Fixes issue 3474.  If a method in an async RPC interface
returns a Request or a RequestBuilder, previously ProxyCreator
would generate uncompiling code.  Now, such methods always
return a Request or RequestBuilder, albeit sometimes a dummy
stand-in object that always fails.

Review by: jat, scottb, bruce



git-svn-id: https://google-web-toolkit.googlecode.com/svn/releases/1.6@5023 8db76d5a-ed1c-0410-87a9-c151d255dfc7
13 files changed