drive: Simplify TouchOperation with ResourceEntry::local_id

chrome/browser/chromeos/drive/file_system/touch_operation.h

 // Copyright 2013 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_FILE_SYSTEM_TOUCH_OPERATION_H_
 #define CHROME_BROWSER_CHROMEOS_DRIVE_FILE_SYSTEM_TOUCH_OPERATION_H_
 
 #include "base/basictypes.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 37 matching lines @@
   void TouchFile(const base::FilePath& file_path,
                  const base::Time& last_access_time,
                  const base::Time& last_modified_time,
                  const FileOperationCallback& callback);
 
  private:
   // Part of TouchFile(). Runs after GetResourceEntry is completed.
   void TouchFileAfterGetResourceEntry(const base::Time& last_access_time,
                                       const base::Time& last_modified_time,
                                       const FileOperationCallback& callback,
-                                      std::string* local_id,
                                       ResourceEntry* entry,
                                       FileError error);
 
   // Part of TouchFile(). Runs after the server side update for last access time
   // and last modified time is completed.
   void TouchFileAfterServerTimeStampUpdated(
       const std::string& local_id,
       const FileOperationCallback& callback,
       google_apis::GDataErrorCode gdata_error,
       scoped_ptr<google_apis::ResourceEntry> resource_entry);
@@ skipping 11 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<TouchOperation> weak_ptr_factory_;
   DISALLOW_COPY_AND_ASSIGN(TouchOperation);
 };
 
 }  // namespace file_system
 }  // namespace drive
 
 #endif  // CHROME_BROWSER_CHROMEOS_DRIVE_FILE_SYSTEM_TOUCH_OPERATION_H_