Blink-side contiguous allocation of display items.

Source/core/paint/Transform3DRecorder.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/Transform3DRecorder.h"
 
 #include "platform/RuntimeEnabledFeatures.h"
 #include "platform/graphics/GraphicsContext.h"
 #include "platform/graphics/paint/DisplayItemList.h"
 #include "platform/graphics/paint/Transform3DDisplayItem.h"
 
 namespace blink {
 
 Transform3DRecorder::Transform3DRecorder(GraphicsContext& context, const DisplayItemClientWrapper& client, DisplayItem::Type type, const TransformationMatrix& transform)
     : m_context(context)
     , m_client(client)
     , m_type(type)
 {
     ASSERT(DisplayItem::isTransform3DType(type));
     m_skipRecordingForIdentityTransform = transform.isIdentity();
 
     if (m_skipRecordingForIdentityTransform)
         return;
 
     if (RuntimeEnabledFeatures::slimmingPaintEnabled()) {
         ASSERT(m_context.displayItemList());
         if (m_context.displayItemList()->displayItemConstructionIsDisabled())
             return;
-        m_context.displayItemList()->add(BeginTransform3DDisplayItem::create(m_client, m_type, transform));
+        m_context.displayItemList()->createAndAppend<BeginTransform3DDisplayItem>(m_client, m_type, transform);
     } else {
         BeginTransform3DDisplayItem beginTransform(m_client, m_type, transform);
         beginTransform.replay(m_context);
     }
 }
 
 Transform3DRecorder::~Transform3DRecorder()
 {
     if (m_skipRecordingForIdentityTransform)
         return;
 
     DisplayItem::Type endType = DisplayItem::transform3DTypeToEndTransform3DType(m_type);
     if (RuntimeEnabledFeatures::slimmingPaintEnabled()) {
         ASSERT(m_context.displayItemList());
         if (!m_context.displayItemList()->displayItemConstructionIsDisabled()) {
             if (m_context.displayItemList()->lastDisplayItemIsNoopBegin())
                 m_context.displayItemList()->removeLastDisplayItem();
             else
-                m_context.displayItemList()->add(EndTransform3DDisplayItem::create(m_client, endType));
+                m_context.displayItemList()->createAndAppend<EndTransform3DDisplayItem>(m_client, endType);
         }
     } else {
         EndTransform3DDisplayItem endTransform(m_client, endType);
         endTransform.replay(m_context);
     }
 }
 
 } // namespace blink