blink: Cleanup class forward declarations

third_party/WebKit/Source/modules/presentation/PresentationController.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 PresentationController_h
 #define PresentationController_h
 
 #include "core/frame/DOMWindowProperty.h"
 #include "core/frame/LocalFrame.h"
 #include "modules/ModulesExport.h"
 #include "modules/presentation/Presentation.h"
 #include "modules/presentation/PresentationRequest.h"
 #include "platform/Supplementable.h"
 #include "platform/heap/Handle.h"
 #include "public/platform/modules/presentation/WebPresentationClient.h"
 #include "public/platform/modules/presentation/WebPresentationController.h"
 
 namespace blink {
 
 class PresentationConnection;
-class WebPresentationAvailabilityCallback;
 class WebPresentationConnectionClient;
 enum class WebPresentationConnectionCloseReason;
 enum class WebPresentationConnectionState;
 
 // The coordinator between the various page exposed properties and the content
 // layer represented via |WebPresentationClient|.
 class MODULES_EXPORT PresentationController final
     : public GarbageCollectedFinalized<PresentationController>,
       public Supplement<LocalFrame>,
       public DOMWindowProperty,
@@ skipping 65 matching lines @@
   // The presentation connections associated with that frame.
   // TODO(mlamouri): the PresentationController will keep any created
   // connections alive until the frame is detached. These should be weak ptr
   // so that the connection can be GC'd.
   HeapHashSet<Member<PresentationConnection>> m_connections;
 };
 
 }  // namespace blink
 
 #endif  // PresentationController_h