cc: Devirtualize DisplayItem::ExternalMemoryUsage().

cc/playback/float_clip_display_item.cc

 // Copyright 2015 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/float_clip_display_item.h"
 
 #include <stddef.h>
 
 #include "base/strings/stringprintf.h"
 #include "base/trace_event/trace_event_argument.h"
 #include "cc/proto/display_item.pb.h"
 #include "cc/proto/gfx_conversions.h"
 #include "third_party/skia/include/core/SkCanvas.h"
 #include "ui/gfx/skia_util.h"
 
 namespace cc {
 
-FloatClipDisplayItem::FloatClipDisplayItem(const gfx::RectF& clip_rect) {
+FloatClipDisplayItem::FloatClipDisplayItem(const gfx::RectF& clip_rect)
+    : DisplayItem(FLOAT_CLIP) {
   SetNew(clip_rect);
 }
 
-FloatClipDisplayItem::FloatClipDisplayItem(const proto::DisplayItem& proto) {
+FloatClipDisplayItem::FloatClipDisplayItem(const proto::DisplayItem& proto)
+    : DisplayItem(FLOAT_CLIP) {
   DCHECK_EQ(proto::DisplayItem::Type_FloatClip, proto.type());
 
   const proto::FloatClipDisplayItem& details = proto.float_clip_item();
   gfx::RectF clip_rect = ProtoToRectF(details.clip_rect());
 
   SetNew(clip_rect);
 }
 
 FloatClipDisplayItem::~FloatClipDisplayItem() {
 }
@@ skipping 16 matching lines @@
 }
 
 void FloatClipDisplayItem::AsValueInto(
     const gfx::Rect& visual_rect,
     base::trace_event::TracedValue* array) const {
   array->AppendString(base::StringPrintf(
       "FloatClipDisplayItem rect: [%s] visualRect: [%s]",
       clip_rect_.ToString().c_str(), visual_rect.ToString().c_str()));
 }
 
-size_t FloatClipDisplayItem::ExternalMemoryUsage() const {
-  return 0;
-}
-
-EndFloatClipDisplayItem::EndFloatClipDisplayItem() {}
+EndFloatClipDisplayItem::EndFloatClipDisplayItem()
+    : DisplayItem(END_FLOAT_CLIP) {}
 
 EndFloatClipDisplayItem::EndFloatClipDisplayItem(
-    const proto::DisplayItem& proto) {
+    const proto::DisplayItem& proto)
+    : DisplayItem(END_FLOAT_CLIP) {
   DCHECK_EQ(proto::DisplayItem::Type_EndFloatClip, proto.type());
 }
 
 EndFloatClipDisplayItem::~EndFloatClipDisplayItem() {
 }
 
 void EndFloatClipDisplayItem::ToProtobuf(proto::DisplayItem* proto) const {
   proto->set_type(proto::DisplayItem::Type_EndFloatClip);
 }
 
 void EndFloatClipDisplayItem::Raster(
     SkCanvas* canvas,
     SkPicture::AbortCallback* callback) const {
   canvas->restore();
 }
 
 void EndFloatClipDisplayItem::AsValueInto(
     const gfx::Rect& visual_rect,
     base::trace_event::TracedValue* array) const {
   array->AppendString(
       base::StringPrintf("EndFloatClipDisplayItem visualRect: [%s]",
                          visual_rect.ToString().c_str()));
 }
 
-size_t EndFloatClipDisplayItem::ExternalMemoryUsage() const {
-  return 0;
-}
-
 }  // namespace cc