Blink-side contiguous allocation of display items.

Source/platform/graphics/paint/FixedPositionDisplayItem.h

Index: Source/platform/graphics/paint/FixedPositionDisplayItem.h
diff --git a/Source/platform/graphics/paint/FixedPositionDisplayItem.h b/Source/platform/graphics/paint/FixedPositionDisplayItem.h
index f3d84c44d6baed4dbd94aee6fa253fbeb99f0299..5f04fbb66352b28a622480e905b12bd7b37f608b 100644
--- a/Source/platform/graphics/paint/FixedPositionDisplayItem.h
+++ b/Source/platform/graphics/paint/FixedPositionDisplayItem.h
@@ -13,34 +13,18 @@
 namespace blink {
 
 class PLATFORM_EXPORT BeginFixedPositionDisplayItem : public PairedBeginDisplayItem {
-    WTF_MAKE_FAST_ALLOCATED(BeginFixedPositionDisplayItem);
 public:
-    static PassOwnPtr<BeginFixedPositionDisplayItem> create(const DisplayItemClientWrapper& client)
-    {
-        return adoptPtr(new BeginFixedPositionDisplayItem(client));
-    }
-
     BeginFixedPositionDisplayItem(const DisplayItemClientWrapper& client)
-        : PairedBeginDisplayItem(client, BeginFixedPosition)
-    {
-    }
+        : PairedBeginDisplayItem(client, BeginFixedPosition) { }
 
     virtual void replay(GraphicsContext&) override final { }
     virtual void appendToWebDisplayItemList(WebDisplayItemList*) const override final;
 };
 
 class PLATFORM_EXPORT EndFixedPositionDisplayItem : public PairedEndDisplayItem {
-    WTF_MAKE_FAST_ALLOCATED(EndFixedPositionDisplayItem);
 public:
-    static PassOwnPtr<EndFixedPositionDisplayItem> create(const DisplayItemClientWrapper& client)
-    {
-        return adoptPtr(new EndFixedPositionDisplayItem(client));
-    }
-
     EndFixedPositionDisplayItem(const DisplayItemClientWrapper& client)
-        : PairedEndDisplayItem(client, EndFixedPosition)
-    {
-    }
+        : PairedEndDisplayItem(client, EndFixedPosition) { }
 
     virtual void replay(GraphicsContext&) override final { }
     virtual void appendToWebDisplayItemList(WebDisplayItemList*) const override final;