Add [WillBeGarbageCollected] to Event.idl

Source/modules/indexeddb/IDBVersionChangeEvent.cpp

Index: Source/modules/indexeddb/IDBVersionChangeEvent.cpp
diff --git a/Source/modules/indexeddb/IDBVersionChangeEvent.cpp b/Source/modules/indexeddb/IDBVersionChangeEvent.cpp
index 13a89c095d5f474a87cafbe177bcc7d692b6a36c..e489f32f0fbf7a26ffc34843380ddf3d01685e22 100644
--- a/Source/modules/indexeddb/IDBVersionChangeEvent.cpp
+++ b/Source/modules/indexeddb/IDBVersionChangeEvent.cpp
@@ -31,9 +31,9 @@
 
 namespace WebCore {
 
-PassRefPtr<IDBVersionChangeEvent> IDBVersionChangeEvent::create(PassRefPtr<IDBAny> oldVersion, PassRefPtr<IDBAny> newVersion, const AtomicString& eventType, blink::WebIDBDataLoss dataLoss, const String& dataLossMessage)
+PassRefPtrWillBeRawPtr<IDBVersionChangeEvent> IDBVersionChangeEvent::create(PassRefPtr<IDBAny> oldVersion, PassRefPtr<IDBAny> newVersion, const AtomicString& eventType, blink::WebIDBDataLoss dataLoss, const String& dataLossMessage)
 {
-    return adoptRef(new IDBVersionChangeEvent(oldVersion, newVersion, eventType, dataLoss, dataLossMessage));
+    return adoptRefWillBeRefCountedGarbageCollected(new IDBVersionChangeEvent(oldVersion, newVersion, eventType, dataLoss, dataLossMessage));
 }
 
 IDBVersionChangeEvent::IDBVersionChangeEvent(PassRefPtr<IDBAny> oldVersion, PassRefPtr<IDBAny> newVersion, const AtomicString& eventType, blink::WebIDBDataLoss dataLoss, const String& dataLossMessage)