Remove parts of //cc we aren't using

cc/resources/clip_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_RESOURCES_CLIP_DISPLAY_ITEM_H_
-#define CC_RESOURCES_CLIP_DISPLAY_ITEM_H_
-
-#include <vector>
-
-#include "base/memory/scoped_ptr.h"
-#include "cc/base/cc_export.h"
-#include "cc/resources/display_item.h"
-#include "third_party/skia/include/core/SkRRect.h"
-#include "ui/gfx/geometry/rect.h"
-
-class SkCanvas;
-class SkDrawPictureCallback;
-
-namespace cc {
-
-class CC_EXPORT ClipDisplayItem : public DisplayItem {
- public:
-  ~ClipDisplayItem() override;
-
-  static scoped_ptr<ClipDisplayItem> Create(
-      gfx::Rect clip_rect,
-      const std::vector<SkRRect>& rounded_clip_rects) {
-    return make_scoped_ptr(new ClipDisplayItem(clip_rect, rounded_clip_rects));
-  }
-
-  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:
-  ClipDisplayItem(gfx::Rect clip_rect,
-                  const std::vector<SkRRect>& rounded_clip_rects);
-
- private:
-  gfx::Rect clip_rect_;
-  std::vector<SkRRect> rounded_clip_rects_;
-};
-
-class CC_EXPORT EndClipDisplayItem : public DisplayItem {
- public:
-  ~EndClipDisplayItem() override;
-
-  static scoped_ptr<EndClipDisplayItem> Create() {
-    return make_scoped_ptr(new EndClipDisplayItem());
-  }
-
-  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:
-  EndClipDisplayItem();
-};
-
-}  // namespace cc
-
-#endif  // CC_RESOURCES_CLIP_DISPLAY_ITEM_H_