ServiceWorker: Factor out FetchEvent related logics from RespondWithObserver.

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

+// Copyright 2017 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 FetchRespondWithObserver_h
+#define FetchRespondWithObserver_h
+
+#include "modules/ModulesExport.h"
+#include "modules/serviceworkers/RespondWithObserver.h"
+#include "platform/weborigin/KURL.h"
+#include "public/platform/WebURLRequest.h"
+#include "public/platform/modules/serviceworker/WebServiceWorkerResponseError.h"
+
+namespace blink {
+
+class ExecutionContext;
+class ScriptValue;
+class WaitUntilObserver;
+
+// This class observes the service worker's handling of a FetchEvent and
+// notifies the client.
+class MODULES_EXPORT FetchRespondWithObserver : public RespondWithObserver {
+ public:
+  ~FetchRespondWithObserver() override = default;
+
+  static FetchRespondWithObserver* create(ExecutionContext*,
+                                          int fetchEventID,
+                                          const KURL& requestURL,
+                                          WebURLRequest::FetchRequestMode,
+                                          WebURLRequest::FetchRedirectMode,
+                                          WebURLRequest::FrameType,
+                                          WebURLRequest::RequestContext,
+                                          WaitUntilObserver*);
+
+  void onResponseRejected(WebServiceWorkerResponseError) override;
+  void onResponseFulfilled(const ScriptValue&) override;
+  void onNoResponse() override;
+
+  DECLARE_VIRTUAL_TRACE();
+
+ protected:
+  FetchRespondWithObserver(ExecutionContext*,
+                           int fetchEventID,
+                           const KURL& requestURL,
+                           WebURLRequest::FetchRequestMode,
+                           WebURLRequest::FetchRedirectMode,
+                           WebURLRequest::FrameType,
+                           WebURLRequest::RequestContext,
+                           WaitUntilObserver*);
+
+ private:
+  const KURL m_requestURL;
+  const WebURLRequest::FetchRequestMode m_requestMode;
+  const WebURLRequest::FetchRedirectMode m_redirectMode;
+  const WebURLRequest::FrameType m_frameType;
+  const WebURLRequest::RequestContext m_requestContext;
+};
+
+}  // namespace blink
+
+#endif  // FetchRespondWithObserver_h