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

Source/modules/geofencing/ServiceWorkerRegistrationGeofencing.cpp

Index: Source/modules/geofencing/ServiceWorkerRegistrationGeofencing.cpp
diff --git a/Source/modules/geofencing/ServiceWorkerRegistrationGeofencing.cpp b/Source/modules/geofencing/ServiceWorkerRegistrationGeofencing.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..009f0af1aee8d0e4148380242c417bf05e13140a
--- /dev/null
+++ b/Source/modules/geofencing/ServiceWorkerRegistrationGeofencing.cpp
@@ -0,0 +1,56 @@
+// 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.
+
+#include "config.h"
+#include "modules/geofencing/ServiceWorkerRegistrationGeofencing.h"
+
+#include "modules/geofencing/Geofencing.h"
+#include "modules/serviceworkers/ServiceWorkerRegistration.h"
+
+namespace blink {
+
+ServiceWorkerRegistrationGeofencing::ServiceWorkerRegistrationGeofencing(ServiceWorkerRegistration* registration)
+    : m_registration(registration)
+{
+}
+
+ServiceWorkerRegistrationGeofencing::~ServiceWorkerRegistrationGeofencing()
+{
+}
+
+const char* ServiceWorkerRegistrationGeofencing::supplementName()
+{
+    return "ServiceWorkerRegistrationGeofencing";
+}
+
+ServiceWorkerRegistrationGeofencing& ServiceWorkerRegistrationGeofencing::from(ServiceWorkerRegistration& registration)
+{
+    ServiceWorkerRegistrationGeofencing* supplement = static_cast<ServiceWorkerRegistrationGeofencing*>(HeapSupplement<ServiceWorkerRegistration>::from(registration, supplementName()));
+    if (!supplement) {
+        supplement = new ServiceWorkerRegistrationGeofencing(&registration);
+        provideTo(registration, supplementName(), supplement);
+    }
+    return *supplement;
+}
+
+Geofencing* ServiceWorkerRegistrationGeofencing::geofencing(ServiceWorkerRegistration& registration)
+{
+    return ServiceWorkerRegistrationGeofencing::from(registration).geofencing();
+}
+
+Geofencing* ServiceWorkerRegistrationGeofencing::geofencing()
+{
+    if (!m_geofencing)
+        m_geofencing = Geofencing::create(m_registration);
+    return m_geofencing.get();
+}
+
+void ServiceWorkerRegistrationGeofencing::trace(Visitor* visitor)
+{
+    visitor->trace(m_registration);
+    visitor->trace(m_geofencing);
+    HeapSupplement<ServiceWorkerRegistration>::trace(visitor);
+}
+
+} // namespace blink