Presentation API: Blink changes to allow getAvailability() to be rejected.

Source/modules/presentation/PresentationSession.h

 // 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 PresentationSession_h
 #define PresentationSession_h
 
 #include "core/events/EventTarget.h"
 #include "core/fileapi/Blob.h"
 #include "core/fileapi/FileError.h"
@@ skipping 14 matching lines @@
 class PresentationController;
 
 class PresentationSession final
     : public RefCountedGarbageCollectedEventTargetWithInlineData<PresentationSession>
     , public DOMWindowProperty {
     REFCOUNTED_GARBAGE_COLLECTED_EVENT_TARGET(PresentationSession);
     WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(PresentationSession);
     DEFINE_WRAPPERTYPEINFO();
 public:
     static PresentationSession* take(WebPresentationSessionClient*, Presentation*);
-    static void dispose(WebPresentationSessionClient*);
     virtual ~PresentationSession();
 
     // EventTarget implementation.
     virtual const AtomicString& interfaceName() const override;
     virtual ExecutionContext* executionContext() const override;
 
     DECLARE_VIRTUAL_TRACE();
 
     const String id() const { return m_id; }
     const WTF::AtomicString& state() const;
@@ skipping 63 matching lines @@
     WebPresentationSessionState m_state;
 
     // For Blob data handling.
     Member<BlobLoader> m_blobLoader;
     Deque<OwnPtr<Message>> m_messages;
 };
 
 } // namespace blink
 
 #endif // PresentationSession_h