Fix for default value of FetchEvent.cancellable

Source/modules/serviceworkers/FetchEvent.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 "FetchEvent.h"
 
 #include "modules/fetch/Request.h"
 #include "modules/serviceworkers/ServiceWorkerGlobalScope.h"
 #include "wtf/RefPtr.h"
 
 namespace blink {
 
 PassRefPtrWillBeRawPtr<FetchEvent> FetchEvent::create()
 {
     return adoptRefWillBeNoop(new FetchEvent());
 }
 
-PassRefPtrWillBeRawPtr<FetchEvent> FetchEvent::create(const AtomicString& type, FetchEventInit& initializer)
+PassRefPtrWillBeRawPtr<FetchEvent> FetchEvent::create(const AtomicString& type, const FetchEventInit& initializer)
 {
-    initializer.setCancelable(true);
     return adoptRefWillBeNoop(new FetchEvent(type, initializer, nullptr));
 }
 
-PassRefPtrWillBeRawPtr<FetchEvent> FetchEvent::create(const AtomicString& type, FetchEventInit& initializer, RespondWithObserver* observer)
+PassRefPtrWillBeRawPtr<FetchEvent> FetchEvent::create(const AtomicString& type, const FetchEventInit& initializer, RespondWithObserver* observer)
 {
-    initializer.setCancelable(true);
     return adoptRefWillBeNoop(new FetchEvent(type, initializer, observer));
 }
 
 Request* FetchEvent::request() const
 {
     return m_request;
 }
 
 bool FetchEvent::isReload() const
 {
@@ skipping 26 matching lines @@
 }
 
 DEFINE_TRACE(FetchEvent)
 {
     visitor->trace(m_observer);
     visitor->trace(m_request);
     ExtendableEvent::trace(visitor);
 }
 
 } // namespace blink