Make classes and structures in core/events and core/fetch fast-allocated.

Source/core/events/WindowEventContext.h

Index: Source/core/events/WindowEventContext.h
diff --git a/Source/core/events/WindowEventContext.h b/Source/core/events/WindowEventContext.h
index e243b71e45c27dc689a3d912142915f18f49e7a6..65a7e258bc8c67f5fc3e118b44c665b6837e4db6 100644
--- a/Source/core/events/WindowEventContext.h
+++ b/Source/core/events/WindowEventContext.h
@@ -39,6 +39,8 @@ class Node;
 class NodeEventContext;
 
 class WindowEventContext : public NoBaseWillBeGarbageCollected<WindowEventContext> {
+    WTF_MAKE_FAST_ALLOCATED_WILL_BE_REMOVED(WindowEventContext);
+    WTF_MAKE_NONCOPYABLE(WindowEventContext);
 public:
     WindowEventContext(Event&, const NodeEventContext& topNodeEventContext);