Have ScriptPromiseResolver on the Oilpan heap always.

Source/modules/navigatorconnect/AcceptConnectionObserver.h

 // 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.
 
 #ifndef AcceptConnectionObserver_h
 #define AcceptConnectionObserver_h
 
 #include "bindings/core/v8/ScriptPromiseResolver.h"
 #include "core/dom/ContextLifecycleObserver.h"
 #include "modules/ModulesExport.h"
@@ skipping 35 matching lines @@
 
 private:
     class ThenFunction;
 
     AcceptConnectionObserver(ServicePortCollection*, PassOwnPtr<WebServicePortConnectEventCallbacks>, WebServicePortID, const KURL& targetURL);
 
     OwnPtr<WebServicePortConnectEventCallbacks> m_callbacks;
     Member<ServicePortCollection> m_collection;
     WebServicePortID m_portID;
     KURL m_targetURL;
-    RefPtrWillBeMember<ScriptPromiseResolver> m_resolver;
+    Member<ScriptPromiseResolver> m_resolver;
 
     enum State { Initial, Pending, Done };
     State m_state;
 };
 
 } // namespace blink
 
 #endif // AcceptConnectionObserver_h