bindings: Adds virtual ScriptWrappable::wrap method.

Source/core/timing/Performance.h

Index: Source/core/timing/Performance.h
diff --git a/Source/core/timing/Performance.h b/Source/core/timing/Performance.h
index 15bc2469148cb51661a24359ba328550627e82be..e4941e1bad83b242854d10dace007f8bbe6c351c 100644
--- a/Source/core/timing/Performance.h
+++ b/Source/core/timing/Performance.h
@@ -56,6 +56,7 @@ class UserTiming;
 typedef WillBeHeapVector<RefPtrWillBeMember<PerformanceEntry> > PerformanceEntryVector;
 
 class Performance FINAL : public RefCountedWillBeGarbageCollectedFinalized<Performance>, public DOMWindowProperty, public EventTargetWithInlineData {
+    DEFINE_WRAPPERTYPEINFO();
     REFCOUNTED_EVENT_TARGET(Performance);
     WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(Performance);
 public:
@@ -108,6 +109,6 @@ private:
     RefPtrWillBeMember<UserTiming> m_userTiming;
 };
 
-}
+} // namespace blink
 
 #endif // Performance_h