Supplement should have a Member to the corresponding Supplementable object

third_party/WebKit/Source/modules/donottrack/NavigatorDoNotTrack.h

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 14 matching lines @@
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef NavigatorDoNotTrack_h
 #define NavigatorDoNotTrack_h
 
 #include "core/dom/ContextLifecycleObserver.h"
+#include "core/frame/Navigator.h"
 #include "platform/Supplementable.h"
 #include "platform/heap/Handle.h"
 #include "wtf/text/WTFString.h"
 
 namespace blink {
 
 class LocalFrame;
 class Navigator;
 
 class NavigatorDoNotTrack final : public GarbageCollected<NavigatorDoNotTrack>,
@@ skipping 10 matching lines @@
   DECLARE_VIRTUAL_TRACE();
 
  private:
   explicit NavigatorDoNotTrack(LocalFrame*);
   static const char* supplementName();
 };
 
 }  // namespace blink
 
 #endif  // NavigatorDoNotTrack_h