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

Source/core/dom/custom/CustomElementMicrotaskStepDispatcher.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 CustomElementMicrotaskStepDispatcher_h
+#define CustomElementMicrotaskStepDispatcher_h
+
+#include "core/dom/custom/CustomElementAsyncImportMicrotaskQueue.h"
+#include "core/dom/custom/CustomElementSyncMicrotaskQueue.h"
+#include "platform/heap/Handle.h"
+
+namespace WebCore {
+
+class HTMLImportLoader;
+
+class CustomElementMicrotaskStepDispatcher : public RefCountedWillBeGarbageCollectedFinalized<CustomElementMicrotaskStepDispatcher> {
+    WTF_MAKE_NONCOPYABLE(CustomElementMicrotaskStepDispatcher);
+public:
+    static PassRefPtrWillBeRawPtr<CustomElementMicrotaskStepDispatcher> create() { return adoptRefWillBeNoop(new CustomElementMicrotaskStepDispatcher()); }
+
+    void enqueue(HTMLImportLoader* parentLoader, PassOwnPtrWillBeRawPtr<CustomElementMicrotaskStep>);
+    void enqueue(HTMLImportLoader* parentLoader, PassOwnPtrWillBeRawPtr<CustomElementMicrotaskImportStep>, bool importIsSync);
+
+    void dispatch();
+    void trace(Visitor*);
+
+#if !defined(NDEBUG)
+    void show(unsigned indent);
+#endif
+
+private:
+    CustomElementMicrotaskStepDispatcher();
+
+    RefPtrWillBeMember<CustomElementSyncMicrotaskQueue> m_syncQueue;
+    RefPtrWillBeMember<CustomElementAsyncImportMicrotaskQueue> m_asyncQueue;
+};
+
+}
+
+#endif // CustomElementMicrotaskStepDispatcher_h