Add [WillBeGarbageCollected] to Event.idl

Source/modules/indexeddb/IDBVersionChangeEvent.h

Index: Source/modules/indexeddb/IDBVersionChangeEvent.h
diff --git a/Source/modules/indexeddb/IDBVersionChangeEvent.h b/Source/modules/indexeddb/IDBVersionChangeEvent.h
index 5ef44491211cd39a6ba6026446dd510b6ad853bf..96181512ec903a635ea30b8016a76c52c0d381ce 100644
--- a/Source/modules/indexeddb/IDBVersionChangeEvent.h
+++ b/Source/modules/indexeddb/IDBVersionChangeEvent.h
@@ -47,17 +47,17 @@ struct IDBVersionChangeEventInit : public EventInit {
 
 class IDBVersionChangeEvent FINAL : public Event {
 public:
-    static PassRefPtr<IDBVersionChangeEvent> create()
+    static PassRefPtrWillBeRawPtr<IDBVersionChangeEvent> create()
     {
-        return adoptRef(new IDBVersionChangeEvent());
+        return adoptRefWillBeRefCountedGarbageCollected(new IDBVersionChangeEvent());
     }
-    static PassRefPtr<IDBVersionChangeEvent> create(const AtomicString& eventType, unsigned long long oldVersion, const Nullable<unsigned long long>& newVersion, blink::WebIDBDataLoss dataLoss = blink::WebIDBDataLossNone, const String& dataLossMessage = String())
+    static PassRefPtrWillBeRawPtr<IDBVersionChangeEvent> create(const AtomicString& eventType, unsigned long long oldVersion, const Nullable<unsigned long long>& newVersion, blink::WebIDBDataLoss dataLoss = blink::WebIDBDataLossNone, const String& dataLossMessage = String())
     {
-        return adoptRef(new IDBVersionChangeEvent(eventType, oldVersion, newVersion, dataLoss, dataLossMessage));
+        return adoptRefWillBeRefCountedGarbageCollected(new IDBVersionChangeEvent(eventType, oldVersion, newVersion, dataLoss, dataLossMessage));
     }
-    static PassRefPtr<IDBVersionChangeEvent> create(const AtomicString& eventType, const IDBVersionChangeEventInit& initializer)
+    static PassRefPtrWillBeRawPtr<IDBVersionChangeEvent> create(const AtomicString& eventType, const IDBVersionChangeEventInit& initializer)
     {
-        return adoptRef(new IDBVersionChangeEvent(eventType, initializer));
+        return adoptRefWillBeRefCountedGarbageCollected(new IDBVersionChangeEvent(eventType, initializer));
     }
 
     unsigned long long oldVersion() const { return m_oldVersion; }