[ServiceWorker, PushMessaging] Use ScriptPromiseResolverWithContext.

Source/bindings/v8/ScriptPromiseResolverWithContext.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 "bindings/v8/ScriptPromiseResolverWithContext.h"
 
 namespace WebCore {
 
 ScriptPromiseResolverWithContext::ScriptPromiseResolverWithContext(NewScriptState* scriptState)
@@ skipping 33 matching lines @@
         m_resolver->reject(m_value.newLocal(m_scriptState->isolate()));
     }
     m_state = ResolvedOrRejected;
     clear();
 }
 
 void ScriptPromiseResolverWithContext::clear()
 {
     m_resolver.clear();
     m_value.clear();
-    m_scriptState.clear();
 }
 
 } // namespace WebCore