Presentation API: implement .getAvalability() (Blink side).

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 31 matching lines @@
 {
     return static_cast<PresentationController*>(WillBeHeapSupplement<LocalFrame>::from(frame, supplementName()));
 }
 
 // static
 void PresentationController::provideTo(LocalFrame& frame, WebPresentationClient* client)
 {
     WillBeHeapSupplement<LocalFrame>::provideTo(frame, PresentationController::supplementName(), PresentationController::create(frame, client));
 }
 
+WebPresentationClient* PresentationController::client()
+{
+    return m_client;
+}
+
 DEFINE_TRACE(PresentationController)
 {
     visitor->trace(m_presentation);
     WillBeHeapSupplement<LocalFrame>::trace(visitor);
     LocalFrameLifecycleObserver::trace(visitor);
 }
 
 void PresentationController::didChangeAvailability(bool available)
 {
-    if (m_presentation)
-        m_presentation->didChangeAvailability(available);
 }
 
 bool PresentationController::isAvailableChangeWatched() const
 {
-    if (!m_presentation)
-        return false;
-    return m_presentation->isAvailableChangeWatched();
-}
-
-void PresentationController::updateAvailableChangeWatched(bool watched)
-{
-    if (m_client)
-        m_client->updateAvailableChangeWatched(watched);
+    return false;
 }
 
 void PresentationController::didStartDefaultSession(WebPresentationSessionClient* sessionClient)
 {
     if (!m_presentation) {
         PresentationSession::dispose(sessionClient);
         return;
     }
 
     PresentationSession* session = PresentationSession::take(sessionClient, m_presentation);
@@ skipping 55 matching lines @@
     m_client->sendBlobData(presentationUrl, presentationId, data, length);
 }
 
 void PresentationController::closeSession(const String& url, const String& presentationId)
 {
     if (!m_client)
         return;
     m_client->closeSession(url, presentationId);
 }
 
+void PresentationController::getAvailability(const String& presentationUrl, WebPresentationAvailabilityCallbacks* callbacks)
+{
+    if (!m_client)
+        return;
+    m_client->getAvailability(presentationUrl, callbacks);
+}
+
 void PresentationController::setPresentation(Presentation* presentation)
 {
     m_presentation = presentation;
 }
 
 void PresentationController::willDetachFrameHost()
 {
     if (m_client) {
         m_client->setController(nullptr);
         m_client = nullptr;
     }
 }
 
 } // namespace blink