Don't let an exception escape if we can't decode cookies.  Future work to
support non-encoding of cookies is  captured in issue 3566.

Issue: 1633
Patch by: jat
Review by: jgw (desk)


git-svn-id: https://google-web-toolkit.googlecode.com/svn/trunk@5254 8db76d5a-ed1c-0410-87a9-c151d255dfc7