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 b1dc2f8da27effd845cf808699b8e5ad99960b50..ea6707178d353c5c880e30a61f6fd7de285d76bd 100644
--- a/Source/core/events/HashChangeEvent.h
+++ b/Source/core/events/HashChangeEvent.h
@@ -36,19 +36,19 @@ struct HashChangeEventInit : public EventInit {
 
 class HashChangeEvent FINAL : public Event {
 public:
-    static PassRefPtr<HashChangeEvent> create()
+    static PassRefPtrWillBeRawPtr<HashChangeEvent> create()
     {
-        return adoptRef(new HashChangeEvent);
+        return adoptRefWillBeRefCountedGarbageCollected(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 adoptRefWillBeRefCountedGarbageCollected(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 adoptRefWillBeRefCountedGarbageCollected(new HashChangeEvent(type, initializer));
     }
 
     void initHashChangeEvent(const AtomicString& eventType, bool canBubble, bool cancelable, const String& oldURL, const String& newURL)