Remove RefPtr<ScriptState> from FetchEvent

third_party/WebKit/Source/modules/serviceworkers/FetchEvent.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 FetchEvent_h
 #define FetchEvent_h
 
 #include "bindings/core/v8/ScriptPromise.h"
 #include "bindings/core/v8/ScriptPromiseProperty.h"
 #include "modules/EventModules.h"
@@ skipping 36 matching lines @@
                             WaitUntilObserver*,
                             bool navigationPreloadSent);
 
   Request* request() const;
   String clientId() const;
   bool isReload() const;
 
   void respondWith(ScriptState*, ScriptPromise, ExceptionState&);
   ScriptPromise preloadResponse(ScriptState*);
 
-  void onNavigationPreloadResponse(std::unique_ptr<WebServiceWorkerResponse>,
+  void onNavigationPreloadResponse(ScriptState*,
+                                   std::unique_ptr<WebServiceWorkerResponse>,
                                    std::unique_ptr<WebDataConsumerHandle>);
-  void onNavigationPreloadError(std::unique_ptr<WebServiceWorkerError>);
+  void onNavigationPreloadError(ScriptState*,
+                                std::unique_ptr<WebServiceWorkerError>);
 
   const AtomicString& interfaceName() const override;
 
   DECLARE_VIRTUAL_TRACE();
 
  protected:
   FetchEvent(ScriptState*,
              const AtomicString& type,
              const FetchEventInit&,
              RespondWithObserver*,
              WaitUntilObserver*,
              bool navigationPreloadSent);
 
  private:
   RefPtr<ScriptState> m_scriptState;

[Yuki, 2016/12/02 06:42:08]

Can you remove this line?

   Member<RespondWithObserver> m_observer;
   Member<Request> m_request;
   Member<PreloadResponseProperty> m_preloadResponseProperty;
   String m_clientId;
   bool m_isReload;
 };
 
 }  // namespace blink
 
 #endif  // FetchEvent_h