Have ScriptPromiseResolver on the Oilpan heap always.

Source/modules/presentation/PresentationAvailabilityCallback.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/PresentationAvailabilityCallback.h"
 
 #include "bindings/core/v8/ScriptPromiseResolver.h"
 #include "core/dom/DOMException.h"
 #include "modules/presentation/PresentationAvailability.h"
 #include "modules/presentation/PresentationError.h"
 
 namespace blink {
 
-PresentationAvailabilityCallback::PresentationAvailabilityCallback(PassRefPtrWillBeRawPtr<ScriptPromiseResolver> resolver)
+PresentationAvailabilityCallback::PresentationAvailabilityCallback(ScriptPromiseResolver* resolver)
     : m_resolver(resolver)
 {
     ASSERT(m_resolver);
 }
 
 void PresentationAvailabilityCallback::onSuccess(bool* result)
 {
     OwnPtr<bool> availability = adoptPtr(result);
     if (!m_resolver->executionContext() || m_resolver->executionContext()->activeDOMObjectsAreStopped())
         return;
     m_resolver->resolve(PresentationAvailability::take(m_resolver.get(), *availability));
 }
 
 void PresentationAvailabilityCallback::onError(WebPresentationError* result)
 {
     OwnPtr<WebPresentationError> error = adoptPtr(result);
     if (!m_resolver->executionContext() || m_resolver->executionContext()->activeDOMObjectsAreStopped())
         return;
     m_resolver->reject(PresentationError::take(*error));
 }
 
 } // namespace blink