Push API: rename registration to subscription.

Source/modules/push_messaging/PushRegistrationCallbacks.h

Index: Source/modules/push_messaging/PushRegistrationCallbacks.h
diff --git a/Source/modules/push_messaging/PushRegistrationCallbacks.h b/Source/modules/push_messaging/PushRegistrationCallbacks.h
deleted file mode 100644
index 7f93d27205d7e20b43a098da59f3e7200468fcde..0000000000000000000000000000000000000000
--- a/Source/modules/push_messaging/PushRegistrationCallbacks.h
+++ /dev/null
@@ -1,41 +0,0 @@
-// 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 PushRegistrationCallbacks_h
-#define PushRegistrationCallbacks_h
-
-#include "platform/heap/Handle.h"
-#include "public/platform/WebCallbacks.h"
-#include "wtf/Noncopyable.h"
-#include "wtf/PassRefPtr.h"
-#include "wtf/RefPtr.h"
-
-namespace blink {
-
-class ServiceWorkerRegistration;
-class ScriptPromiseResolver;
-struct WebPushError;
-struct WebPushRegistration;
-
-// PushRegistrationCallbacks is an implementation of WebPushRegistrationCallbacks
-// that will resolve the underlying promise depending on the result passed to
-// the callback. It takes a ServiceWorkerRegistration in its constructor and
-// will pass it to the PushRegistration.
-class PushRegistrationCallbacks final : public WebCallbacks<WebPushRegistration, WebPushError> {
-    WTF_MAKE_NONCOPYABLE(PushRegistrationCallbacks);
-public:
-    PushRegistrationCallbacks(PassRefPtrWillBeRawPtr<ScriptPromiseResolver>, ServiceWorkerRegistration*);
-    ~PushRegistrationCallbacks() override;
-
-    void onSuccess(WebPushRegistration*) override;
-    void onError(WebPushError*) override;
-
-private:
-    RefPtrWillBePersistent<ScriptPromiseResolver> m_resolver;
-    Persistent<ServiceWorkerRegistration> m_serviceWorkerRegistration;
-};
-
-} // namespace blink
-
-#endif // PushRegistrationCallbacks_h