Pass mime type instead of full response to content policy delegate
	method, in preparation for merging it with the file URL policy.

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

WebBrowser:

	Pass mime type instead of full response to content policy delegate
	method, in preparation for merging it with the file URL policy.

        * BrowserWebController.m:
        (-[BrowserWebController contentPolicyForMIMEType:andRequest:inFrame:]):


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@2662 268f45cc-cd09-0410-ab3c-d52691b4dbfc