cc: Use a ListContainer for DisplayItemList to reduce allocations.

ui/compositor/compositing_recorder.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 "ui/compositor/compositing_recorder.h"
 
 #include "cc/resources/compositing_display_item.h"
 #include "cc/resources/display_item_list.h"
 #include "ui/compositor/paint_context.h"
 #include "ui/gfx/canvas.h"
 
 namespace ui {
 
 CompositingRecorder::CompositingRecorder(const PaintContext& context,
                                          uint8_t alpha)
     : context_(context), saved_(alpha < 255) {
   if (!saved_)
     return;
 
   if (context_.canvas_) {
     context_.canvas_->SaveLayerAlpha(alpha);
   } else {
-    context_.list_->AppendItem(cc::CompositingDisplayItem::Create(
-        alpha, SkXfermode::kSrcOver_Mode, nullptr /* no bounds */,
-        skia::RefPtr<SkColorFilter>()));
+    auto* item =
+        context_.list_->CreateAndAppendItem<cc::CompositingDisplayItem>();
+    item->SetNew(alpha, SkXfermode::kSrcOver_Mode, nullptr /* no bounds */,
+                 skia::RefPtr<SkColorFilter>());
   }
 }
 
 CompositingRecorder::~CompositingRecorder() {
   if (!saved_)
     return;
 
   if (context_.canvas_) {
     context_.canvas_->Restore();
   } else {
-    context_.list_->AppendItem(cc::EndCompositingDisplayItem::Create());
+    context_.list_->CreateAndAppendItem<cc::EndCompositingDisplayItem>();
   }
 }
 
 }  // namespace ui