Hollow out the to-be-deleted classes to avoid the massive duplication of code going on in this patch. The old types should extend the new types and where that isn't possible, the old type should be rewritten as a delegate.
Anything in the rebind or **/impl packages can be a straight move. They're not public types. http://gwt-code-reviews.appspot.com/1383808/ -- http://groups.google.com/group/Google-Web-Toolkit-Contributors
