cc: Shrink size of display item

cc/playback/clip_display_item.cc

Index: cc/playback/clip_display_item.cc
diff --git a/cc/playback/clip_display_item.cc b/cc/playback/clip_display_item.cc
index d89566c1e0d685a327e4a4e97bc05c791f38f2e2..d5e3829a72eab0cd537353dc09051782453f8fa6 100644
--- a/cc/playback/clip_display_item.cc
+++ b/cc/playback/clip_display_item.cc
@@ -17,24 +17,24 @@
 
 namespace cc {
 
-ClipDisplayItem::ClipDisplayItem() {
+ClipDisplayItem::ClipDisplayItem(
+    gfx::Rect clip_rect,
+    const std::vector<SkRRect>& rounded_clip_rects) {
+  SetNew(clip_rect, rounded_clip_rects);
 }
 
-ClipDisplayItem::~ClipDisplayItem() {
+ClipDisplayItem::ClipDisplayItem(const proto::DisplayItem& proto) {
+  FromProtobuf(proto);
 }
 
 void ClipDisplayItem::SetNew(gfx::Rect clip_rect,
                              const std::vector<SkRRect>& rounded_clip_rects) {
   clip_rect_ = clip_rect;
   rounded_clip_rects_ = rounded_clip_rects;
-
-  size_t external_memory_usage =
-      rounded_clip_rects_.capacity() * sizeof(rounded_clip_rects_[0]);
-
-  DisplayItem::SetNew(true /* suitable_for_gpu_raster */, 1 /* op_count */,
-                      external_memory_usage);
 }
 
+ClipDisplayItem::~ClipDisplayItem() {}
+
 void ClipDisplayItem::ToProtobuf(proto::DisplayItem* proto) const {
   proto->set_type(proto::DisplayItem::Type_Clip);
 
@@ -104,9 +104,18 @@ void ClipDisplayItem::AsValueInto(const gfx::Rect& visual_rect,
   array->AppendString(value);
 }
 
-EndClipDisplayItem::EndClipDisplayItem() {
-  DisplayItem::SetNew(true /* suitable_for_gpu_raster */, 0 /* op_count */,
-                      0 /* external_memory_usage */);
+size_t ClipDisplayItem::ExternalMemoryUsage() const {
+  return rounded_clip_rects_.capacity() * sizeof(rounded_clip_rects_[0]);
+}
+
+int ClipDisplayItem::ApproximateOpCount() const {
+  return 1;
+}
+
+EndClipDisplayItem::EndClipDisplayItem() {}
+
+EndClipDisplayItem::EndClipDisplayItem(const proto::DisplayItem& proto) {
+  FromProtobuf(proto);
 }
 
 EndClipDisplayItem::~EndClipDisplayItem() {
@@ -133,4 +142,12 @@ void EndClipDisplayItem::AsValueInto(
                                          visual_rect.ToString().c_str()));
 }
 
+size_t EndClipDisplayItem::ExternalMemoryUsage() const {
+  return 0;
+}
+
+int EndClipDisplayItem::ApproximateOpCount() const {
+  return 0;
+}
+
 }  // namespace cc