drive: Remove polling code from DriveFileSystem

chrome/browser/chromeos/drive/drive_file_system.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_CHROMEOS_DRIVE_DRIVE_FILE_SYSTEM_H_
 #define CHROME_BROWSER_CHROMEOS_DRIVE_DRIVE_FILE_SYSTEM_H_
 
 #include <string>
 #include <vector>
 
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/observer_list.h"
-#include "base/timer.h"
 #include "chrome/browser/chromeos/drive/change_list_loader.h"
 #include "chrome/browser/chromeos/drive/change_list_loader_observer.h"
 #include "chrome/browser/chromeos/drive/drive_file_system_interface.h"
 #include "chrome/browser/chromeos/drive/drive_file_system_util.h"
 #include "chrome/browser/chromeos/drive/file_system/drive_operations.h"
 #include "chrome/browser/chromeos/drive/file_system/operation_observer.h"
 #include "chrome/browser/google_apis/gdata_errorcode.h"
 
 class PrefChangeRegistrar;
 class Profile;
@@ skipping 136 matching lines @@
   // Defines set of parameters passed to an intermediate callback
   // OnGetFileCompleteForOpen, during execution of OpenFile() method.
   struct GetFileCompleteForOpenParams;
 
   // Defines set of parameters for GetResolvedFileByPath().
   struct GetResolvedFileParams;
 
   // Struct used for AddUploadedFile.
   struct AddUploadedFileParams;
 
-  // Starts and stops periodic polling.
-  // TODO(satorux): Remove them. crbug.com/231202
-  void StartPolling();
-  void StopPolling();
-
   // Used to implement Reload().
   void ReloadAfterReset();
 
   // Sets up ChangeListLoader.
   void SetupChangeListLoader();
 
   // Called on preference change.
   void OnDisableDriveHostedFilesChanged();
 
   // Callback passed to ChangeListLoader from |Search| method.
@@ skipping 262 matching lines @@
   DriveCache* cache_;
 
   // The document service owned by DriveSystemService.
   google_apis::DriveServiceInterface* drive_service_;
 
   // The webapps registry owned by DriveSystemService.
   DriveWebAppsRegistry* webapps_registry_;
 
   DriveResourceMetadata* resource_metadata_;
 
-  // Periodic timer for checking updates.
-  base::Timer update_timer_;
-
   // Time of the last update check.
   base::Time last_update_check_time_;
 
   // Error of the last update check.
   DriveFileError last_update_check_error_;
 
   // True if hosted documents should be hidden.
   bool hide_hosted_docs_;
 
   // The set of paths opened by OpenFile but not yet closed by CloseFile.
@@ skipping 21 matching lines @@
   // Note: This should remain the last member so it'll be destroyed and
   // invalidate the weak pointers before any other members are destroyed.
   base::WeakPtrFactory<DriveFileSystem> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(DriveFileSystem);
 };
 
 }  // namespace drive
 
 #endif  // CHROME_BROWSER_CHROMEOS_DRIVE_DRIVE_FILE_SYSTEM_H_