Use a new Supplement constructor for (Worker)Navigator supplements

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

 // 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.
 
 #ifndef NavigatorNFC_h
 #define NavigatorNFC_h
 
 #include "core/frame/Navigator.h"
 #include "platform/Supplementable.h"
 #include "platform/heap/Handle.h"
 
 namespace blink {
 
 class NFC;
 class Navigator;
 
 class NavigatorNFC final : public GarbageCollected<NavigatorNFC>,
                            public Supplement<Navigator> {
   USING_GARBAGE_COLLECTED_MIXIN(NavigatorNFC);
 
  public:
   // Gets, or creates, NavigatorNFC supplement on Navigator.
   static NavigatorNFC& from(Navigator&);
 
   static NFC* nfc(Navigator&);
 
   DECLARE_TRACE();
 
  private:
-  NavigatorNFC();
+  explicit NavigatorNFC(Navigator&);
   static const char* supplementName();
 
   Member<NFC> m_nfc;
 };
 
 }  // namespace blink
 
 #endif  // NavigatorNFC_h