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

third_party/WebKit/Source/core/events/EventListenerMap.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  *           (C) 2007, 2008 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2011 Andreas Kling (kling@webkit.org)
  *
  * Redistribution and use in source and binary forms, with or without
@@ skipping 161 matching lines @@
     assertNoActiveIterators();
 
     for (const auto& entry : m_entries) {
         if (entry.first == eventType)
             return entry.second.get();
     }
 
     return nullptr;
 }
 
-static void copyListenersNotCreatedFromMarkupToTarget(const AtomicString& eventType, EventListenerVector* listenerVector, EventTarget* target)
-{
-    for (auto& eventListener : *listenerVector) {
-        // Event listeners created from markup have already been transfered to the shadow tree during cloning.
-        if (eventListener.listener()->wasCreatedFromMarkup())
-            continue;
-        AddEventListenerOptionsResolved options = eventListener.options();
-        target->addEventListener(eventType, eventListener.listener(), options);
-    }
-}
-
-void EventListenerMap::copyEventListenersNotCreatedFromMarkupToTarget(EventTarget* target)
-{
-    assertNoActiveIterators();
-
-    for (const auto& eventListener : m_entries)
-        copyListenersNotCreatedFromMarkupToTarget(eventListener.first, eventListener.second.get(), target);
-}
-
 DEFINE_TRACE(EventListenerMap)
 {
     visitor->trace(m_entries);
 }
 
 EventListenerIterator::EventListenerIterator(EventTarget* target)
     : m_map(nullptr)
     , m_entryIndex(0)
     , m_index(0)
 {
@@ skipping 32 matching lines @@
         EventListenerVector& listeners = *m_map->m_entries[m_entryIndex].second;
         if (m_index < listeners.size())
             return listeners[m_index++].listener();
         m_index = 0;
     }
 
     return nullptr;
 }
 
 } // namespace blink