Remove TransferFileFromRemoteToLocal, which are no longer used.

chrome/browser/chromeos/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_FILE_SYSTEM_H_
 #define CHROME_BROWSER_CHROMEOS_DRIVE_FILE_SYSTEM_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 65 matching lines @@
   virtual void AddObserver(FileSystemObserver* observer) OVERRIDE;
   virtual void RemoveObserver(FileSystemObserver* observer) OVERRIDE;
   virtual void CheckForUpdates() OVERRIDE;
   virtual void Search(const std::string& search_query,
                       const GURL& next_url,
                       const SearchCallback& callback) OVERRIDE;
   virtual void SearchMetadata(const std::string& query,
                               int options,
                               int at_most_num_matches,
                               const SearchMetadataCallback& callback) OVERRIDE;
-  virtual void TransferFileFromRemoteToLocal(
-      const base::FilePath& remote_src_file_path,
-      const base::FilePath& local_dest_file_path,
-      const FileOperationCallback& callback) OVERRIDE;
   virtual void TransferFileFromLocalToRemote(
       const base::FilePath& local_src_file_path,
       const base::FilePath& remote_dest_file_path,
       const FileOperationCallback& callback) OVERRIDE;
   virtual void OpenFile(const base::FilePath& file_path,
                         OpenMode open_mode,
                         const OpenFileCallback& callback) OVERRIDE;
   virtual void Copy(const base::FilePath& src_file_path,
                     const base::FilePath& dest_file_path,
                     const FileOperationCallback& callback) OVERRIDE;
@@ skipping 228 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<FileSystem> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(FileSystem);
 };
 
 }  // namespace drive
 
 #endif  // CHROME_BROWSER_CHROMEOS_DRIVE_FILE_SYSTEM_H_