Enables wrapping of un-serializable exceptions in web mode.

Fixes issue 7847

Change-Id: Ida5ff71be9eb5c0076b367935d13b267b2a9ca3c
Review-Link: https://gwt-review.googlesource.com/#/c/1890/


git-svn-id: https://google-web-toolkit.googlecode.com/svn/trunk@11511 8db76d5a-ed1c-0410-87a9-c151d255dfc7
2 files changed