Move cc::DisplayItemList and related classes into cc/paint/

cc/playback/display_item.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 CC_PLAYBACK_DISPLAY_ITEM_H_
-#define CC_PLAYBACK_DISPLAY_ITEM_H_
-
-#include <stddef.h>
-
-#include <memory>
-
-#include "cc/base/cc_export.h"
-#include "cc/debug/traced_value.h"
-#include "third_party/skia/include/core/SkPicture.h"
-#include "ui/gfx/geometry/rect.h"
-
-namespace cc {
-
-class CC_EXPORT DisplayItem {
- public:
-  virtual ~DisplayItem() = default;
-
-  enum Type {
-    CLIP,
-    END_CLIP,
-    CLIP_PATH,
-    END_CLIP_PATH,
-    COMPOSITING,
-    END_COMPOSITING,
-    DRAWING,
-    FILTER,
-    END_FILTER,
-    FLOAT_CLIP,
-    END_FLOAT_CLIP,
-    TRANSFORM,
-    END_TRANSFORM,
-  };
-  const Type type;
-
- protected:
-  explicit DisplayItem(Type type) : type(type) {}
-};
-
-}  // namespace cc
-
-#endif  // CC_PLAYBACK_DISPLAY_ITEM_H_