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

cc/playback/compositing_display_item.h

-// Copyright 2015 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_COMPOSITING_DISPLAY_ITEM_H_
-#define CC_PLAYBACK_COMPOSITING_DISPLAY_ITEM_H_
-
-#include <stddef.h>
-
-#include "cc/base/cc_export.h"
-#include "cc/playback/display_item.h"
-#include "third_party/skia/include/core/SkBlendMode.h"
-#include "third_party/skia/include/core/SkColorFilter.h"
-#include "third_party/skia/include/core/SkRect.h"
-#include "third_party/skia/include/core/SkRefCnt.h"
-
-namespace cc {
-
-class CC_EXPORT CompositingDisplayItem : public DisplayItem {
- public:
-  CompositingDisplayItem(uint8_t alpha,
-                         SkBlendMode xfermode,
-                         SkRect* bounds,
-                         sk_sp<SkColorFilter> color_filter,
-                         bool lcd_text_requires_opaque_layer);
-  ~CompositingDisplayItem() override;
-
-  size_t ExternalMemoryUsage() const {
-    // TODO(pdr): Include color_filter's memory here.
-    return 0;
-  }
-  int ApproximateOpCount() const { return 1; }
-
-  const uint8_t alpha;
-  const SkBlendMode xfermode;
-  const bool has_bounds;
-  const SkRect bounds;
-  const sk_sp<SkColorFilter> color_filter;
-  const bool lcd_text_requires_opaque_layer;
-};
-
-class CC_EXPORT EndCompositingDisplayItem : public DisplayItem {
- public:
-  EndCompositingDisplayItem();
-  ~EndCompositingDisplayItem() override;
-
-  int ApproximateOpCount() const { return 0; }
-};
-
-}  // namespace cc
-
-#endif  // CC_PLAYBACK_COMPOSITING_DISPLAY_ITEM_H_