ExtendableEvent and InstallEvent should have an EventConstructor

Source/modules/serviceworkers/InstallEvent.cpp

 /*
  * Copyright (C) 2014 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 24 matching lines @@
 #include "wtf/RefPtr.h"
 #include <v8.h>
 
 namespace blink {
 
 PassRefPtrWillBeRawPtr<InstallEvent> InstallEvent::create()
 {
     return adoptRefWillBeNoop(new InstallEvent());
 }
 
-PassRefPtrWillBeRawPtr<InstallEvent> InstallEvent::create(const AtomicString& type, const EventInit& initializer, WaitUntilObserver* observer)
+PassRefPtrWillBeRawPtr<InstallEvent> InstallEvent::create(const AtomicString& type, const InstallEventInit& initializer)
+{
+    return adoptRefWillBeNoop(new InstallEvent(type, initializer));
+}
+
+PassRefPtrWillBeRawPtr<InstallEvent> InstallEvent::create(const AtomicString& type, const InstallEventInit& initializer, WaitUntilObserver* observer)
 {
     return adoptRefWillBeNoop(new InstallEvent(type, initializer, observer));
 }
 
 const AtomicString& InstallEvent::interfaceName() const
 {
     return EventNames::InstallEvent;
 }
 
 InstallEvent::InstallEvent()
 {
 }
 
-InstallEvent::InstallEvent(const AtomicString& type, const EventInit& initializer, WaitUntilObserver* observer)
+InstallEvent::InstallEvent(const AtomicString& type, const InstallEventInit& initializer)
+    : ExtendableEvent(type, initializer)
+{
+}
+
+InstallEvent::InstallEvent(const AtomicString& type, const InstallEventInit& initializer, WaitUntilObserver* observer)
     : ExtendableEvent(type, initializer, observer)
 {
 }
 
 void InstallEvent::trace(Visitor* visitor)
 {
     ExtendableEvent::trace(visitor);
 }
 
 } // namespace blink