Add [WillBeGarbageCollected] to Event.idl

Source/core/events/HashChangeEvent.h

Index: Source/core/events/HashChangeEvent.h
diff --git a/Source/core/events/HashChangeEvent.h b/Source/core/events/HashChangeEvent.h
index ee7d77da192283fb69e6e6856039e4099686fcb8..19017a10c0a5c4beb2c0c32131bdb09832c901de 100644
--- a/Source/core/events/HashChangeEvent.h
+++ b/Source/core/events/HashChangeEvent.h
@@ -37,19 +37,19 @@ struct HashChangeEventInit : public EventInit {
 
 class HashChangeEvent FINAL : public Event {
 public:
-    static PassRefPtr<HashChangeEvent> create()
+    static PassRefPtrWillBeRawPtr<HashChangeEvent> create()
     {
-        return adoptRef(new HashChangeEvent);
+        return adoptRefCountedWillBeRefCountedGarbageCollected(new HashChangeEvent);
     }
 
-    static PassRefPtr<HashChangeEvent> create(const String& oldURL, const String& newURL)
+    static PassRefPtrWillBeRawPtr<HashChangeEvent> create(const String& oldURL, const String& newURL)
     {
-        return adoptRef(new HashChangeEvent(oldURL, newURL));
+        return adoptRefCountedWillBeRefCountedGarbageCollected(new HashChangeEvent(oldURL, newURL));
     }
 
-    static PassRefPtr<HashChangeEvent> create(const AtomicString& type, const HashChangeEventInit& initializer)
+    static PassRefPtrWillBeRawPtr<HashChangeEvent> create(const AtomicString& type, const HashChangeEventInit& initializer)
     {
-        return adoptRef(new HashChangeEvent(type, initializer));
+        return adoptRefCountedWillBeRefCountedGarbageCollected(new HashChangeEvent(type, initializer));
     }
 
     void initHashChangeEvent(const AtomicString& eventType, bool canBubble, bool cancelable, const String& oldURL, const String& newURL)