Push API: rename registration to subscription.

public/platform/WebPushProvider.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 WebPushProvider_h
 #define WebPushProvider_h
 
 #include "public/platform/WebCallbacks.h"
 #include "public/platform/WebCommon.h"
 #include "public/platform/WebPushPermissionStatus.h"
 
 namespace blink {
 
 class WebServiceWorkerRegistration;
 struct WebPushError;
-struct WebPushRegistration;
+struct WebPushSubscription;
 
-typedef WebCallbacks<WebPushRegistration, WebPushError> WebPushRegistrationCallbacks;
-typedef WebCallbacks<WebPushPermissionStatus, void> WebPushPermissionStatusCallbacks;
-typedef WebCallbacks<bool, WebPushError> WebPushUnregisterCallbacks;
+using WebPushSubscriptionCallbacks = WebCallbacks<WebPushSubscription, WebPushError>;
+// FIXME: Remove when no longer used by the embedder - https://crbug.com/446883.
+using WebPushRegistrationCallbacks = WebPushSubscriptionCallbacks;
+using WebPushPermissionStatusCallbacks = WebCallbacks<WebPushPermissionStatus, void>;
+using WebPushUnsubscribeCallbacks = WebCallbacks<bool, WebPushError>;
+// FIXME: Remove when no longer used by the embedder - https://crbug.com/446883.
+using WebPushUnregisterCallbacks = WebPushUnsubscribeCallbacks;
 
 class WebPushProvider {
 public:
     virtual ~WebPushProvider() { }
 
     // Takes ownership of the WebPushRegistrationCallbacks.
     // Does not take ownership of the WebServiceWorkerRegistration.
     virtual void registerPushMessaging(WebServiceWorkerRegistration*, WebPushRegistrationCallbacks*) { BLINK_ASSERT_NOT_REACHED(); }
 
     // Takes ownership of the WebPushRegistrationCallbacks.
     // Does not take ownership of the WebServiceWorkerRegistration.
     virtual void getRegistration(WebServiceWorkerRegistration*, WebPushRegistrationCallbacks*) { BLINK_ASSERT_NOT_REACHED(); }
 
     // Takes ownership of the WebPushPermissionStatusCallbacks.
     // Does not take ownership of the WebServiceWorkerRegistration.
     virtual void getPermissionStatus(WebServiceWorkerRegistration*, WebPushPermissionStatusCallbacks*) { BLINK_ASSERT_NOT_REACHED(); }
 
     // Takes ownership if the WebPushUnregisterCallbacks.
     // Does not take ownership of the WebServiceWorkerRegistration.
     virtual void unregister(WebServiceWorkerRegistration*, WebPushUnregisterCallbacks* callback) { BLINK_ASSERT_NOT_REACHED(); }
 };
 
 } // namespace blink
 
 #endif // WebPushProvider_h