Do not call an event listener on a cloned node in svg <use>'s UA shadow tree

third_party/WebKit/Source/core/svg/SVGUseElement.cpp

 /*
  * Copyright (C) 2004, 2005, 2006, 2007, 2008 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007 Rob Buis <buis@kde.org>
  * Copyright (C) Research In Motion Limited 2009-2010. All rights reserved.
  * Copyright (C) 2011 Torch Mobile (Beijing) Co. Ltd. All rights reserved.
  * Copyright (C) 2012 University of Szeged
  * Copyright (C) 2012 Renata Hodovan <reni@webkit.org>
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ skipping 424 matching lines @@
 
     // Set up root SVG element in shadow tree.
     // Clone the target subtree into the shadow tree, not handling <use> and <symbol> yet.
     Element* instanceRoot = createInstanceTree(target);
     m_targetElementInstance = toSVGElement(instanceRoot);
     ShadowRoot* shadowTreeRootElement = userAgentShadowRoot();
     shadowTreeRootElement->appendChild(instanceRoot);
 
     addReferencesToFirstDegreeNestedUseElements(target);
 
-    if (instanceTreeIsLoading()) {
-        cloneNonMarkupEventListeners();
+    if (instanceTreeIsLoading())
         return;
-    }
 
     // Assure shadow tree building was successful.
     ASSERT(m_targetElementInstance);
     ASSERT(m_targetElementInstance->correspondingUseElement() == this);
     ASSERT(m_targetElementInstance->correspondingElement() == &target);
 
     // Expand all <use> elements in the shadow tree.
     // Expand means: replace the actual <use> element by what it references.
     if (!expandUseElementsInShadowTree()) {
         clearShadowTree();
         return;
     }
 
     // If the instance root was a <use>, it could have been replaced now, so
     // reset |m_targetElementInstance|.
     m_targetElementInstance = toSVGElement(shadowTreeRootElement->firstChild());
     ASSERT(m_targetElementInstance->parentNode() == shadowTreeRootElement);
 
-    cloneNonMarkupEventListeners();
-
     // Update relative length information.
     updateRelativeLengthsInformation();
 }
 
 LayoutObject* SVGUseElement::createLayoutObject(const ComputedStyle&)
 {
     return new LayoutSVGTransformableContainer(this);
 }
 
 static bool isDirectReference(const SVGElement& element)
@@ skipping 62 matching lines @@
         return;
     // We only need to track first degree <use> dependencies. Indirect
     // references are handled as the invalidation bubbles up the dependency
     // chain.
     SVGUseElement* useElement =
         isSVGUseElement(target) ? toSVGUseElement(&target) : Traversal<SVGUseElement>::firstWithin(target);
     for (; useElement; useElement = Traversal<SVGUseElement>::nextSkippingChildren(*useElement, &target))
         addReferenceTo(useElement);
 }
 
-void SVGUseElement::cloneNonMarkupEventListeners()
-{
-    for (SVGElement& element : Traversal<SVGElement>::descendantsOf(*userAgentShadowRoot())) {
-        if (EventTargetData* data = element.correspondingElement()->eventTargetData())
-            data->eventListenerMap.copyEventListenersNotCreatedFromMarkupToTarget(&element);
-    }
-}
-
 bool SVGUseElement::hasCycleUseReferencing(const SVGUseElement& use, const ContainerNode& targetInstance, SVGElement*& newTarget) const
 {
     Element* targetElement = targetElementFromIRIString(use.hrefString(), use.treeScope());
     newTarget = 0;
     if (targetElement && targetElement->isSVGElement())
         newTarget = toSVGElement(targetElement);
 
     if (!newTarget)
         return false;
 
@@ skipping 187 matching lines @@
 
     if (m_resource)
         m_resource->removeClient(this);
 
     m_resource = resource;
     if (m_resource)
         m_resource->addClient(this);
 }
 
 } // namespace blink