Have ScriptPromiseResolver on the Oilpan heap always.

Source/modules/screen_orientation/ScreenOrientation.cpp

 // 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.
 
 #include "config.h"
 #include "modules/screen_orientation/ScreenOrientation.h"
 
 #include "bindings/core/v8/ScriptPromise.h"
 #include "bindings/core/v8/ScriptPromiseResolver.h"
 #include "core/dom/DOMException.h"
@@ skipping 134 matching lines @@
     m_type = type;
 }
 
 void ScreenOrientation::setAngle(unsigned short angle)
 {
     m_angle = angle;
 }
 
 ScriptPromise ScreenOrientation::lock(ScriptState* state, const AtomicString& lockString)
 {
-    RefPtrWillBeRawPtr<ScriptPromiseResolver> resolver = ScriptPromiseResolver::create(state);
+    ScriptPromiseResolver* resolver = ScriptPromiseResolver::create(state);
     ScriptPromise promise = resolver->promise();
 
     Document* document = m_frame ? m_frame->document() : 0;
 
     if (!document || !controller()) {
         DOMException* exception = DOMException::create(InvalidStateError, "The object is no longer associated to a document.");
         resolver->reject(exception);
         return promise;
     }
 
@@ skipping 23 matching lines @@
     return ScreenOrientationController::from(*m_frame);
 }
 
 DEFINE_TRACE(ScreenOrientation)
 {
     RefCountedGarbageCollectedEventTargetWithInlineData<ScreenOrientation>::trace(visitor);
     DOMWindowProperty::trace(visitor);
 }
 
 } // namespace blink