[ServiceWorker] Set FetchEvent's request's headers' guard to immutable

Source/web/ServiceWorkerGlobalScopeProxy.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 27 matching lines @@
 #include "core/dom/MessagePort.h"
 #include "core/events/MessageEvent.h"
 #include "core/inspector/ConsoleMessage.h"
 #include "core/workers/WorkerGlobalScope.h"
 #include "modules/geofencing/CircularGeofencingRegion.h"
 #include "modules/geofencing/GeofencingEvent.h"
 #include "modules/notifications/NotificationEvent.h"
 #include "modules/push_messaging/PushEvent.h"
 #include "modules/serviceworkers/ExtendableEvent.h"
 #include "modules/serviceworkers/FetchEvent.h"
+#include "modules/serviceworkers/Headers.h"
 #include "modules/serviceworkers/InstallEvent.h"
 #include "modules/serviceworkers/ServiceWorkerGlobalScope.h"
 #include "modules/serviceworkers/WaitUntilObserver.h"
 #include "platform/RuntimeEnabledFeatures.h"
 #include "public/platform/WebNotificationData.h"
 #include "public/platform/WebServiceWorkerEventResult.h"
 #include "public/platform/WebServiceWorkerRequest.h"
 #include "public/web/WebSerializedScriptValue.h"
 #include "public/web/WebServiceWorkerContextClient.h"
 #include "web/WebEmbeddedWorkerImpl.h"
@@ skipping 22 matching lines @@
 void ServiceWorkerGlobalScopeProxy::dispatchFetchEvent(int eventID, const WebServiceWorkerRequest& webRequest)
 {
     ASSERT(m_workerGlobalScope);
     RespondWithObserver* observer = RespondWithObserver::create(m_workerGlobalScope, eventID, webRequest.mode(), webRequest.frameType());
     if (!RuntimeEnabledFeatures::serviceWorkerOnFetchEnabled()) {
         observer->didDispatchEvent();
         return;
     }
 
     Request* request = Request::create(m_workerGlobalScope, webRequest);
+    request->headers()->setGuard(Headers::ImmutableGuard);
     RefPtrWillBeRawPtr<FetchEvent> fetchEvent(FetchEvent::create(observer, request));
     fetchEvent->setIsReload(webRequest.isReload());
     m_workerGlobalScope->dispatchEvent(fetchEvent.release());
     observer->didDispatchEvent();
 }
 
 void ServiceWorkerGlobalScopeProxy::dispatchGeofencingEvent(int eventID, WebGeofencingEventType eventType, const WebString& regionID, const WebCircularGeofencingRegion& region)
 {
     ASSERT(m_workerGlobalScope);
     const AtomicString& type = eventType == WebGeofencingEventTypeEnter ? EventTypeNames::geofenceenter : EventTypeNames::geofenceleave;
@@ skipping 98 matching lines @@
 
 ServiceWorkerGlobalScopeProxy::ServiceWorkerGlobalScopeProxy(WebEmbeddedWorkerImpl& embeddedWorker, Document& document, WebServiceWorkerContextClient& client)
     : m_embeddedWorker(embeddedWorker)
     , m_document(document)
     , m_client(client)
     , m_workerGlobalScope(0)
 {
 }
 
 } // namespace blink