Blink-side contiguous allocation of display items.

Source/core/paint/TransformRecorder.cpp

Index: Source/core/paint/TransformRecorder.cpp
diff --git a/Source/core/paint/TransformRecorder.cpp b/Source/core/paint/TransformRecorder.cpp
index fb96a941228b0fbed9bb6c0919fb17b6c7d08ed9..62b963529f0044b3a81ce0ff9f090c431c39ed1a 100644
--- a/Source/core/paint/TransformRecorder.cpp
+++ b/Source/core/paint/TransformRecorder.cpp
@@ -25,7 +25,7 @@ TransformRecorder::TransformRecorder(GraphicsContext& context, const DisplayItem
         ASSERT(m_context.displayItemList());
         if (m_context.displayItemList()->displayItemConstructionIsDisabled())
             return;
-        m_context.displayItemList()->add(BeginTransformDisplayItem::create(m_client, transform));
+        m_context.displayItemList()->createAndAppendIfNeeded<BeginTransformDisplayItem>(m_client, transform);
     } else {
         BeginTransformDisplayItem beginTransform(m_client, transform);
         beginTransform.replay(m_context);
@@ -41,7 +41,7 @@ TransformRecorder::~TransformRecorder()
         ASSERT(m_context.displayItemList());
         if (m_context.displayItemList()->displayItemConstructionIsDisabled())
             return;
-        m_context.displayItemList()->add(EndTransformDisplayItem::create(m_client));
+        m_context.displayItemList()->createAndAppendIfNeeded<EndTransformDisplayItem>(m_client);
     } else {
         EndTransformDisplayItem endTransform(m_client);
         endTransform.replay(m_context);