MediaSession should use ContextClient instead of ContextLifecycleObserver

third_party/WebKit/Source/modules/mediasession/MediaSession.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 MediaSession_h
 #define MediaSession_h
 
 #include "bindings/core/v8/ScriptWrappable.h"
 #include "core/dom/ContextLifecycleObserver.h"
 #include "core/events/EventTarget.h"
 #include "modules/ModulesExport.h"
 #include "mojo/public/cpp/bindings/binding.h"
 #include "platform/heap/Handle.h"
 #include "public/platform/modules/mediasession/media_session.mojom-blink.h"
 #include <memory>
 
 namespace blink {
 
 class ExecutionContext;
 class MediaMetadata;
 
 class MODULES_EXPORT MediaSession final
     : public EventTargetWithInlineData,
-      public ContextLifecycleObserver,
+      public ContextClient,
       blink::mojom::blink::MediaSessionClient {
   USING_GARBAGE_COLLECTED_MIXIN(MediaSession);
   DEFINE_WRAPPERTYPEINFO();
   USING_PRE_FINALIZER(MediaSession, dispose);
 
  public:
   static MediaSession* create(ExecutionContext*);
 
   void dispose();
 
@@ skipping 42 matching lines @@
 
   mojom::blink::MediaSessionPlaybackState m_playbackState;
   Member<MediaMetadata> m_metadata;
   mojom::blink::MediaSessionServicePtr m_service;
   mojo::Binding<blink::mojom::blink::MediaSessionClient> m_clientBinding;
 };
 
 }  // namespace blink
 
 #endif  // MediaSession_h