Blink-side contiguous allocation of display items.

Source/platform/graphics/paint/ClipPathRecorder.cpp

 // 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 "config.h"
 #include "platform/graphics/paint/ClipPathRecorder.h"
 
 #include "platform/RuntimeEnabledFeatures.h"
 #include "platform/graphics/GraphicsContext.h"
 #include "platform/graphics/paint/ClipPathDisplayItem.h"
 #include "platform/graphics/paint/DisplayItemList.h"
 
 namespace blink {
 
 ClipPathRecorder::ClipPathRecorder(GraphicsContext& context, const DisplayItemClientWrapper& client, const Path& clipPath)
     : m_context(context)
     , m_client(client)
 {
     if (RuntimeEnabledFeatures::slimmingPaintEnabled()) {
         ASSERT(m_context.displayItemList());
         if (m_context.displayItemList()->displayItemConstructionIsDisabled())
             return;
-        m_context.displayItemList()->add(BeginClipPathDisplayItem::create(m_client, clipPath));
+        m_context.displayItemList()->createAndAppendIfNeeded<BeginClipPathDisplayItem>(m_client, clipPath);
     } else {
         BeginClipPathDisplayItem clipPathDisplayItem(m_client, clipPath);
         clipPathDisplayItem.replay(m_context);
     }
 }
 
 ClipPathRecorder::~ClipPathRecorder()
 {
     if (RuntimeEnabledFeatures::slimmingPaintEnabled()) {
         ASSERT(m_context.displayItemList());
         if (m_context.displayItemList()->displayItemConstructionIsDisabled())
             return;
-        m_context.displayItemList()->add(EndClipPathDisplayItem::create(m_client));
+        m_context.displayItemList()->createAndAppendIfNeeded<EndClipPathDisplayItem>(m_client);
     } else {
         EndClipPathDisplayItem endClipPathDisplayItem(m_client);
         endClipPathDisplayItem.replay(m_context);
     }
 }
 
 } // namespace blink