chromeos: Rename ash::WmShelf to Shelf

ash/system/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_SYSTEM_IME_MENU_IME_MENU_TRAY_H_
 #define ASH_SYSTEM_IME_MENU_IME_MENU_TRAY_H_
 
 #include "ash/ash_export.h"
 #include "ash/system/ime/ime_observer.h"
 #include "ash/system/tray/ime_info.h"
@@ skipping 14 matching lines @@
 // A button in the tray which displays the short name of the currently-activated
 // IME (e.g., 'GB', 'US'). Clicking this button opens the opt-in IME menu,
 // a standalone bubble displaying a list of available IMEs along with buttons
 // for emoji, handwriting, and voice.
 class ASH_EXPORT ImeMenuTray : public TrayBackgroundView,
                                public IMEObserver,
                                public views::TrayBubbleView::Delegate,
                                public keyboard::KeyboardControllerObserver,
                                public VirtualKeyboardObserver {
  public:
-  explicit ImeMenuTray(WmShelf* wm_shelf);
+  explicit ImeMenuTray(Shelf* shelf);
   ~ImeMenuTray() override;
 
   // Shows the IME menu bubble and highlights the button.
   void ShowImeMenuBubble();
 
   // Hides the IME menu bubble and lowlights the button.
   void HideImeMenuBubble();
 
   // Returns true if the IME menu bubble has been shown.
   bool IsImeMenuBubbleShown();
@@ skipping 65 matching lines @@
   bool show_bubble_after_keyboard_hidden_;
 
   base::WeakPtrFactory<ImeMenuTray> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ImeMenuTray);
 };
 
 }  // namespace ash
 
 #endif  // ASH_SYSTEM_IME_MENU_IME_MENU_TRAY_H_