Blink-side contiguous allocation of display items.

Source/platform/graphics/paint/FloatClipDisplayItem.h

Index: Source/platform/graphics/paint/FloatClipDisplayItem.h
diff --git a/Source/platform/graphics/paint/FloatClipDisplayItem.h b/Source/platform/graphics/paint/FloatClipDisplayItem.h
index 9aa0a866f4030b20d76e161964d14aba49b3ba0a..448a6747b305cdc995073d2f07096b9a65fa8861 100644
--- a/Source/platform/graphics/paint/FloatClipDisplayItem.h
+++ b/Source/platform/graphics/paint/FloatClipDisplayItem.h
@@ -8,20 +8,13 @@
 #include "platform/PlatformExport.h"
 #include "platform/geometry/FloatRect.h"
 #include "platform/graphics/paint/DisplayItem.h"
-#include "wtf/PassOwnPtr.h"
 
 namespace blink {
 
 class RoundedRect;
 
 class PLATFORM_EXPORT FloatClipDisplayItem : public PairedBeginDisplayItem {
-    WTF_MAKE_FAST_ALLOCATED(FloatClipDisplayItem);
 public:
-    static PassOwnPtr<FloatClipDisplayItem> create(const DisplayItemClientWrapper& client, Type type, const FloatRect& clipRect)
-    {
-        return adoptPtr(new FloatClipDisplayItem(client, type, clipRect));
-    }
-
     FloatClipDisplayItem(const DisplayItemClientWrapper& client, Type type, const FloatRect& clipRect)
         : PairedBeginDisplayItem(client, type)
         , m_clipRect(clipRect)
@@ -31,6 +24,7 @@ public:
 
     virtual void replay(GraphicsContext&) override;
     virtual void appendToWebDisplayItemList(WebDisplayItemList*) const override;
+    void appendByMoving(DisplayItems&) override;
 
 private:
 #ifndef NDEBUG
@@ -41,13 +35,7 @@ private:
 };
 
 class PLATFORM_EXPORT EndFloatClipDisplayItem : public PairedEndDisplayItem {
-    WTF_MAKE_FAST_ALLOCATED(EndFloatClipDisplayItem);
 public:
-    static PassOwnPtr<EndFloatClipDisplayItem> create(const DisplayItemClientWrapper& client, Type type)
-    {
-        return adoptPtr(new EndFloatClipDisplayItem(client, type));
-    }
-
     EndFloatClipDisplayItem(const DisplayItemClientWrapper& client, Type type)
         : PairedEndDisplayItem(client, type)
     {
@@ -56,6 +44,7 @@ public:
 
     virtual void replay(GraphicsContext&) override;
     virtual void appendToWebDisplayItemList(WebDisplayItemList*) const override;
+    void appendByMoving(DisplayItems&) override;
 
 private:
 #if ENABLE(ASSERT)