service worker: Add NavigationPreload runtime flag and skeleton interface

third_party/WebKit/Source/modules/serviceworkers/ServiceWorker.h

 /*
  * 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 25 matching lines @@
 #include "bindings/core/v8/SerializedScriptValue.h"
 #include "core/workers/AbstractWorker.h"
 #include "modules/ModulesExport.h"
 #include "public/platform/modules/serviceworker/WebServiceWorker.h"
 #include "public/platform/modules/serviceworker/WebServiceWorkerProxy.h"
 #include "wtf/PassRefPtr.h"
 #include <memory>
 
 namespace blink {
 
+class NavigationPreloadOptions;
 class ScriptPromiseResolver;
 
 class MODULES_EXPORT ServiceWorker final : public AbstractWorker,
                                            public ActiveScriptWrappable,
                                            public WebServiceWorkerProxy {
   DEFINE_WRAPPERTYPEINFO();
   USING_GARBAGE_COLLECTED_MIXIN(ServiceWorker);
 
  public:
   static ServiceWorker* from(ExecutionContext*,
                              std::unique_ptr<WebServiceWorker::Handle>);
 
   ~ServiceWorker() override;
   DECLARE_VIRTUAL_TRACE();
 
   // Eager finalization needed to promptly release owned WebServiceWorker.
   EAGERLY_FINALIZE();
 
   void postMessage(ExecutionContext*,
                    PassRefPtr<SerializedScriptValue> message,
                    const MessagePortArray&,
                    ExceptionState&);
 
   String scriptURL() const;
   String state() const;
   DEFINE_ATTRIBUTE_EVENT_LISTENER(statechange);
 
+  ScriptPromise getNavigationPreload(ScriptState*);
+  ScriptPromise setNavigationPreload(ScriptState*,
+                                     const NavigationPreloadOptions&);
+
   // ScriptWrappable overrides.
   bool hasPendingActivity() const final;
 
   // WebServiceWorkerProxy overrides.
   void dispatchStateChangeEvent() override;
 
   // AbstractWorker overrides.
   const AtomicString& interfaceName() const override;
 
   void internalsTerminate();
 
  private:
   static ServiceWorker* getOrCreate(ExecutionContext*,
                                     std::unique_ptr<WebServiceWorker::Handle>);
   ServiceWorker(ExecutionContext*, std::unique_ptr<WebServiceWorker::Handle>);
 
   // ActiveDOMObject overrides.
   void stop() override;
 
   // A handle to the service worker representation in the embedder.
   std::unique_ptr<WebServiceWorker::Handle> m_handle;
   bool m_wasStopped;
 };
 
 }  // namespace blink
 
 #endif  // ServiceWorker_h