Blink-side contiguous allocation of display items.

Source/core/paint/CompositingRecorder.cpp

 // 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 "config.h"
 #include "core/paint/CompositingRecorder.h"
 
 #include "core/layout/LayoutObject.h"
 #include "platform/graphics/GraphicsContext.h"
 #include "platform/graphics/GraphicsLayer.h"
@@ skipping 13 matching lines @@
 {
     endCompositing(m_graphicsContext, m_client);
 }
 
 void CompositingRecorder::beginCompositing(GraphicsContext& graphicsContext, const DisplayItemClientWrapper& client, const SkXfermode::Mode xferMode, const float opacity, const FloatRect* bounds, ColorFilter colorFilter)
 {
     if (RuntimeEnabledFeatures::slimmingPaintEnabled()) {
         ASSERT(graphicsContext.displayItemList());
         if (graphicsContext.displayItemList()->displayItemConstructionIsDisabled())
             return;
-        graphicsContext.displayItemList()->add(BeginCompositingDisplayItem::create(client, xferMode, opacity, bounds, colorFilter));
+        graphicsContext.displayItemList()->createAndAppend<BeginCompositingDisplayItem>(client, xferMode, opacity, bounds, colorFilter);
     } else {
-        BeginCompositingDisplayItem beginCompositingDisplayItem(client, xferMode, opacity, bounds, colorFilter);
-        beginCompositingDisplayItem.replay(graphicsContext);
+        BeginCompositingDisplayItem compositingDisplayItem(client, xferMode, opacity, bounds, colorFilter);
+        compositingDisplayItem.replay(graphicsContext);
     }
 }
 
 void CompositingRecorder::endCompositing(GraphicsContext& graphicsContext, const DisplayItemClientWrapper& client)
 {
     if (RuntimeEnabledFeatures::slimmingPaintEnabled()) {
         ASSERT(graphicsContext.displayItemList());
         if (!graphicsContext.displayItemList()->displayItemConstructionIsDisabled()) {
             if (graphicsContext.displayItemList()->lastDisplayItemIsNoopBegin())
                 graphicsContext.displayItemList()->removeLastDisplayItem();
             else
-                graphicsContext.displayItemList()->add(EndCompositingDisplayItem::create(client));
+                graphicsContext.displayItemList()->createAndAppend<EndCompositingDisplayItem>(client);
         }
     } else {
         EndCompositingDisplayItem endCompositingDisplayItem(client);
         endCompositingDisplayItem.replay(graphicsContext);
     }
 }
 
 } // namespace blink