Ensure that enum types reachable through AutoBean method parameterizations are included in the EnumMap.
Patch by: bobv
Review by: jbrosenberg

Review at http://gwt-code-reviews.appspot.com/1240801


git-svn-id: https://google-web-toolkit.googlecode.com/svn/trunk@9482 8db76d5a-ed1c-0410-87a9-c151d255dfc7