Detach Event Listener Properties before moving Node.

third_party/WebKit/Source/core/frame/EventHandlerRegistry.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef EventHandlerRegistry_h
 #define EventHandlerRegistry_h
 
 #include "core/CoreExport.h"
 #include "core/frame/FrameHost.h"
 #include "wtf/HashCountedSet.h"
@@ skipping 45 matching lines @@
                           const AddEventListenerOptions&);
   void didAddEventHandler(EventTarget&, EventHandlerClass);
   void didRemoveEventHandler(EventTarget&,
                              const AtomicString& eventType,
                              const AddEventListenerOptions&);
   void didRemoveEventHandler(EventTarget&, EventHandlerClass);
   void didRemoveAllEventHandlers(EventTarget&);
 
   void didMoveIntoFrameHost(EventTarget&);
   void didMoveOutOfFrameHost(EventTarget&);
-  static void didMoveBetweenFrameHosts(EventTarget&,
-                                       FrameHost* oldFrameHost,
-                                       FrameHost* newFrameHost);
 
   // Either |documentDetached| or |didMove{Into,OutOf,Between}FrameHosts| must
   // be called whenever the FrameHost that is associated with a registered event
   // target changes. This ensures the registry does not end up with stale
   // references to handlers that are no longer related to it.
   void documentDetached(Document&);
 
   DECLARE_TRACE();
   void clearWeakMembers(Visitor*);
 
@@ skipping 41 matching lines @@
 
   void checkConsistency() const;
 
   Member<FrameHost> m_frameHost;
   EventTargetSet m_targets[EventHandlerClassCount];
 };
 
 }  // namespace blink
 
 #endif  // EventHandlerRegistry_h