Service Worker: Make ServiceWorkerRegistration.update() return a promise. (Blink 1/3)

Source/modules/serviceworkers/ServiceWorkerRegistration.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef ServiceWorkerRegistration_h
 #define ServiceWorkerRegistration_h
 
 #include "core/dom/ActiveDOMObject.h"
 #include "core/events/EventTarget.h"
 #include "modules/serviceworkers/ServiceWorker.h"
@@ skipping 37 matching lines @@
     static void dispose(WebServiceWorkerRegistration*);
 
     PassRefPtrWillBeRawPtr<ServiceWorker> installing() { return m_installing.get(); }
     PassRefPtrWillBeRawPtr<ServiceWorker> waiting() { return m_waiting.get(); }
     PassRefPtrWillBeRawPtr<ServiceWorker> active() { return m_active.get(); }
 
     String scope() const;
 
     WebServiceWorkerRegistration* webRegistration() { return m_outerRegistration.get(); }
 
-    void update(ScriptState*, ExceptionState&);
+    ScriptPromise update(ScriptState*);
     ScriptPromise unregister(ScriptState*);
 
     DEFINE_ATTRIBUTE_EVENT_LISTENER(updatefound);
 
     ~ServiceWorkerRegistration() override;
 
     // Eager finalization needed to promptly release owned WebServiceWorkerRegistration.
     EAGERLY_FINALIZE();
     DECLARE_VIRTUAL_TRACE();
 
@@ skipping 31 matching lines @@
     }
 
 private:
     WTF_MAKE_NONCOPYABLE(ServiceWorkerRegistrationArray);
     ServiceWorkerRegistrationArray() = delete;
 };
 
 } // namespace blink
 
 #endif // ServiceWorkerRegistration_h