Start implementing ForeignFetchEvent for foreign fetch events.

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

+// Copyright 2016 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 ForeignFetchEvent_h
+#define ForeignFetchEvent_h
+
+#include "bindings/core/v8/ScriptPromise.h"
+#include "modules/EventModules.h"
+#include "modules/ModulesExport.h"
+#include "modules/fetch/Request.h"
+#include "modules/serviceworkers/ExtendableEvent.h"
+#include "modules/serviceworkers/ForeignFetchEventInit.h"
+#include "modules/serviceworkers/ForeignFetchRespondWithObserver.h"
+#include "platform/heap/Handle.h"
+
+namespace blink {
+
+class ExceptionState;
+class Request;
+
+// A foreignfetch event is dispatched by the client to a service worker's script
+// context. ForeignFetchRespondWithObserver can be used to notify the client
+// about the service worker's response.
+class MODULES_EXPORT ForeignFetchEvent final : public ExtendableEvent {
+    DEFINE_WRAPPERTYPEINFO();
+public:
+    static ForeignFetchEvent* create();
+    static ForeignFetchEvent* create(const AtomicString& type, const ForeignFetchEventInit&);
+    static ForeignFetchEvent* create(const AtomicString& type, const ForeignFetchEventInit&, ForeignFetchRespondWithObserver*);
+
+    Request* request() const;
+
+    void respondWith(ScriptState*, ScriptPromise, ExceptionState&);
+
+    const AtomicString& interfaceName() const override;
+
+    DECLARE_VIRTUAL_TRACE();
+
+protected:
+    ForeignFetchEvent();
+    ForeignFetchEvent(const AtomicString& type, const ForeignFetchEventInit&, ForeignFetchRespondWithObserver*);
+
+private:
+    Member<ForeignFetchRespondWithObserver> m_observer;
+    Member<Request> m_request;
+};
+
+} // namespace blink
+
+#endif // ForeignFetchEvent_h