlecode.com/svn/trunk@10141 8db76d5a-ed1c-0410-87a9-c151d255dfc7
19 files changed