Page::chrome() should return a reference.

Source/core/accessibility/AXObjectCache.cpp

 /*
  * Copyright (C) 2008, 2009, 2010 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 941 matching lines @@
             return;
         Document* document = toFrameView(scrollBar->parent())->frame()->document();
         if (document != document->topDocument())
             return;
         obj = get(document->renderer());
     }
 
     if (!obj || !obj->document() || !obj->documentFrameView() || !obj->documentFrameView()->frame() || !obj->documentFrameView()->frame()->page())
         return;
 
-    ChromeClient* client = obj->documentFrameView()->frame()->page()->chrome()->client();
+    ChromeClient* client = obj->documentFrameView()->frame()->page()->chrome().client();
     if (!client)
         return;
 
     switch (notification) {
     case AXActiveDescendantChanged:
         if (!obj->document()->focusedNode() || (obj->node() != obj->document()->focusedNode()))
             break;
 
         // Calling handleFocusedUIElementChanged will focus the new active
         // descendant and send the AXFocusedUIElementChanged notification.
@@ skipping 51 matching lines @@
 void AXObjectCache::handleScrolledToAnchor(const Node* anchorNode)
 {
     // The anchor node may not be accessible. Post the notification for the
     // first accessible object.
     postPlatformNotification(AccessibilityObject::firstAccessibleObjectFromNode(anchorNode), AXScrolledToAnchor);
 }
 
 } // namespace WebCore
 
 #endif // HAVE(ACCESSIBILITY)