[webnfc] NFC is not required to be ActiveDOMObject.

third_party/WebKit/Source/modules/nfc/NavigatorNFC.cpp

 // Copyright 2015 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/nfc/NavigatorNFC.h"
 
 #include "core/frame/Navigator.h"
 #include "modules/nfc/NFC.h"
 
@@ skipping 11 matching lines @@
 NavigatorNFC& NavigatorNFC::from(Navigator& navigator)
 {
     NavigatorNFC* supplement = static_cast<NavigatorNFC*>(HeapSupplement<Navigator>::from(navigator, supplementName()));
     if (!supplement) {
         supplement = new NavigatorNFC();
         provideTo(navigator, supplementName(), supplement);
     }
     return *supplement;
 }
 
-NFC* NavigatorNFC::nfc(ExecutionContext* context, Navigator& navigator)
+NFC* NavigatorNFC::nfc(Navigator& navigator)
 {
     NavigatorNFC& self = NavigatorNFC::from(navigator);
     if (!self.m_nfc) {
         if (!navigator.frame())
             return nullptr;
-        self.m_nfc = NFC::create(context, navigator.frame());
+        self.m_nfc = NFC::create(navigator.frame());
     }
     return self.m_nfc.get();
 }
 
 DEFINE_TRACE(NavigatorNFC)
 {
     visitor->trace(m_nfc);
     HeapSupplement<Navigator>::trace(visitor);
 }
 
 } // namespace blink