[Chrome OS MD] Draw a 1px separator between 2 tray items

ash/common/system/chromeos/ime_menu/ime_menu_tray.h

 // Copyright 2016 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_CHROMEOS_IME_MENU_IME_MENU_TRAY_H_
 #define ASH_COMMON_SYSTEM_CHROMEOS_IME_MENU_IME_MENU_TRAY_H_
 
 #include "ash/ash_export.h"
 #include "ash/common/system/ime/ime_observer.h"
 #include "ash/common/system/tray/system_tray_delegate.h"
 #include "ash/common/system/tray/tray_background_view.h"
 #include "base/macros.h"
 
 namespace views {
 class Label;
 }  // namespace views
 
 namespace ash {
 class StatusAreaWidget;
+class ViewObserver;
 class WmWindow;
 
 // The tray item for IME menu.
 class ASH_EXPORT ImeMenuTray : public TrayBackgroundView, public IMEObserver {
  public:
-  explicit ImeMenuTray(WmShelf* wm_shelf);
+  explicit ImeMenuTray(WmShelf* wm_shelf, ViewObserver* view_observer);
   ~ImeMenuTray() override;
 
   // TrayBackgroundView:
   void SetShelfAlignment(ShelfAlignment alignment) override;
   base::string16 GetAccessibleNameForTray() override;
   void HideBubbleWithView(const views::TrayBubbleView* bubble_view) override;
   void ClickedOutsideBubble() override;
   bool PerformAction(const ui::Event& event) override;
 
   // IMEObserver:
@@ skipping 13 matching lines @@
 
   views::Label* label_;
   IMEInfo current_ime_;
 
   DISALLOW_COPY_AND_ASSIGN(ImeMenuTray);
 };
 
 }  // namespace ash
 
 #endif  // ASH_COMMON_SYSTEM_CHROMEOS_IME_MENU_IME_MENU_TRAY_H_