Make classes and structures in core/workers, core/timing and core/testing fast-allocated.

Source/core/timing/DOMWindowPerformance.h

Index: Source/core/timing/DOMWindowPerformance.h
diff --git a/Source/core/timing/DOMWindowPerformance.h b/Source/core/timing/DOMWindowPerformance.h
index ada67c5e423bc7c88db22f477293855187f01949..4461249a7d5c94cdbca2f7b1aed1f81764118e00 100644
--- a/Source/core/timing/DOMWindowPerformance.h
+++ b/Source/core/timing/DOMWindowPerformance.h
@@ -20,6 +20,7 @@ class CORE_EXPORT DOMWindowPerformance final : public NoBaseWillBeGarbageCollect
     WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(DOMWindowPerformance);
     DECLARE_EMPTY_VIRTUAL_DESTRUCTOR_WILL_BE_REMOVED(DOMWindowPerformance);
     WTF_MAKE_NONCOPYABLE(DOMWindowPerformance);
+    WTF_MAKE_FAST_ALLOCATED_WILL_BE_REMOVED(DOMWindowPerformance);
 public:
     static DOMWindowPerformance& from(LocalDOMWindow&);
     static Performance* performance(DOMWindow&);