Presentation API: cleanup leftovers from .getAvailability() changes.

Source/modules/presentation/PresentationController.cpp

 // 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.
 
 #include "config.h"
 #include "modules/presentation/PresentationController.h"
 
 #include "core/frame/LocalFrame.h"
 #include "modules/presentation/PresentationSession.h"
 #include "public/platform/modules/presentation/WebPresentationClient.h"
@@ skipping 43 matching lines @@
     return m_client;
 }
 
 DEFINE_TRACE(PresentationController)
 {
     visitor->trace(m_presentation);
     WillBeHeapSupplement<LocalFrame>::trace(visitor);
     LocalFrameLifecycleObserver::trace(visitor);
 }
 
-void PresentationController::didChangeAvailability(bool available)
-{
-}
-
-bool PresentationController::isAvailableChangeWatched() const
-{
-    return false;
-}
-
 void PresentationController::didStartDefaultSession(WebPresentationSessionClient* sessionClient)
 {
     if (!m_presentation) {
         PresentationSession::dispose(sessionClient);
         return;
     }
 
     PresentationSession* session = PresentationSession::take(sessionClient, m_presentation);
     m_presentation->didStartDefaultSession(session);
 }
@@ skipping 74 matching lines @@
 
 void PresentationController::willDetachFrameHost()
 {
     if (m_client) {
         m_client->setController(nullptr);
         m_client = nullptr;
     }
 }
 
 } // namespace blink