Have ScriptPromiseResolver on the Oilpan heap always.

Source/modules/presentation/PresentationRequest.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/PresentationRequest.h"
 
 #include "bindings/core/v8/CallbackPromiseAdapter.h"
 #include "bindings/core/v8/ExceptionState.h"
 #include "bindings/core/v8/ScriptPromise.h"
@@ skipping 50 matching lines @@
 
 bool PresentationRequest::hasPendingActivity() const
 {
     // Prevents garbage collecting of this object when not hold by another
     // object but still has listeners registered.
     return hasEventListeners();
 }
 
 ScriptPromise PresentationRequest::start(ScriptState* scriptState)
 {
-    RefPtrWillBeRawPtr<ScriptPromiseResolver> resolver = ScriptPromiseResolver::create(scriptState);
+    ScriptPromiseResolver* resolver = ScriptPromiseResolver::create(scriptState);
     ScriptPromise promise = resolver->promise();
 
     WebPresentationClient* client = presentationClient(executionContext());
     if (!client) {
         resolver->reject(DOMException::create(InvalidStateError, "The PresentationRequest is no longer associated to a frame."));
         return promise;
     }
     client->startSession(m_url.string(), new CallbackPromiseAdapter<PresentationSession, PresentationError>(resolver));
 
     return promise;
 }
 
 ScriptPromise PresentationRequest::join(ScriptState* scriptState, const String& id)
 {
-    RefPtrWillBeRawPtr<ScriptPromiseResolver> resolver = ScriptPromiseResolver::create(scriptState);
+    ScriptPromiseResolver* resolver = ScriptPromiseResolver::create(scriptState);
     ScriptPromise promise = resolver->promise();
 
     WebPresentationClient* client = presentationClient(executionContext());
     if (!client) {
         resolver->reject(DOMException::create(InvalidStateError, "The PresentationRequest is no longer associated to a frame."));
         return promise;
     }
     client->joinSession(m_url.string(), id, new CallbackPromiseAdapter<PresentationSession, PresentationError>(resolver));
 
     return promise;
 }
 
 ScriptPromise PresentationRequest::getAvailability(ScriptState* scriptState)
 {
-    RefPtrWillBeRawPtr<ScriptPromiseResolver> resolver = ScriptPromiseResolver::create(scriptState);
+    ScriptPromiseResolver* resolver = ScriptPromiseResolver::create(scriptState);
     ScriptPromise promise = resolver->promise();
 
     WebPresentationClient* client = presentationClient(executionContext());
     if (!client) {
         resolver->reject(DOMException::create(InvalidStateError, "The object is no longer associated to a frame."));
         return promise;
     }
     client->getAvailability(m_url.string(), new CallbackPromiseAdapter<PresentationAvailability, PresentationError>(resolver));
 
     return promise;
@@ skipping 10 matching lines @@
     ActiveDOMObject::trace(visitor);
 }
 
 PresentationRequest::PresentationRequest(ExecutionContext* executionContext, const KURL& url)
     : ActiveDOMObject(executionContext)
     , m_url(url)
 {
 }
 
 } // namespace blink