Convert unnecessary ContextLifecycleObservers into ContextClients.

third_party/WebKit/Source/modules/presentation/PresentationRequest.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 PresentationRequest_h
 #define PresentationRequest_h
 
 #include "bindings/core/v8/ActiveScriptWrappable.h"
 #include "bindings/core/v8/ScriptPromise.h"
 #include "core/dom/ContextLifecycleObserver.h"
 #include "core/events/EventTarget.h"
 #include "modules/ModulesExport.h"
 #include "modules/presentation/PresentationPromiseProperty.h"
 #include "platform/heap/Handle.h"
 #include "platform/heap/Heap.h"
 #include "platform/weborigin/KURL.h"
 #include "wtf/Vector.h"
 
 namespace blink {
 
 // Implements the PresentationRequest interface from the Presentation API from
 // which websites can start or join presentation connections.
 class MODULES_EXPORT PresentationRequest final
     : public EventTargetWithInlineData,
       public ActiveScriptWrappable<PresentationRequest>,
-      public ContextLifecycleObserver {
+      public ContextClient {
   USING_GARBAGE_COLLECTED_MIXIN(PresentationRequest);
   DEFINE_WRAPPERTYPEINFO();
 
  public:
   ~PresentationRequest() = default;
 
   static PresentationRequest* create(ExecutionContext*,
                                      const String& url,
                                      ExceptionState&);
   static PresentationRequest* create(ExecutionContext*,
@@ skipping 27 matching lines @@
 
   void recordOriginTypeAccess(ExecutionContext*) const;
 
   Member<PresentationAvailabilityProperty> m_availabilityProperty;
   Vector<KURL> m_urls;
 };
 
 }  // namespace blink
 
 #endif  // PresentationRequest_h