cc: Shrink size of display item

cc/playback/transform_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/transform_display_item.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"
 
 namespace cc {
 
-TransformDisplayItem::TransformDisplayItem()
+TransformDisplayItem::TransformDisplayItem(const gfx::Transform& transform)
     : transform_(gfx::Transform::kSkipInitialization) {
+  SetNew(transform);
+}
+
+TransformDisplayItem::TransformDisplayItem(const proto::DisplayItem& proto) {
+  DCHECK_EQ(proto::DisplayItem::Type_Transform, proto.type());
+
+  const proto::TransformDisplayItem& details = proto.transform_item();
+  gfx::Transform transform = ProtoToTransform(details.transform());
+
+  SetNew(transform);
 }
 
 TransformDisplayItem::~TransformDisplayItem() {
 }
 
 void TransformDisplayItem::SetNew(const gfx::Transform& transform) {
   transform_ = transform;
-
-  DisplayItem::SetNew(true /* suitable_for_gpu_raster */, 1 /* op_count */,
-                      0 /* external_memory_usage */);
 }
 
 void TransformDisplayItem::ToProtobuf(proto::DisplayItem* proto) const {
   proto->set_type(proto::DisplayItem::Type_Transform);
 
   proto::TransformDisplayItem* details = proto->mutable_transform_item();
   TransformToProto(transform_, details->mutable_transform());
 }
 
-void TransformDisplayItem::FromProtobuf(const proto::DisplayItem& proto) {
-  DCHECK_EQ(proto::DisplayItem::Type_Transform, proto.type());
-
-  const proto::TransformDisplayItem& details = proto.transform_item();
-  gfx::Transform transform = ProtoToTransform(details.transform());
-
-  SetNew(transform);
-}
-
 void TransformDisplayItem::Raster(SkCanvas* canvas,
                                   const gfx::Rect& canvas_target_playback_rect,
                                   SkPicture::AbortCallback* callback) const {
   canvas->save();
   if (!transform_.IsIdentity())
     canvas->concat(transform_.matrix());
 }
 
 void TransformDisplayItem::AsValueInto(
     const gfx::Rect& visual_rect,
     base::trace_event::TracedValue* array) const {
   array->AppendString(base::StringPrintf(
       "TransformDisplayItem transform: [%s] visualRect: [%s]",
       transform_.ToString().c_str(), visual_rect.ToString().c_str()));
 }
 
-EndTransformDisplayItem::EndTransformDisplayItem() {
-  DisplayItem::SetNew(true /* suitable_for_gpu_raster */, 0 /* op_count */,
-                      0 /* external_memory_usage */);
+size_t TransformDisplayItem::ExternalMemoryUsage() const {
+  return 0;
+}
+
+EndTransformDisplayItem::EndTransformDisplayItem() {}
+
+EndTransformDisplayItem::EndTransformDisplayItem(
+    const proto::DisplayItem& proto) {
+  DCHECK_EQ(proto::DisplayItem::Type_EndTransform, proto.type());
 }
 
 EndTransformDisplayItem::~EndTransformDisplayItem() {
 }
 
 void EndTransformDisplayItem::ToProtobuf(proto::DisplayItem* proto) const {
   proto->set_type(proto::DisplayItem::Type_EndTransform);
 }
 
-void EndTransformDisplayItem::FromProtobuf(const proto::DisplayItem& proto) {
-  DCHECK_EQ(proto::DisplayItem::Type_EndTransform, proto.type());
-}
-
 void EndTransformDisplayItem::Raster(
     SkCanvas* canvas,
     const gfx::Rect& canvas_target_playback_rect,
     SkPicture::AbortCallback* callback) const {
   canvas->restore();
 }
 
 void EndTransformDisplayItem::AsValueInto(
     const gfx::Rect& visual_rect,
     base::trace_event::TracedValue* array) const {
   array->AppendString(
       base::StringPrintf("EndTransformDisplayItem visualRect: [%s]",
                          visual_rect.ToString().c_str()));
 }
 
+size_t EndTransformDisplayItem::ExternalMemoryUsage() const {
+  return 0;
+}
+
 }  // namespace cc