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

Source/core/events/EventFactory.h

Index: Source/core/events/EventFactory.h
diff --git a/Source/core/events/EventFactory.h b/Source/core/events/EventFactory.h
index 51c2cfa0695f127c5e2a0d138ed1c7ba9f5a505a..8764b08e2c2ea2348488f7503e3f49255d620cc9 100644
--- a/Source/core/events/EventFactory.h
+++ b/Source/core/events/EventFactory.h
@@ -27,6 +27,7 @@
 #define EventFactory_h
 
 #include "platform/heap/Handle.h"
+#include "wtf/Allocator.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/text/AtomicString.h"
 
@@ -35,6 +36,7 @@ namespace blink {
 class Event;
 
 class EventFactoryBase {
+    WTF_MAKE_FAST_ALLOCATED(EventFactory);
 public:
     virtual PassRefPtrWillBeRawPtr<Event> create(const String& eventType) = 0;
     virtual ~EventFactoryBase() { }