Blink side of exposing the service worker registration associated with geofencing API calls.

Source/modules/geofencing/NavigatorGeofencing.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 NavigatorGeofencing_h
-#define NavigatorGeofencing_h
-
-#include "platform/Supplementable.h"
-#include "platform/heap/Handle.h"
-
-namespace blink {
-
-class Geofencing;
-class Navigator;
-
-class NavigatorGeofencing final
-    : public NoBaseWillBeGarbageCollectedFinalized<NavigatorGeofencing>
-    , public WillBeHeapSupplement<Navigator> {
-    WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(NavigatorGeofencing);
-
-public:
-    virtual ~NavigatorGeofencing();
-    static NavigatorGeofencing& from(Navigator&);
-
-    static Geofencing* geofencing(Navigator&);
-    Geofencing* geofencing();
-
-    virtual void trace(Visitor*) override;
-
-private:
-    NavigatorGeofencing();
-    static const char* supplementName();
-
-    PersistentWillBeMember<Geofencing> m_geofencing;
-};
-
-} // namespace blink
-
-#endif // NavigatorGeofencing_h