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chrome/browser/supervised_user/experimental/supervised_user_blacklist_downloader.h

-// Copyright 2014 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_SUPERVISED_USER_EXPERIMENTAL_SUPERVISED_USER_BLACKLIST_DOWNLOADER_H_
-#define CHROME_BROWSER_SUPERVISED_USER_EXPERIMENTAL_SUPERVISED_USER_BLACKLIST_DOWNLOADER_H_
-
-#include "base/callback.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/memory/weak_ptr.h"
-#include "net/url_request/url_fetcher_delegate.h"
-
-namespace base {
-class FilePath;
-}  // namespace base
-
-namespace net {
-class URLFetcher;
-class URLRequestContextGetter;
-}  // namespace net
-
-class GURL;
-
-// Helper class to download a blacklist file from a given URL and store it in a
-// local file. If the local file already exists, reports success without
-// downloading anything.
-class SupervisedUserBlacklistDownloader : public net::URLFetcherDelegate {
- public:
-  typedef base::Callback<void(bool /* success */)> DownloadFinishedCallback;
-
-  // Directly starts the download (if necessary) and runs |callback| when done.
-  // If the instance is destroyed before it is finished, |callback| is not run.
-  SupervisedUserBlacklistDownloader(
-      const GURL& url,
-      const base::FilePath& path,
-      net::URLRequestContextGetter* request_context,
-      const DownloadFinishedCallback& callback);
-  ~SupervisedUserBlacklistDownloader() override;
-
- private:
-  // net::URLFetcherDelegate implementation.
-  void OnURLFetchComplete(const net::URLFetcher* source) override;
-
-  void OnFileExistsCheckDone(bool exists);
-
-  DownloadFinishedCallback callback_;
-
-  scoped_ptr<net::URLFetcher> fetcher_;
-
-  base::WeakPtrFactory<SupervisedUserBlacklistDownloader> weak_ptr_factory_;
-
-  DISALLOW_COPY_AND_ASSIGN(SupervisedUserBlacklistDownloader);
-};
-
-#endif  // CHROME_BROWSER_SUPERVISED_USER_EXPERIMENTAL_SUPERVISED_USER_BLACKLIST_DOWNLOADER_H_