Make navigation policy asynchronous for real.

        * WebKit.pbproj/project.pbxproj:
        * WebView.subproj/WebControllerPolicyDelegate.h:
        * WebView.subproj/WebControllerPolicyDelegate.m:
        (-[WebPolicyDecisionListenerPrivate initWithTarget:action:]):
        (-[WebPolicyDecisionListenerPrivate dealloc]):
        (-[WebPolicyDecisionListener usePolicy:]):
        (-[WebPolicyDecisionListener _initWithTarget:action:]):
        (-[WebPolicyDecisionListener dealloc]):
        (-[WebPolicyDecisionListener _invalidate]):
        * WebView.subproj/WebControllerPolicyDelegatePrivate.h: Added.
        * WebView.subproj/WebDefaultPolicyDelegate.m:
        (-[WebDefaultPolicyDelegate decideNavigationPolicyForAction:andRequest:inFrame:decisionListener:]):
        * WebView.subproj/WebFrame.m:
        (-[WebFrame stopLoading]):
        * WebView.subproj/WebFramePrivate.h:
        * WebView.subproj/WebFramePrivate.m:
        (-[WebFramePrivate dealloc]):
        (-[WebFrame _invalidatePendingPolicyDecisionCallingDefaultAction:]):
        (-[WebFrame _checkNavigationPolicyForRequest:dataSource:andCall:withSelector:]):
        (-[WebFrame _continueAfterNavigationPolicy:]):
        (-[WebFrame _loadURL:loadType:triggeringEvent:isFormSubmission:]):
        (-[WebFrame _loadDataSource:withLoadType:]):

WebBrowser:

	Make navigation policy asynchronous.

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


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@2688 268f45cc-cd09-0410-ab3c-d52691b4dbfc