| // Copyright 2014 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 NavigatorPresentation_h | 
 | #define NavigatorPresentation_h | 
 |  | 
 | #include "core/frame/Navigator.h" | 
 | #include "platform/Supplementable.h" | 
 | #include "platform/heap/Handle.h" | 
 |  | 
 | namespace blink { | 
 |  | 
 | class Navigator; | 
 | class Presentation; | 
 |  | 
 | class NavigatorPresentation final | 
 |     : public GarbageCollected<NavigatorPresentation>, | 
 |       public Supplement<Navigator> { | 
 |   USING_GARBAGE_COLLECTED_MIXIN(NavigatorPresentation); | 
 |  | 
 |  public: | 
 |   static const char kSupplementName[]; | 
 |  | 
 |   static NavigatorPresentation& From(Navigator&); | 
 |   static Presentation* presentation(Navigator&); | 
 |  | 
 |   virtual void Trace(blink::Visitor*); | 
 |  | 
 |  private: | 
 |   NavigatorPresentation(); | 
 |  | 
 |   Presentation* presentation(); | 
 |  | 
 |   Member<Presentation> presentation_; | 
 | }; | 
 |  | 
 | }  // namespace blink | 
 |  | 
 | #endif  // NavigatorPresentation_h |