cc: Devirtualize DisplayItem::ExternalMemoryUsage().

cc/playback/drawing_display_item.cc

 // 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.
 
 #include "cc/playback/drawing_display_item.h"
 
 #include <stddef.h>
 
 #include <string>
 
 #include "base/strings/stringprintf.h"
 #include "base/trace_event/trace_event.h"
 #include "base/trace_event/trace_event_argument.h"
 #include "base/values.h"
 #include "cc/blimp/client_picture_cache.h"
 #include "cc/blimp/image_serialization_processor.h"
 #include "cc/debug/picture_debug_util.h"
 #include "cc/proto/display_item.pb.h"
 #include "third_party/skia/include/core/SkCanvas.h"
 #include "third_party/skia/include/core/SkData.h"
 #include "third_party/skia/include/core/SkMatrix.h"
 #include "third_party/skia/include/core/SkPicture.h"
 #include "third_party/skia/include/core/SkStream.h"
 #include "third_party/skia/include/utils/SkPictureUtils.h"
 #include "ui/gfx/skia_util.h"
 
 namespace cc {
 
-DrawingDisplayItem::DrawingDisplayItem() {}
+DrawingDisplayItem::DrawingDisplayItem() : DisplayItem(DRAWING) {}
 
-DrawingDisplayItem::DrawingDisplayItem(sk_sp<const SkPicture> picture) {
+DrawingDisplayItem::DrawingDisplayItem(sk_sp<const SkPicture> picture)
+    : DisplayItem(DRAWING) {
   SetNew(std::move(picture));
 }
 
 DrawingDisplayItem::DrawingDisplayItem(
     const proto::DisplayItem& proto,
     ClientPictureCache* client_picture_cache,
-    std::vector<uint32_t>* used_engine_picture_ids) {
+    std::vector<uint32_t>* used_engine_picture_ids)
+    : DisplayItem(DRAWING) {
   DCHECK_EQ(proto::DisplayItem::Type_Drawing, proto.type());
   DCHECK(client_picture_cache);
 
   const proto::DrawingDisplayItem& details = proto.drawing_item();
   DCHECK(details.has_id());
   const proto::SkPictureID& sk_picture_id = details.id();
   DCHECK(sk_picture_id.has_unique_id());
 
   uint32_t unique_id = sk_picture_id.unique_id();
   sk_sp<const SkPicture> picture = client_picture_cache->GetPicture(unique_id);
   DCHECK(picture);
 
   used_engine_picture_ids->push_back(unique_id);
   SetNew(std::move(picture));
 }
 
-DrawingDisplayItem::DrawingDisplayItem(const DrawingDisplayItem& item) {
+DrawingDisplayItem::DrawingDisplayItem(const DrawingDisplayItem& item)
+    : DisplayItem(DRAWING) {
   item.CloneTo(this);
 }
 
 DrawingDisplayItem::~DrawingDisplayItem() {
 }
 
 void DrawingDisplayItem::SetNew(sk_sp<const SkPicture> picture) {
   picture_ = std::move(picture);
 }
 
@@ skipping 59 matching lines @@
 size_t DrawingDisplayItem::ExternalMemoryUsage() const {
   return SkPictureUtils::ApproximateBytesUsed(picture_.get());
 }
 
 DISABLE_CFI_PERF
 int DrawingDisplayItem::ApproximateOpCount() const {
   return picture_->approximateOpCount();
 }
 
 }  // namespace cc