Return Frame&, not Frame* from RenderView::frame()

Source/core/accessibility/AccessibilityObject.cpp

 /*
  * Copyright (C) 2008, 2009, 2011 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 540 matching lines @@
 
     return AXObjectCache::focusedUIElementForPage(page);
 }
 
 Document* AccessibilityObject::document() const
 {
     FrameView* frameView = documentFrameView();
     if (!frameView)
         return 0;
 
-    return frameView->frame()->document();
+    return frameView->frame().document();
 }
 
 FrameView* AccessibilityObject::documentFrameView() const
 {
     const AccessibilityObject* object = this;
     while (object && !object->isAccessibilityRenderObject())
         object = object->parentObject();
 
     if (!object)
         return 0;
@@ skipping 410 matching lines @@
 
     for (AccessibilityObject* object = parentObject(); object; object = object->parentObject()) {
         if (equalIgnoringCase(object->getAttribute(aria_hiddenAttr), "true"))
             return true;
     }
 
     return false;
 }
 
 } // namespace WebCore