Handle online and offline redirects via interceptor and offline scheme

chrome/browser/android/offline_pages/offline_page_request_offline_job.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 CHROME_BROWSER_ANDROID_OFFLINE_PAGES_OFFLINE_PAGE_REQUEST_OFFLINE_JOB_H_
+#define CHROME_BROWSER_ANDROID_OFFLINE_PAGES_OFFLINE_PAGE_REQUEST_OFFLINE_JOB_H_
+
+#include "base/memory/weak_ptr.h"
+#include "net/base/net_errors.h"
+#include "net/http/http_byte_range.h"
+#include "net/url_request/url_request_file_job.h"
+#include "url/gurl.h"
+
+namespace base {
+class FilePath;
+}
+
+namespace offline_pages {
+
+// A request job that serves content from backing file for URLs with offline
+// scheme.
+class OfflinePageRequestOfflineJob : public net::URLRequestFileJob {
+ public:
+   OfflinePageRequestOfflineJob(void* profile_id,
+                                net::URLRequest* request,
+                                net::NetworkDelegate* network_delegate);
+  ~OfflinePageRequestOfflineJob() override;
+
+  // net::URLRequestJob overrides:
+  void Start() override;
+  void Kill() override;
+
+ private:
+  void StartAsync();
+  void LoadFile(const base::FilePath& offline_file_path);
+
+  void* profile_id_;
+  base::WeakPtrFactory<OfflinePageRequestOfflineJob> weak_ptr_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(OfflinePageRequestOfflineJob);
+};
+
+}  // namespace offline_pages
+
+#endif // CHROME_BROWSER_ANDROID_OFFLINE_PAGES_OFFLINE_PAGE_REQUEST_OFFLINE_JOB_H_