Fixed DOM traversal using NodeRenderingTraversal::parent().

Source/web/WebViewImpl.cpp

Index: Source/web/WebViewImpl.cpp
diff --git a/Source/web/WebViewImpl.cpp b/Source/web/WebViewImpl.cpp
index ea5ec18950cc2f9946141e5d29487d7f701da40d..5df3e5fac6fcde7f03c5fed483289f1bb886d3d4 100644
--- a/Source/web/WebViewImpl.cpp
+++ b/Source/web/WebViewImpl.cpp
@@ -1226,7 +1226,8 @@ Node* WebViewImpl::bestTapNode(const PlatformGestureEvent& tapEvent)
     // 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;