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

Source/core/dom/custom/CustomElementSyncMicrotaskQueue.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 CustomElementSyncMicrotaskQueue_h
+#define CustomElementSyncMicrotaskQueue_h
+
+#include "core/dom/custom/CustomElementMicrotaskQueueBase.h"
+
+namespace WebCore {
+
+class CustomElementSyncMicrotaskQueue : public CustomElementMicrotaskQueueBase {
+public:
+    static PassRefPtrWillBeRawPtr<CustomElementSyncMicrotaskQueue> create() { return adoptRefWillBeNoop(new CustomElementSyncMicrotaskQueue()); }
+
+    void enqueue(PassOwnPtrWillBeRawPtr<CustomElementMicrotaskStep>);
+
+private:
+    CustomElementSyncMicrotaskQueue() { }
+    virtual void doDispatch();
+};
+
+}
+
+#endif