Reviewed by Maciej.

        Fix for http://bugs.webkit.org/show_bug.cgi?id=11461 HitTestResult 
        should be split into HitTestRequest and HitTestResult

        This patch creates a new struct called HitTestRequest that holds 
        the three boolean values (readonly, active, and mouseMove) that 
        were formerly a part of HitTestRequest. all hitTest() and 
        nodeAtPoint() functions now take a HitTestRequest in addition to 
        the HitTestResult.

WebKit:
        Reviewed by Maciej.

        Small tweaks to WebKit because of http://bugs.webkit.org/
        show_bug.cgi?id=11461 HitTestResult should be split into 
        HitTestRequest and HitTestResult

        * WebKit.xcodeproj/project.pbxproj:
        * WebView/WebHTMLView.m:
        (-[WebHTMLView elementAtPoint:allowShadowContent:]): The 
        HitTestResult initializer now just takes a point.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@17494 268f45cc-cd09-0410-ab3c-d52691b4dbfc