Add [WillBeGarbageCollected] to Event.idl

Source/core/events/ProgressEvent.h

Index: Source/core/events/ProgressEvent.h
diff --git a/Source/core/events/ProgressEvent.h b/Source/core/events/ProgressEvent.h
index 337a9a89c4d37386ea3ddb2b899abff2b7462f53..a69945d104c5b1ed4a2ea93961f3de0bf76ba00f 100644
--- a/Source/core/events/ProgressEvent.h
+++ b/Source/core/events/ProgressEvent.h
@@ -40,17 +40,17 @@ struct ProgressEventInit : public EventInit {
 
 class ProgressEvent : public Event {
 public:
-    static PassRefPtr<ProgressEvent> create()
+    static PassRefPtrWillBeRawPtr<ProgressEvent> create()
     {
-        return adoptRef(new ProgressEvent);
+        return adoptRefWillBeRefCountedGarbageCollected(new ProgressEvent);
     }
-    static PassRefPtr<ProgressEvent> create(const AtomicString& type, bool lengthComputable, unsigned long long loaded, unsigned long long total)
+    static PassRefPtrWillBeRawPtr<ProgressEvent> create(const AtomicString& type, bool lengthComputable, unsigned long long loaded, unsigned long long total)
     {
-        return adoptRef(new ProgressEvent(type, lengthComputable, loaded, total));
+        return adoptRefWillBeRefCountedGarbageCollected(new ProgressEvent(type, lengthComputable, loaded, total));
     }
-    static PassRefPtr<ProgressEvent> create(const AtomicString& type, const ProgressEventInit& initializer)
+    static PassRefPtrWillBeRawPtr<ProgressEvent> create(const AtomicString& type, const ProgressEventInit& initializer)
     {
-        return adoptRef(new ProgressEvent(type, initializer));
+        return adoptRefWillBeRefCountedGarbageCollected(new ProgressEvent(type, initializer));
     }
 
     bool lengthComputable() const { return m_lengthComputable; }