Have ScriptPromiseResolver on the Oilpan heap always.

Source/modules/screen_orientation/LockOrientationCallback.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 LockOrientationCallback_h
 #define LockOrientationCallback_h
 
 #include "platform/heap/Handle.h"
 #include "public/platform/modules/screen_orientation/WebLockOrientationCallback.h"
 #include "public/platform/modules/screen_orientation/WebScreenOrientationType.h"
 #include "wtf/Noncopyable.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/RefPtr.h"
 
 namespace blink {
 
 class ScriptPromiseResolver;
 
 // LockOrientationCallback is an implementation of WebLockOrientationCallback
 // that will resolve the underlying promise depending on the result passed to
 // the callback.
 class LockOrientationCallback final : public WebLockOrientationCallback {
     WTF_MAKE_NONCOPYABLE(LockOrientationCallback);
 public:
-    explicit LockOrientationCallback(PassRefPtrWillBeRawPtr<ScriptPromiseResolver>);
+    explicit LockOrientationCallback(ScriptPromiseResolver*);
     ~LockOrientationCallback() override;
 
     void onSuccess() override;
     void onError(WebLockOrientationError) override;
 
 private:
-    RefPtrWillBePersistent<ScriptPromiseResolver> m_resolver;
+    Persistent<ScriptPromiseResolver> m_resolver;
 };
 
 } // namespace blink
 
 #endif // LockOrientationCallback_h