- moved frame traversal logic from WebFrame to WebBridge
	http://bugzilla.opendarwin.org/show_bug.cgi?id=6341

	To do this, I had to invert the ownership so that WebBridge now
	owns WebFrame instead of vice versa. As a result, WebView now owns
	a WebBridge pointer and does not have a direct WebFrame pointer.

        * WebCoreSupport.subproj/WebBridge.h:
        * WebCoreSupport.subproj/WebBridge.m:
        (-[WebBridge initWithFrameName:view:]): The initializer is now responsible for creating
	the frame, so pass it what it needs to do that.
        (-[WebBridge dealloc]): The bridge now owns the frame, so release it.
        (-[WebBridge close]): ditto
        (-[WebBridge firstChild]): Moved from WebFrame
        (-[WebBridge lastChild]): ditto
        (-[WebBridge childCount]): ditto
        (-[WebBridge previousSibling]): ditto
        (-[WebBridge nextSibling]): ditto
        (-[WebBridge isDescendantOfFrame:]): ditto
        (-[WebBridge traverseNextFrameStayWithin:]): ditto
        (-[WebBridge appendChild:]): ditto
        (-[WebBridge removeChild:]): ditto
        * WebView.subproj/WebFrame.m:
        (-[WebFrame _removeChild::]): Call WebBridge version
        (-[WebFramePrivate dealloc]): ditto
        (-[WebFrame _firstChildFrame]): ditto
        (-[WebFrame _lastChildFrame]): ditto
        (-[WebFrame _childFrameCount]): ditto
        (-[WebFrame _previousSiblingFrame]): ditto
        (-[WebFrame _nextSiblingFrame]): ditto
        (-[WebFrame _traverseNextFrameStayWithin:]): ditto
        (-[WebFrame _appendChild:]): ditto
        (-[WebFrame _removeChild:]): ditto
        (-[WebFrame _isDescendantOfFrame:]): ditto,
        (-[WebFrame _detachFromParent]): reorder a bit to avoid losing our bridge
	pointer before the bridge is due to release us, and don't release the
	bridge any more since it now owns us
        (-[WebFrame _initWithName:webFrameView:webView:bridge:]): new initializer,
	we no longer create the bridge, instead it is passed in
        (-[WebFrame initWithName:webFrameView:webView:]): Call the new designated
	initializer, but this method is no longer viable and should be deprecated.
        * WebView.subproj/WebFrameInternal.h:

	* WebView.subproj/WebView.m: WebView was changed to hold onto
	the WebBridge for the main frame instead of the WebFrame.

        (-[WebViewPrivate dealloc]): update for the fact that we hold
	a bridge now, not a frame.
        (-[WebView _close]): ditto
        (-[WebView _createFrameNamed:inParent:allowsScrolling:]): Create
	a bridge, not a frame.
        (-[WebView _commonInitializationWithFrameName:groupName:]): ditto.
        (-[WebView setDefersCallbacks:]): get mainFrame via method
        (-[WebView mainFrame]): Update to get the main frame properly


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@11851 268f45cc-cd09-0410-ab3c-d52691b4dbfc