Automatically retry the following URLFetchers when the network changes:

chrome/browser/policy/app_pack_updater.h

 // Copyright (c) 2012 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_POLICY_APP_PACK_UPDATER_H_
 #define CHROME_BROWSER_POLICY_APP_PACK_UPDATER_H_
 
 #include <map>
 #include <set>
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/callback.h"
 #include "base/compiler_specific.h"
 #include "base/file_path.h"
 #include "base/memory/weak_ptr.h"
 #include "base/threading/sequenced_worker_pool.h"
 #include "chrome/browser/extensions/updater/extension_downloader_delegate.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
-#include "net/base/network_change_notifier.h"
 
 class GURL;
 
 namespace extensions {
 class CrxInstaller;
 class ExtensionDownloader;
 class ExternalLoader;
 }
 
 namespace net {
 class URLRequestContextGetter;
 }
 
 namespace tracked_objects {
 class Location;
 }
 
 namespace policy {
 
 class AppPackExternalLoader;
 class EnterpriseInstallAttributes;
 
 // The AppPackUpdater manages a set of extensions that are configured via a
 // device policy to be locally cached and installed into the Demo user account
 // at login time.
 class AppPackUpdater : public content::NotificationObserver,
-                       public net::NetworkChangeNotifier::IPAddressObserver,
                        public extensions::ExtensionDownloaderDelegate {
  public:
   // Callback to listen for updates to the screensaver extension's path.
   typedef base::Callback<void(const FilePath&)> ScreenSaverUpdateCallback;
 
   // Keys for the entries in the AppPack dictionary policy.
   static const char kExtensionId[];
   static const char kUpdateUrl[];
 
   // The |request_context| is used for the update checks.
@@ skipping 11 matching lines @@
   // exists. Subsequent calls will override the previous |callback|. A null
   // |callback| can be used to remove a previous callback.
   void SetScreenSaverUpdateCallback(const ScreenSaverUpdateCallback& callback);
 
   // If a user of one of the AppPack's extensions detects that the extension
   // is damaged then this method can be used to remove it from the cache and
   // retry to download it after a restart.
   void OnDamagedFileDetected(const FilePath& path);
 
  private:
-  struct AppPackEntry {
-    std::string update_url;
-    bool update_checked;
-  };
-
   struct CacheEntry {
     std::string path;
     std::string cached_version;
   };
 
-  // Maps an extension ID to its update URL and update information.
-  typedef std::map<std::string, AppPackEntry> PolicyEntryMap;
+  // Maps an extension ID to its update URL.
+  typedef std::map<std::string, std::string> PolicyEntryMap;
 
   // Maps an extension ID to a CacheEntry.
   typedef std::map<std::string, CacheEntry> CacheEntryMap;
 
   void Init();
 
   // content::NotificationObserver:
   virtual void Observe(int type,
                        const content::NotificationSource& source,
                        const content::NotificationDetails& details) OVERRIDE;
 
-  // net::NetworkChangeNotifier::IPAddressObserver:
-  virtual void OnIPAddressChanged() OVERRIDE;
-
   // Loads the current policy and schedules a cache update.
   void LoadPolicy();
 
   // Starts a cache update check immediately.
   void CheckCacheNow();
 
   // Performs a cache update check on the blocking pool. |app_pack_updater| is
   // used to reply in the UI thread. |valid_ids| contains the list of IDs that
   // are currently configured by policy; anything else is invalid, and should
   // be removed from the cache. |valid_ids| is owned by the posted task.
@@ skipping 63 matching lines @@
   void OnCrxInstallFailed(extensions::CrxInstaller* installer);
 
   // Helper to post blocking IO tasks to the blocking pool.
   void PostBlockingTask(const tracked_objects::Location& from_here,
                         const base::Closure& task);
 
   // Sets |screen_saver_path_| and invokes |screen_saver_update_callback_| if
   // appropriate.
   void SetScreenSaverPath(const FilePath& path);
 
-  // Marks extension |id| in |app_pack_extensions_| as having already been
-  // checked for updates, if it exists.
-  void SetUpdateChecked(const std::string& id);
-
   base::WeakPtrFactory<AppPackUpdater> weak_ptr_factory_;
 
   // Observes failures to install CRX files.
   content::NotificationRegistrar notification_registrar_;
 
   // Unique sequence token so that tasks posted by the AppPackUpdater are
   // executed sequentially in the blocking pool.
   base::SequencedWorkerPool::SequenceToken worker_pool_token_;
 
   // Whether the updater has initialized. This is only done if the device is in
@@ skipping 30 matching lines @@
 
   // For checking the device mode.
   EnterpriseInstallAttributes* install_attributes_;
 
   DISALLOW_COPY_AND_ASSIGN(AppPackUpdater);
 };
 
 }  // namespace policy
 
 #endif  // CHROME_BROWSER_POLICY_APP_PACK_UPDATER_H_