Fixed DOM traversal using NodeRenderingTraversal::parent().

Source/web/WebViewImpl.cpp

 /*
  * Copyright (C) 2011, 2012 Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 1208 matching lines @@
     if (!cursorDefiningAncestor || !showsHandCursor(cursorDefiningAncestor, m_page->deprecatedLocalMainFrame())) {
         return 0;
     }
 
     // We should pick the largest enclosing node with hand cursor set. We do this by first jumping
     // up to cursorDefiningAncestor (which is already known to have hand cursor set). Then we locate
     // the next cursor-defining ancestor up in the the tree and repeat the jumps as long as the node
     // has hand cursor set.
     do {
         bestTouchNode = cursorDefiningAncestor;
-        cursorDefiningAncestor = findCursorDefiningAncestor(bestTouchNode->parentNode(), m_page->deprecatedLocalMainFrame());
+        cursorDefiningAncestor = findCursorDefiningAncestor(NodeRenderingTraversal::parent(bestTouchNode),
+            m_page->deprecatedLocalMainFrame());
     } while (cursorDefiningAncestor && showsHandCursor(cursorDefiningAncestor, m_page->deprecatedLocalMainFrame()));
 
     return bestTouchNode;
 }
 
 void WebViewImpl::enableTapHighlightAtPoint(const PlatformGestureEvent& tapEvent)
 {
     Node* touchNode = bestTapNode(tapEvent);
 
     WillBeHeapVector<RawPtrWillBeMember<Node> > highlightNodes;
@@ skipping 3025 matching lines @@
     const PageScaleConstraints& constraints = m_pageScaleConstraintsSet.pageDefinedConstraints();
 
     if (!mainFrameImpl() || !mainFrameImpl()->frameView())
         return false;
 
     return mainFrameImpl()->frameView()->layoutSize().width() == m_size.width
         || (constraints.minimumScale == constraints.maximumScale && constraints.minimumScale != -1);
 }
 
 } // namespace blink