Rename all existing custom element classes as V0

third_party/WebKit/Source/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 CustomElementMicrotaskDispatcher_h
-#define CustomElementMicrotaskDispatcher_h
-
-#include "platform/heap/Handle.h"
-#include "wtf/Noncopyable.h"
-#include "wtf/Vector.h"
-
-namespace blink {
-
-class CustomElementCallbackQueue;
-
-class CustomElementMicrotaskDispatcher final : public GarbageCollected<CustomElementMicrotaskDispatcher> {
-    WTF_MAKE_NONCOPYABLE(CustomElementMicrotaskDispatcher);
-public:
-    static CustomElementMicrotaskDispatcher& instance();
-
-    void enqueue(CustomElementCallbackQueue*);
-
-    bool elementQueueIsEmpty() { return m_elements.isEmpty(); }
-
-    DECLARE_TRACE();
-
-private:
-    CustomElementMicrotaskDispatcher();
-
-    void ensureMicrotaskScheduledForElementQueue();
-    void ensureMicrotaskScheduled();
-
-    static void dispatch();
-    void doDispatch();
-
-    bool m_hasScheduledMicrotask;
-    enum {
-        Quiescent,
-        Resolving,
-        DispatchingCallbacks
-    } m_phase;
-
-    HeapVector<Member<CustomElementCallbackQueue>> m_elements;
-};
-
-} // namespace blink
-
-#endif // CustomElementMicrotaskDispatcher_h