Revert of Move ViewDisplayList to GraphicsLayer

Source/platform/graphics/paint/ClipDisplayItem.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 ClipDisplayItem_h
-#define ClipDisplayItem_h
-
-#include "platform/PlatformExport.h"
-#include "platform/geometry/IntRect.h"
-#include "platform/graphics/paint/DisplayItem.h"
-#include "wtf/Vector.h"
-
-namespace blink {
-
-class RoundedRect;
-
-class PLATFORM_EXPORT ClipDisplayItem : public DisplayItem {
-public:
-    ClipDisplayItem(DisplayItemClient client, Type type, IntRect clipRect)
-        : DisplayItem(client, type), m_clipRect(clipRect) { }
-
-    Vector<RoundedRect>& roundedRectClips() { return m_roundedRectClips; }
-
-private:
-    virtual void replay(GraphicsContext*) override;
-
-    IntRect m_clipRect;
-    Vector<RoundedRect> m_roundedRectClips;
-#ifndef NDEBUG
-    virtual WTF::String asDebugString() const override;
-#endif
-};
-
-class PLATFORM_EXPORT EndClipDisplayItem : public DisplayItem {
-public:
-    EndClipDisplayItem() : DisplayItem(0, EndClip) { }
-
-private:
-    virtual void replay(GraphicsContext*) override;
-};
-
-} // namespace blink
-
-#endif // ClipDisplayItem_h