bindings: Adds virtual ScriptWrappable::wrap method.

Source/modules/speech/SpeechSynthesisUtterance.h

Index: Source/modules/speech/SpeechSynthesisUtterance.h
diff --git a/Source/modules/speech/SpeechSynthesisUtterance.h b/Source/modules/speech/SpeechSynthesisUtterance.h
index c40bcfb8234a95d57427152b6f973b6addef7d52..269f60a1572d40145736d0cd9cb2b78911546e74 100644
--- a/Source/modules/speech/SpeechSynthesisUtterance.h
+++ b/Source/modules/speech/SpeechSynthesisUtterance.h
@@ -36,6 +36,7 @@ namespace blink {
 
 class SpeechSynthesisUtterance FINAL : public RefCountedGarbageCollectedWillBeGarbageCollectedFinalized<SpeechSynthesisUtterance>, public PlatformSpeechSynthesisUtteranceClient, public ContextLifecycleObserver, public EventTargetWithInlineData {
     DEFINE_EVENT_TARGET_REFCOUNTING_WILL_BE_REMOVED(RefCountedGarbageCollected<SpeechSynthesisUtterance>);
+    DEFINE_WRAPPERTYPEINFO();
     USING_GARBAGE_COLLECTED_MIXIN(SpeechSynthesisUtterance);
 public:
     static SpeechSynthesisUtterance* create(ExecutionContext*, const String&);