[Slimming Paint] Blink-side contiguous allocation of display items.

Source/platform/graphics/paint/ClipPathRecorder.cpp

Index: Source/platform/graphics/paint/ClipPathRecorder.cpp
diff --git a/Source/platform/graphics/paint/ClipPathRecorder.cpp b/Source/platform/graphics/paint/ClipPathRecorder.cpp
index 65ac303a8992c0e21587aa8fee50bbfcdef1f0c5..4d98c6e17d999d04b7d81e9a2724447bb39d67c5 100644
--- a/Source/platform/graphics/paint/ClipPathRecorder.cpp
+++ b/Source/platform/graphics/paint/ClipPathRecorder.cpp
@@ -16,26 +16,26 @@ ClipPathRecorder::ClipPathRecorder(GraphicsContext& context, const DisplayItemCl
     : m_context(context)
     , m_client(client)
 {
+    BeginClipPathDisplayItem clipPathDisplayItem(m_client, clipPath);
     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()->add(clipPathDisplayItem);
     } else {
-        BeginClipPathDisplayItem clipPathDisplayItem(m_client, clipPath);
         clipPathDisplayItem.replay(m_context);
     }
 }
 
 ClipPathRecorder::~ClipPathRecorder()
 {
+    EndClipPathDisplayItem endClipPathDisplayItem(m_client);
     if (RuntimeEnabledFeatures::slimmingPaintEnabled()) {
         ASSERT(m_context.displayItemList());
         if (m_context.displayItemList()->displayItemConstructionIsDisabled())
             return;
-        m_context.displayItemList()->add(EndClipPathDisplayItem::create(m_client));
+        m_context.displayItemList()->add(endClipPathDisplayItem);
     } else {
-        EndClipPathDisplayItem endClipPathDisplayItem(m_client);
         endClipPathDisplayItem.replay(m_context);
     }
 }