Make customization documents singletons.

chrome/browser/chromeos/login/apply_services_customization.h

-// Copyright (c) 2011 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_CHROMEOS_LOGIN_APPLY_SERVICES_CUSTOMIZATION_H_
-#define CHROME_BROWSER_CHROMEOS_LOGIN_APPLY_SERVICES_CUSTOMIZATION_H_
-
-#include <string>
-
-#include "base/basictypes.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/timer.h"
-#include "chrome/common/net/url_fetcher.h"
-#include "googleurl/src/gurl.h"
-
-class FilePath;
-class PrefService;
-
-namespace chromeos {
-
-// This class fetches services customization document and apply it
-// as soon as the document is downloaded.
-class ApplyServicesCustomization : public URLFetcher::Delegate {
- public:
-  // This method checks if service customization has been applied and if not
-  // starts the process.
-  static void StartIfNeeded();
-
-  // Registers preferences.
-  static void RegisterPrefs(PrefService* local_state);
-
-  // Returns true if service customization has been applied.
-  static bool IsApplied();
-
- private:
-  explicit ApplyServicesCustomization(const std::string& url_str);
-
-  // Initiate URL fetch, return true if the object will delete itself later.
-  bool Init();
-
-  // Initiate file fetching.
-  void StartFileFetch();
-
-  // Overriden from URLFetcher::Delegate:
-  virtual void OnURLFetchComplete(const URLFetcher* source,
-                                  const GURL& url,
-                                  const net::URLRequestStatus& status,
-                                  int response_code,
-                                  const ResponseCookies& cookies,
-                                  const std::string& data);
-
-  // Applies given |manifest|.
-  void Apply(const std::string& manifest);
-
-  // Applies given |manifest| and delete this object.
-  void ApplyAndDelete(const std::string& manifest);
-
-  // Executes on FILE thread and reads file to string.
-  void ReadFileInBackground(const FilePath& file);
-
-  // Remember in local state status of kServicesCustomizationAppliedPref.
-  static void SetApplied(bool val);
-
-  // Services customization manifest URL.
-  GURL url_;
-
-  // URLFetcher instance.
-  scoped_ptr<URLFetcher> url_fetcher_;
-
-  // Timer to retry fetching file if network is not available.
-  base::OneShotTimer<ApplyServicesCustomization> retry_timer_;
-
-  // How many times we already tried to fetch customization manifest file.
-  int num_retries_;
-
-  DISALLOW_COPY_AND_ASSIGN(ApplyServicesCustomization);
-};
-
-}  // namespace chromeos
-
-#endif  // CHROME_BROWSER_CHROMEOS_LOGIN_APPLY_SERVICES_CUSTOMIZATION_H_