Use a new Supplement constructor for (Worker)Navigator supplements

third_party/WebKit/Source/modules/mediastream/NavigatorUserMedia.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 NavigatorUserMedia_h
 #define NavigatorUserMedia_h
 
 #include "core/frame/Navigator.h"
 #include "platform/Supplementable.h"
 #include "platform/heap/Handle.h"
 
 namespace blink {
 
-class ExecutionContext;
 class Navigator;
 class MediaDevices;
 
 class NavigatorUserMedia final : public GarbageCollected<NavigatorUserMedia>,
                                  public Supplement<Navigator> {
   USING_GARBAGE_COLLECTED_MIXIN(NavigatorUserMedia)
  public:
   static MediaDevices* mediaDevices(Navigator&);
   DECLARE_VIRTUAL_TRACE();
 
  private:
-  explicit NavigatorUserMedia(ExecutionContext*);
+  explicit NavigatorUserMedia(Navigator&);
   MediaDevices* getMediaDevices();
   static const char* supplementName();
   static NavigatorUserMedia& from(Navigator&);
 
   Member<MediaDevices> m_mediaDevices;
 };
 
 }  // namespace blink
 
 #endif