Stop fallback for empty local path in ui::SelectedFileInfo's constructor.

ui/shell_dialogs/selected_file_info.h

 // Copyright (c) 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 UI_SHELL_DIALOGS_SELECTED_FILE_INFO_H_
 #define UI_SHELL_DIALOGS_SELECTED_FILE_INFO_H_
 
 #include <vector>
 
 #include "base/files/file_path.h"
 #include "base/strings/string16.h"
 #include "ui/shell_dialogs/shell_dialogs_export.h"
 
 namespace ui {
 
 // Struct used for passing selected file info to WebKit.
 struct SHELL_DIALOGS_EXPORT SelectedFileInfo {
   // Selected file's user friendly path as seen in the UI.
   base::FilePath file_path;
 
   // The actual local path to the selected file. This can be a snapshot file
   // with a human unreadable name like /blah/.d41d8cd98f00b204e9800998ecf8427e.
-  // |real_path| can differ from |file_path| for drive files (e.g.
+  // |local_path| can differ from |file_path| for drive files (e.g.
   // /drive_cache/temporary/d41d8cd98f00b204e9800998ecf8427e vs.
   // /special/drive/foo.txt).
-  // If not set, defaults to |file_path|.
   base::FilePath local_path;
 
   // This field is optional. The display name contains only the base name
   // portion of a file name (ex. no path separators), and used for displaying
   // selected file names. If this field is empty, the base name portion of
   // |path| is used for displaying.
   base::FilePath::StringType display_name;
 
   SelectedFileInfo();
   SelectedFileInfo(const base::FilePath& in_file_path,
                    const base::FilePath& in_local_path);
   ~SelectedFileInfo();
 };
 
 }  // namespace ui
 
 #endif  // UI_SHELL_DIALOGS_SELECTED_FILE_INFO_H_
-