cc: Shrink size of display item

cc/playback/clip_path_display_item.h

Index: cc/playback/clip_path_display_item.h
diff --git a/cc/playback/clip_path_display_item.h b/cc/playback/clip_path_display_item.h
index 6f37ebea7f0fc92eba08a5c446ad8e75b65f54c8..c571348f6689fa61e3b0ae7791d38d1bcd908113 100644
--- a/cc/playback/clip_path_display_item.h
+++ b/cc/playback/clip_path_display_item.h
@@ -17,11 +17,10 @@ namespace cc {
 
 class CC_EXPORT ClipPathDisplayItem : public DisplayItem {
  public:
-  ClipPathDisplayItem();
+  ClipPathDisplayItem(const SkPath& path, SkRegion::Op clip_op, bool antialias);
+  explicit ClipPathDisplayItem(const proto::DisplayItem& proto);
   ~ClipPathDisplayItem() override;
 
-  void SetNew(const SkPath& path, SkRegion::Op clip_op, bool antialias);
-
   void ToProtobuf(proto::DisplayItem* proto) const override;
   void FromProtobuf(const proto::DisplayItem& proto) override;
   void Raster(SkCanvas* canvas,
@@ -29,8 +28,14 @@ class CC_EXPORT ClipPathDisplayItem : public DisplayItem {
               SkPicture::AbortCallback* callback) const override;
   void AsValueInto(const gfx::Rect& visual_rect,
                    base::trace_event::TracedValue* array) const override;
+  size_t ExternalMemoryUsage() const override;
+
+  int ApproximateOpCount() const { return 1; }
+  bool IsSuitableForGpuRasterization() const { return true; }
 
  private:
+  void SetNew(const SkPath& path, SkRegion::Op clip_op, bool antialias);
+
   SkPath clip_path_;
   SkRegion::Op clip_op_;
   bool antialias_;
@@ -39,6 +44,7 @@ class CC_EXPORT ClipPathDisplayItem : public DisplayItem {
 class CC_EXPORT EndClipPathDisplayItem : public DisplayItem {
  public:
   EndClipPathDisplayItem();
+  explicit EndClipPathDisplayItem(const proto::DisplayItem& proto);
   ~EndClipPathDisplayItem() override;
 
   static scoped_ptr<EndClipPathDisplayItem> Create() {
@@ -52,6 +58,10 @@ class CC_EXPORT EndClipPathDisplayItem : public DisplayItem {
               SkPicture::AbortCallback* callback) const override;
   void AsValueInto(const gfx::Rect& visual_rect,
                    base::trace_event::TracedValue* array) const override;
+  size_t ExternalMemoryUsage() const override;
+
+  int ApproximateOpCount() const { return 0; }
+  bool IsSuitableForGpuRasterization() const { return true; }
 };
 
 }  // namespace cc