Remove more oilpan.

sky/engine/core/dom/custom/CustomElementMicrotaskRunQueue.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 CustomElementMicrotaskRunQueue_h
 #define CustomElementMicrotaskRunQueue_h
 
 #include "base/memory/weak_ptr.h"
-#include "platform/heap/Handle.h"
+#include "wtf/PassOwnPtr.h"
 #include "wtf/RefCounted.h"
+#include "wtf/RefPtr.h"
 
 namespace blink {
 
 class CustomElementSyncMicrotaskQueue;
 class CustomElementAsyncImportMicrotaskQueue;
 class CustomElementMicrotaskStep;
 class HTMLImportLoader;
 
 class CustomElementMicrotaskRunQueue : public RefCounted<CustomElementMicrotaskRunQueue> {
-    DECLARE_EMPTY_DESTRUCTOR_WILL_BE_REMOVED(CustomElementMicrotaskRunQueue)
 public:
     static PassRefPtr<CustomElementMicrotaskRunQueue> create() { return adoptRef(new CustomElementMicrotaskRunQueue()); }
+    ~CustomElementMicrotaskRunQueue();
 
     void enqueue(HTMLImportLoader* parentLoader, PassOwnPtr<CustomElementMicrotaskStep>, bool importIsSync);
     void requestDispatchIfNeeded();
     bool isEmpty() const;
 
-    void trace(Visitor*);
-
 private:
     CustomElementMicrotaskRunQueue();
 
     void dispatch();
 
     RefPtr<CustomElementSyncMicrotaskQueue> m_syncQueue;
     RefPtr<CustomElementAsyncImportMicrotaskQueue> m_asyncQueue;
     bool m_dispatchIsPending;
 
     base::WeakPtrFactory<CustomElementMicrotaskRunQueue> m_weakFactory;
 };
 
 }
 
 #endif