Use a new Supplement constructor for Supplement<Document> (Part 1)

third_party/WebKit/Source/core/dom/Fullscreen.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2012 Apple Inc. All
  * rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved.
  * (http://www.torchmobile.com/)
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
@@ skipping 365 matching lines @@
                         UseCounter::DocumentFullscreenElementInV0Shadow);
       return element;
     }
   } else if (!toShadowRoot(scope.rootNode()).isV1()) {
     return nullptr;
   }
   return scope.adjustedElement(*element);
 }
 
 Fullscreen::Fullscreen(Document& document)
-    : ContextLifecycleObserver(&document), m_fullScreenLayoutObject(nullptr) {
+    : Supplement<Document>(document),
+      ContextLifecycleObserver(&document),
+      m_fullScreenLayoutObject(nullptr) {
   document.setHasFullscreenSupplement();
 }
 
 Fullscreen::~Fullscreen() {}
 
 Document* Fullscreen::document() {
   return toDocument(lifecycleContext());
 }
 
 void Fullscreen::contextDestroyed() {
@@ skipping 513 matching lines @@
 }
 
 DEFINE_TRACE(Fullscreen) {
   visitor->trace(m_pendingRequests);
   visitor->trace(m_fullscreenElementStack);
   Supplement<Document>::trace(visitor);
   ContextLifecycleObserver::trace(visitor);
 }
 
 }  // namespace blink