Remove pre-MD code related to tray/menu user profiles.

ash/common/system/tray/tray_utils.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 ASH_COMMON_SYSTEM_TRAY_TRAY_UTILS_H_
 #define ASH_COMMON_SYSTEM_TRAY_TRAY_UTILS_H_
 
 #include <vector>
 
 #include "ash/public/cpp/shelf_types.h"
@@ skipping 12 matching lines @@
 void SetupLabelForTray(views::Label* label);
 
 // TODO(jennyz): refactor these two functions to SystemTrayItem.
 // Sets the empty border of an image tray item for adjusting the space
 // around it.
 void SetTrayImageItemBorder(views::View* tray_view, ShelfAlignment alignment);
 // Sets the empty border around a label tray item for adjusting the space
 // around it.
 void SetTrayLabelItemBorder(TrayItemView* tray_view, ShelfAlignment alignment);
 
-// Computes an accessible label for this button based on all descendant view
-// labels by concatenating them in depth-first order.
-void GetAccessibleLabelFromDescendantViews(
-    views::View* view,
-    std::vector<base::string16>& out_labels);
-
 }  // namespace ash
 
 #endif  // ASH_COMMON_SYSTEM_TRAY_TRAY_UTILS_H_