Custom Elements: Encapsulates Async and Sync Queues into one class.

Source/core/dom/custom/CustomElementMicrotaskQueueBase.h

Index: Source/core/dom/custom/CustomElementMicrotaskQueueBase.h
diff --git a/Source/core/dom/custom/CustomElementMicrotaskQueueBase.h b/Source/core/dom/custom/CustomElementMicrotaskQueueBase.h
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+// 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 CustomElementMicrotaskQueueBase_h
+#define CustomElementMicrotaskQueueBase_h
+
+#include "core/dom/custom/CustomElementMicrotaskStep.h"
+#include "platform/heap/Handle.h"
+#include "wtf/OwnPtr.h"
+#include "wtf/PassOwnPtr.h"
+#include "wtf/PassRefPtr.h"
+#include "wtf/RefCounted.h"
+#include "wtf/RefPtr.h"
+#include "wtf/Vector.h"
+
+namespace WebCore {
+
+class CustomElementMicrotaskQueueBase : public RefCountedWillBeGarbageCollectedFinalized<CustomElementMicrotaskQueueBase> {
+    WTF_MAKE_NONCOPYABLE(CustomElementMicrotaskQueueBase);
+public:
+    virtual ~CustomElementMicrotaskQueueBase() { }
+
+    bool isEmpty() const { return m_queue.isEmpty(); }
+    void dispatch();
+
+    void trace(Visitor*);
+
+#if !defined(NDEBUG)
+    void show(unsigned indent);
+#endif
+
+protected:
+    CustomElementMicrotaskQueueBase() { }
+    virtual void doDispatch() = 0;
+
+    WillBeHeapVector<OwnPtrWillBeMember<CustomElementMicrotaskStep> > m_queue;
+};
+
+}
+
+#endif // CustomElementMicrotaskQueueBase_h