- improve handling of plug-ins when the WebView or a superview is hidden with -[NSView setHidden]

        * Plugins.subproj/WebBaseNetscapePluginView.m: (-[WebBaseNetscapePluginView saveAndSetPortStateForUpdate:]):
        Add "hidden" to the list of reasons to clip out all plug-in drawing.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@9832 268f45cc-cd09-0410-ab3c-d52691b4dbfc