CallbackPromiseAdapter types should be more compatible with WebCallbacks (3/3).

public/platform/WebServiceWorkerRegistration.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 WebServiceWorkerRegistration_h
 #define WebServiceWorkerRegistration_h
 
 #include "public/platform/WebCallbacks.h"
 #include "public/platform/WebServiceWorkerError.h"
 #include "public/platform/WebURL.h"
 
 namespace blink {
 
 class WebServiceWorkerProvider;
 class WebServiceWorkerRegistrationProxy;
 
 class WebServiceWorkerRegistration {
 public:
     virtual ~WebServiceWorkerRegistration() { }
 
-    using WebServiceWorkerUpdateCallbacks = WebCallbacks<void, WebPassOwnPtr<WebServiceWorkerError>>;
-    using WebServiceWorkerUnregistrationCallbacks = WebCallbacks<bool*, WebPassOwnPtr<WebServiceWorkerError>>;
+    using WebServiceWorkerUpdateCallbacks = WebCallbacks<void, const WebServiceWorkerError&>;
+    using WebServiceWorkerUnregistrationCallbacks = WebCallbacks<bool, const WebServiceWorkerError&>;
 
     virtual void setProxy(WebServiceWorkerRegistrationProxy*) { }
     virtual WebServiceWorkerRegistrationProxy* proxy() { return nullptr; }
     virtual void proxyStopped() { }
 
     virtual WebURL scope() const { return WebURL(); }
     // TODO(jungkees):
     // void update(p) remains temporarily before the chromium-side companion
     // patch lands: https://codereview.chromium.org/1270513002/.
     // Before the chromium-side patch lands, the new update(p, c) will
     // internally call update(provider) to work with the existing code base.
     // The final changes will be incorporated with the Blink layout patches.
     virtual void update(WebServiceWorkerProvider*) { }
     virtual void update(WebServiceWorkerProvider* provider, WebServiceWorkerUpdateCallbacks* callback)
     {
         update(provider);
         callback->onSuccess();
     }
     virtual void unregister(WebServiceWorkerProvider*, WebServiceWorkerUnregistrationCallbacks*) { }
 };
 
 } // namespace blink
 
 #endif // WebServiceWorkerRegistration_h