Have ScriptPromiseResolver on the Oilpan heap always.

Source/modules/push_messaging/PushPermissionStatusCallbacks.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/push_messaging/PushPermissionStatusCallbacks.h"
 
 #include "bindings/core/v8/ScriptPromiseResolver.h"
 #include "modules/push_messaging/PushError.h"
 #include "wtf/text/WTFString.h"
 
 namespace blink {
 
-PushPermissionStatusCallbacks::PushPermissionStatusCallbacks(PassRefPtrWillBeRawPtr<ScriptPromiseResolver> resolver)
+PushPermissionStatusCallbacks::PushPermissionStatusCallbacks(ScriptPromiseResolver* resolver)
     : m_resolver(resolver)
 {
 }
 
 PushPermissionStatusCallbacks::~PushPermissionStatusCallbacks()
 {
 }
 
 void PushPermissionStatusCallbacks::onSuccess(WebPushPermissionStatus* status)
 {
@@ skipping 18 matching lines @@
         return "denied";
     case WebPushPermissionStatusPrompt:
         return "prompt";
     }
 
     ASSERT_NOT_REACHED();
     return "denied";
 }
 
 } // namespace blink