Delete sky/engine/core/dom/custom

sky/engine/core/dom/custom/CustomElementMicrotaskDispatcher.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 SKY_ENGINE_CORE_DOM_CUSTOM_CUSTOMELEMENTMICROTASKDISPATCHER_H_
-#define SKY_ENGINE_CORE_DOM_CUSTOM_CUSTOMELEMENTMICROTASKDISPATCHER_H_
-
-#include "sky/engine/platform/heap/Handle.h"
-#include "sky/engine/wtf/Noncopyable.h"
-#include "sky/engine/wtf/PassOwnPtr.h"
-#include "sky/engine/wtf/Vector.h"
-
-namespace blink {
-
-class CustomElementCallbackQueue;
-class CustomElementMicrotaskImportStep;
-class CustomElementMicrotaskStep;
-class Document;
-class HTMLImportLoader;
-
-class CustomElementMicrotaskDispatcher final {
-    WTF_MAKE_NONCOPYABLE(CustomElementMicrotaskDispatcher);
-    DECLARE_EMPTY_DESTRUCTOR_WILL_BE_REMOVED(CustomElementMicrotaskDispatcher);
-public:
-    static CustomElementMicrotaskDispatcher& instance();
-
-    void enqueue(CustomElementCallbackQueue*);
-
-    bool elementQueueIsEmpty() { return m_elements.isEmpty(); }
-
-private:
-    CustomElementMicrotaskDispatcher();
-
-    void ensureMicrotaskScheduledForElementQueue();
-    void ensureMicrotaskScheduled();
-
-    static void dispatch();
-    void doDispatch();
-
-    bool m_hasScheduledMicrotask;
-    enum {
-        Quiescent,
-        Resolving,
-        DispatchingCallbacks
-    } m_phase;
-
-    Vector<RawPtr<CustomElementCallbackQueue> > m_elements;
-};
-
-}
-
-#endif  // SKY_ENGINE_CORE_DOM_CUSTOM_CUSTOMELEMENTMICROTASKDISPATCHER_H_