cc: Shrink size of display item

cc/playback/drawing_display_item.cc

Index: cc/playback/drawing_display_item.cc
diff --git a/cc/playback/drawing_display_item.cc b/cc/playback/drawing_display_item.cc
index 05935778582c5d8d11b716610cac185db21816d5..f314608f74818dd4d2f3df7f484b9fe2b2b0d53f 100644
--- a/cc/playback/drawing_display_item.cc
+++ b/cc/playback/drawing_display_item.cc
@@ -21,7 +21,29 @@
 
 namespace cc {
 
-DrawingDisplayItem::DrawingDisplayItem() {
+DrawingDisplayItem::DrawingDisplayItem() {}
+
+DrawingDisplayItem::DrawingDisplayItem(skia::RefPtr<SkPicture> picture) {
+  SetNew(std::move(picture));
+}
+
+DrawingDisplayItem::DrawingDisplayItem(const proto::DisplayItem& proto) {
+  DCHECK_EQ(proto::DisplayItem::Type_Drawing, proto.type());
+
+  skia::RefPtr<SkPicture> picture;
+  const proto::DrawingDisplayItem& details = proto.drawing_item();
+  if (details.has_picture()) {
+    SkMemoryStream stream(details.picture().data(), details.picture().size());
+
+    // TODO(dtrainor, nyquist): Add an image decoder.
+    picture = skia::AdoptRef(SkPicture::CreateFromStream(&stream, nullptr));
+  }
+
+  SetNew(std::move(picture));
+}
+
+DrawingDisplayItem::DrawingDisplayItem(const DrawingDisplayItem& item) {
+  item.CloneTo(this);
 }
 
 DrawingDisplayItem::~DrawingDisplayItem() {
@@ -29,9 +51,6 @@ DrawingDisplayItem::~DrawingDisplayItem() {
 
 void DrawingDisplayItem::SetNew(skia::RefPtr<SkPicture> picture) {
   picture_ = std::move(picture);
-  DisplayItem::SetNew(picture_->suitableForGpuRasterization(NULL),
-                      picture_->approximateOpCount(),
-                      SkPictureUtils::ApproximateBytesUsed(picture_.get()));
 }
 
 void DrawingDisplayItem::ToProtobuf(proto::DisplayItem* proto) const {
@@ -53,21 +72,6 @@ void DrawingDisplayItem::ToProtobuf(proto::DisplayItem* proto) const {
   }
 }
 
-void DrawingDisplayItem::FromProtobuf(const proto::DisplayItem& proto) {
-  DCHECK_EQ(proto::DisplayItem::Type_Drawing, proto.type());
-
-  skia::RefPtr<SkPicture> picture;
-  const proto::DrawingDisplayItem& details = proto.drawing_item();
-  if (details.has_picture()) {
-    SkMemoryStream stream(details.picture().data(), details.picture().size());
-
-    // TODO(dtrainor, nyquist): Add an image decoder.
-    picture = skia::AdoptRef(SkPicture::CreateFromStream(&stream, nullptr));
-  }
-
-  SetNew(std::move(picture));
-}
-
 void DrawingDisplayItem::Raster(SkCanvas* canvas,
                                 const gfx::Rect& canvas_target_playback_rect,
                                 SkPicture::AbortCallback* callback) const {
@@ -119,4 +123,16 @@ void DrawingDisplayItem::CloneTo(DrawingDisplayItem* item) const {
   item->SetNew(picture_);
 }
 
+size_t DrawingDisplayItem::ExternalMemoryUsage() const {
+  return SkPictureUtils::ApproximateBytesUsed(picture_.get());
+}
+
+int DrawingDisplayItem::ApproximateOpCount() const {
+  return picture_->approximateOpCount();
+}
+
+bool DrawingDisplayItem::IsSuitableForGpuRasterization() const {
+  return picture_->suitableForGpuRasterization(NULL);
+}
+
 }  // namespace cc