Reviewed by Tim Hatcher.
- fix <rdar://problem/5206089> REGRESSION: hovering over amazon.com "product categories" tab makes page content disappear The contentWindow property was doing a cross-frame security check, but it shouldn't. Window objects are responsible for protecting themselves from cross-frame activity. Because contentWindow returned undefined, we then ended up setting visibility on the body of the main frame to "hidden". No layout test yet. When we make cross-domain tests, we should include this one. * html/HTMLFrameElement.idl: Removed CheckFrameSecurity attribute from contentWindow. * html/HTMLIFrameElement.idl: Ditto. git-svn-id: http://svn.webkit.org/repository/webkit/trunk@21646 268f45cc-cd09-0410-ab3c-d52691b4dbfc