ActiveScriptWrappable: GC wrappers in detached ExecutionContexts.

third_party/WebKit/Source/modules/presentation/PresentationAvailability.cpp

 // 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.
 
 #include "modules/presentation/PresentationAvailability.h"
 
 #include "bindings/core/v8/ScriptPromiseResolver.h"
 #include "core/dom/Document.h"
 #include "core/events/Event.h"
 #include "core/frame/UseCounter.h"
@@ skipping 29 matching lines @@
       new PresentationAvailability(resolver->getExecutionContext(), url, value);
   presentationAvailability->suspendIfNeeded();
   presentationAvailability->updateListening();
   return presentationAvailability;
 }
 
 PresentationAvailability::PresentationAvailability(
     ExecutionContext* executionContext,
     const KURL& url,
     bool value)
-    : ActiveScriptWrappable(this),
+    : ActiveScriptWrappable<PresentationAvailability>(this),
       SuspendableObject(executionContext),
       PageVisibilityObserver(toDocument(executionContext)->page()),
       m_url(url),
       m_value(value),
       m_state(State::Active) {
   ASSERT(executionContext->isDocument());
 }
 
 PresentationAvailability::~PresentationAvailability() {}
 
@@ skipping 70 matching lines @@
   return m_value;
 }
 
 DEFINE_TRACE(PresentationAvailability) {
   EventTargetWithInlineData::trace(visitor);
   PageVisibilityObserver::trace(visitor);
   SuspendableObject::trace(visitor);
 }
 
 }  // namespace blink