Added new policy delegate callback to get the filename - this
	won't be up to the content policy any more.

        * WebView.subproj/WebControllerPolicyDelegate.h:
        * WebView.subproj/WebDefaultPolicyDelegate.m:
        (-[WebDefaultPolicyDelegate saveFilenameForResponse:andRequest:]):
        * WebView.subproj/WebMainResourceClient.m:
        (-[WebMainResourceClient handle:didReceiveResponse:]):

WebBrowser:

	Added new policy delegate callback to get the filename - this
	won't be up to the content policy any more.

        * BrowserWebController.m:
        (-[BrowserWebController contentPolicyForResponse:andRequest:inFrame:withContentPolicy:]):
        (-[BrowserWebController saveFilenameForResponse:andRequest:]):


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@2621 268f45cc-cd09-0410-ab3c-d52691b4dbfc