Have ScriptPromiseResolver on the Oilpan heap always.

Source/modules/webmidi/MIDIAccessInitializer.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 MIDIAccessInitializer_h
 #define MIDIAccessInitializer_h
 
 #include "bindings/core/v8/ScriptPromise.h"
 #include "bindings/core/v8/ScriptPromiseResolver.h"
 #include "modules/ModulesExport.h"
@@ skipping 22 matching lines @@
             : id(id)
             , manufacturer(manufacturer)
             , name(name)
             , type(type)
             , version(version)
             , state(state) { }
     };
 
     static ScriptPromise start(ScriptState* scriptState, const MIDIOptions& options)
     {
-        RefPtrWillBeRawPtr<MIDIAccessInitializer> resolver = adoptRefWillBeNoop(new MIDIAccessInitializer(scriptState, options));
+        MIDIAccessInitializer* resolver = new MIDIAccessInitializer(scriptState, options);
         resolver->keepAliveWhilePending();
         resolver->suspendIfNeeded();
         return resolver->start();
     }
 
     ~MIDIAccessInitializer() override;
 
     // Eager finalization to allow dispose() operation access
     // other (non eager) heap objects.
     EAGERLY_FINALIZE();
@@ skipping 21 matching lines @@
     OwnPtr<MIDIAccessor> m_accessor;
     Vector<PortDescriptor> m_portDescriptors;
     bool m_requestSysex;
     bool m_hasBeenDisposed;
     bool m_sysexPermissionResolved;
 };
 
 } // namespace blink
 
 #endif // MIDIAccessInitializer_h