http://bugzilla.opendarwin.org/show_bug.cgi?id=8442
        Bug 8442: improvements to Cocoa bindings support in WebView - code simplification

        Removes the WebController class added earlier; changes NSTreeController and 
        WebView to together without it. Now you can just bind the contentObject binding
        of the tree controller directly to the mainFrameDocument key of the WebView.

        * WebCoreSupport/WebFrameBridge.m:
        (-[WebFrameBridge windowObjectCleared]):
        * WebView/WebDataSource.m:
        (-[WebDataSource _setTitle:]):
        * WebView/WebFrame.m:
        (-[WebFrame _closeOldDataSources]):
        * WebView/WebView.m:
        (-[WebView _progressStarted:]):
        (-[WebView _finalProgressComplete]):
        (-[WebView _commonInitializationWithFrameName:groupName:]):
        (-[WebView setMainFrameDocumentReady:]):
        (-[WebView mainFrameDocument]):
        * WebView/WebViewPrivate.h:



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@13980 268f45cc-cd09-0410-ab3c-d52691b4dbfc