Remove Scrollbar dependency on AXObjectCache

Source/core/platform/ScrollView.h

Index: Source/core/platform/ScrollView.h
diff --git a/Source/core/platform/ScrollView.h b/Source/core/platform/ScrollView.h
index cb9abe23b27e630217e8c32ab0b6d3b3986635a6..b520a52651f4861bae81aad5fc4a51ae8a053b4f 100644
--- a/Source/core/platform/ScrollView.h
+++ b/Source/core/platform/ScrollView.h
@@ -232,9 +232,6 @@ public:
         return newPoint;
     }
 
-    // A means to access the AX cache when this object can get a pointer to it.
-    virtual AXObjectCache* axObjectCache() const { return 0; }
-
     // Widget override. Handles painting of the contents of the view as well as the scrollbars.
     virtual void paint(GraphicsContext*, const IntRect&);
     void paintScrollbars(GraphicsContext*, const IntRect&);