Merge 117957

Source/WebCore/page/EventHandler.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  *
  * 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 2078 matching lines @@
 static inline SVGElementInstance* instanceAssociatedWithShadowTreeElement(Node* referenceNode)
 {
     if (!referenceNode || !referenceNode->isSVGElement())
         return 0;
 
     Node* shadowTreeElement = referenceNode->shadowTreeRootNode();
     if (!shadowTreeElement)
         return 0;
 
     Element* shadowTreeParentElement = shadowTreeElement->shadowHost();
-    if (!shadowTreeParentElement)
+    if (!shadowTreeParentElement || !shadowTreeParentElement->hasTagName(useTag))
         return 0;
 
-    ASSERT(shadowTreeParentElement->hasTagName(useTag));
     return static_cast<SVGUseElement*>(shadowTreeParentElement)->instanceForShadowTreeElement(referenceNode);
 }
 #endif
 
 void EventHandler::updateMouseEventTargetNode(Node* targetNode, const PlatformMouseEvent& mouseEvent, bool fireMouseOverOut)
 {
     Node* result = targetNode;
     
     // If we're capturing, we always go right to that node.
     if (m_capturingMouseEventsNode)
@@ skipping 1495 matching lines @@
     if (eventType == PlatformEvent::MouseMoved && !m_touchPressed)
         return false;
 
     SyntheticSingleTouchEvent touchEvent(event);
     return handleTouchEvent(touchEvent);
 }
 
 #endif
 
 }