Remove TransferFileFromRemoteToLocal, which are no longer used.

chrome/browser/chromeos/drive/file_system.cc

Index: chrome/browser/chromeos/drive/file_system.cc
diff --git a/chrome/browser/chromeos/drive/file_system.cc b/chrome/browser/chromeos/drive/file_system.cc
index 1078ffe43060c005af5bcc64b56e87869255d919..79f9d504ca269d611ddc445dfee680e7a60f072c 100644
--- a/chrome/browser/chromeos/drive/file_system.cc
+++ b/chrome/browser/chromeos/drive/file_system.cc
@@ -286,17 +286,6 @@ void FileSystem::RemoveObserver(FileSystemObserver* observer) {
   observers_.RemoveObserver(observer);
 }
 
-void FileSystem::TransferFileFromRemoteToLocal(
-    const base::FilePath& remote_src_file_path,
-    const base::FilePath& local_dest_file_path,
-    const FileOperationCallback& callback) {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
-  DCHECK(!callback.is_null());
-  copy_operation_->TransferFileFromRemoteToLocal(remote_src_file_path,
-                                                 local_dest_file_path,
-                                                 callback);
-}
-
 void FileSystem::TransferFileFromLocalToRemote(
     const base::FilePath& local_src_file_path,
     const base::FilePath& remote_dest_file_path,