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

Source/core/events/NavigatorEvents.h

Index: Source/core/events/NavigatorEvents.h
diff --git a/Source/core/events/NavigatorEvents.h b/Source/core/events/NavigatorEvents.h
index c9d18e1cfec1df432ad06e8a846158daf72895a8..787d16b41893005b43abebd52e284f05a3079507 100644
--- a/Source/core/events/NavigatorEvents.h
+++ b/Source/core/events/NavigatorEvents.h
@@ -31,11 +31,14 @@
 #ifndef NavigatorEvents_h
 #define NavigatorEvents_h
 
+#include "wtf/Allocator.h"
+
 namespace blink {
 
 class Navigator;
 
 class NavigatorEvents {
+    STATIC_ONLY(NavigatorEvents);
 public:
     static long maxTouchPoints(Navigator&);
 };