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

Source/modules/geofencing/ServiceWorkerRegistrationGeofencing.h

Index: Source/modules/geofencing/ServiceWorkerRegistrationGeofencing.h
diff --git a/Source/modules/geofencing/ServiceWorkerRegistrationGeofencing.h b/Source/modules/geofencing/ServiceWorkerRegistrationGeofencing.h
new file mode 100644
index 0000000000000000000000000000000000000000..e6aab4e955f37817b60a453019ecde6bb3e8e6cf
--- /dev/null
+++ b/Source/modules/geofencing/ServiceWorkerRegistrationGeofencing.h
@@ -0,0 +1,38 @@
+// 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 ServiceWorkerRegistrationGeofencing_h
+#define ServiceWorkerRegistrationGeofencing_h
+
+#include "platform/Supplementable.h"
+#include "platform/heap/Handle.h"
+
+namespace blink {
+
+class Geofencing;
+class ServiceWorkerRegistration;
+
+class ServiceWorkerRegistrationGeofencing final : public GarbageCollectedFinalized<ServiceWorkerRegistrationGeofencing>, public HeapSupplement<ServiceWorkerRegistration> {
+    USING_GARBAGE_COLLECTED_MIXIN(ServiceWorkerRegistrationGeofencing);
+    WTF_MAKE_NONCOPYABLE(ServiceWorkerRegistrationGeofencing);
+public:
+    virtual ~ServiceWorkerRegistrationGeofencing();
+    static ServiceWorkerRegistrationGeofencing& from(ServiceWorkerRegistration&);
+
+    static Geofencing* geofencing(ServiceWorkerRegistration&);
+    Geofencing* geofencing();
+
+    virtual void trace(Visitor*) override;
+
+private:
+    explicit ServiceWorkerRegistrationGeofencing(ServiceWorkerRegistration*);
+    static const char* supplementName();
+
+    Member<ServiceWorkerRegistration> m_registration;
+    Member<Geofencing> m_geofencing;
+};
+
+} // namespace blink
+
+#endif // ServiceWorkerRegistrationGeofencing_h