Change hosted.html to get its gwt.hosted parameter from the outer frame rather
than munging the URL to pass it there.

Patch by: jat
Review by: jgw (desk review)
Suggested by: scottb


git-svn-id: https://google-web-toolkit.googlecode.com/svn/trunk@4210 8db76d5a-ed1c-0410-87a9-c151d255dfc7