Make classes and structures in core/page fast-allocated.

Source/core/page/AutoscrollController.h

Index: Source/core/page/AutoscrollController.h
diff --git a/Source/core/page/AutoscrollController.h b/Source/core/page/AutoscrollController.h
index 1055c0ca79016185130c40dfdbe9338008d2cc1e..c4998fe042094d6c6c40acfffe17a37215948bb3 100644
--- a/Source/core/page/AutoscrollController.h
+++ b/Source/core/page/AutoscrollController.h
@@ -53,6 +53,7 @@ enum AutoscrollType {
 
 // AutscrollController handels autoscroll and pan scroll for EventHandler.
 class CORE_EXPORT AutoscrollController final : public NoBaseWillBeGarbageCollected<AutoscrollController> {
+    WTF_MAKE_FAST_ALLOCATED_WILL_BE_REMOVED(AutoscrollController);
 public:
     static PassOwnPtrWillBeRawPtr<AutoscrollController> create(Page&);
     DECLARE_TRACE();