Update from https://crrev.com/306655

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:
+  virtual ~ClipDisplayItem();
+
+  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;
+
+ 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:
+  virtual ~EndClipDisplayItem();
+
+  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;
+
+ protected:
+  EndClipDisplayItem();
+};
+
+}  // namespace cc
+
+#endif  // CC_RESOURCES_CLIP_DISPLAY_ITEM_H_