[wrapper-tracing] Trace CustomElementReactionStack

third_party/WebKit/Source/core/dom/custom/CustomElementReactionStack.h

 // Copyright 2016 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 CustomElementReactionStack_h
 #define CustomElementReactionStack_h
 
+#include "bindings/core/v8/ScriptWrappable.h"
 #include "core/CoreExport.h"
 #include "platform/heap/Handle.h"
 #include "wtf/Noncopyable.h"
 
 namespace blink {
 
 class CustomElementReaction;
 class CustomElementReactionQueue;
 class Element;
 
 // https://html.spec.whatwg.org/multipage/scripting.html#custom-element-reactions
 class CORE_EXPORT CustomElementReactionStack final
-    : public GarbageCollected<CustomElementReactionStack> {
+    : public GarbageCollected<CustomElementReactionStack>,
+      public TraceWrapperBase {
   WTF_MAKE_NONCOPYABLE(CustomElementReactionStack);
 
  public:
   CustomElementReactionStack();
 
   DECLARE_TRACE();
+  DECLARE_VIRTUAL_TRACE_WRAPPERS();
 
   void push();
   void popInvokingReactions();
   void enqueueToCurrentQueue(Element*, CustomElementReaction*);
   void enqueueToBackupQueue(Element*, CustomElementReaction*);
   void clearQueue(Element*);
 
   static CustomElementReactionStack& current();
 
  private:
   friend class CustomElementReactionStackTestSupport;
 
   using ElementReactionQueueMap =
-      HeapHashMap<Member<Element>, Member<CustomElementReactionQueue>>;
+      HeapHashMap<TraceWrapperMember<Element>,
+                  Member<CustomElementReactionQueue>>;
   ElementReactionQueueMap m_map;
 
   using ElementQueue = HeapVector<Member<Element>, 1>;
   HeapVector<Member<ElementQueue>> m_stack;
   Member<ElementQueue> m_backupQueue;
 
   void invokeBackupQueue();
   void invokeReactions(ElementQueue&);
   void enqueue(Member<ElementQueue>&, Element*, CustomElementReaction*);
 };
 
 class CORE_EXPORT CustomElementReactionStackTestSupport final {
  private:
   friend class ResetCustomElementReactionStackForTest;
 
   CustomElementReactionStackTestSupport() = delete;
   static CustomElementReactionStack* setCurrentForTest(
       CustomElementReactionStack*);
 };
 
 }  // namespace blink
 
 #endif  // CustomElementReactionStack_h