Remove parts of //cc we aren't using

cc/resources/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_RESOURCES_COMPOSITING_DISPLAY_ITEM_H_
-#define CC_RESOURCES_COMPOSITING_DISPLAY_ITEM_H_
-
-#include "base/memory/scoped_ptr.h"
-#include "cc/base/cc_export.h"
-#include "cc/resources/display_item.h"
-#include "skia/ext/refptr.h"
-#include "third_party/skia/include/core/SkColorFilter.h"
-#include "third_party/skia/include/core/SkRect.h"
-#include "third_party/skia/include/core/SkXfermode.h"
-#include "ui/gfx/geometry/rect_f.h"
-
-class SkCanvas;
-class SkDrawPictureCallback;
-
-namespace cc {
-
-class CC_EXPORT CompositingDisplayItem : public DisplayItem {
- public:
-  ~CompositingDisplayItem() override;
-
-  static scoped_ptr<CompositingDisplayItem> Create(
-      float opacity,
-      SkXfermode::Mode xfermode,
-      SkRect* bounds,
-      skia::RefPtr<SkColorFilter> color_filter) {
-    return make_scoped_ptr(
-        new CompositingDisplayItem(opacity, xfermode, bounds, color_filter));
-  }
-
-  void Raster(SkCanvas* canvas, SkDrawPictureCallback* callback) const override;
-
-  bool IsSuitableForGpuRasterization() const override;
-  int ApproximateOpCount() const override;
-  size_t PictureMemoryUsage() const override;
-  void AsValueInto(base::trace_event::TracedValue* array) const override;
-
- protected:
-  CompositingDisplayItem(float opacity,
-                         SkXfermode::Mode,
-                         SkRect* bounds,
-                         skia::RefPtr<SkColorFilter>);
-
- private:
-  float opacity_;
-  SkXfermode::Mode xfermode_;
-  bool has_bounds_;
-  SkRect bounds_;
-  skia::RefPtr<SkColorFilter> color_filter_;
-};
-
-class CC_EXPORT EndCompositingDisplayItem : public DisplayItem {
- public:
-  ~EndCompositingDisplayItem() override;
-
-  static scoped_ptr<EndCompositingDisplayItem> Create() {
-    return make_scoped_ptr(new EndCompositingDisplayItem());
-  }
-
-  void Raster(SkCanvas* canvas, SkDrawPictureCallback* callback) const override;
-
-  bool IsSuitableForGpuRasterization() const override;
-  int ApproximateOpCount() const override;
-  size_t PictureMemoryUsage() const override;
-  void AsValueInto(base::trace_event::TracedValue* array) const override;
-
- protected:
-  EndCompositingDisplayItem();
-};
-
-}  // namespace cc
-
-#endif  // CC_RESOURCES_COMPOSITING_DISPLAY_ITEM_H_