Cleanup ash shelf accessor functions.

ash/shelf/shelf_layout_manager.h

 // Copyright 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_SHELF_SHELF_LAYOUT_MANAGER_H_
 #define ASH_SHELF_SHELF_LAYOUT_MANAGER_H_
 
 #include <vector>
 
 #include "ash/ash_export.h"
@@ skipping 201 matching lines @@
     return IsHorizontalAlignment() ? horizontal : vertical;
   }
 
   // Is the shelf's alignment horizontal?
   bool IsHorizontalAlignment() const;
 
   // Set the height of the ChromeVox panel, which takes away space from the
   // available work area from the top of the screen.
   void SetChromeVoxPanelHeight(int height);
 
-  // Returns a ShelfLayoutManager on the display which has a shelf for
-  // given |window|. See RootWindowController::ForShelf for more info.
-  static ShelfLayoutManager* ForShelf(aura::Window* window);
-
  private:
   class AutoHideEventFilter;
   class UpdateShelfObserver;
   friend class AshPopupAlignmentDelegateTest;
   friend class ash::ScreenAsh;
   friend class PanelLayoutManagerTest;
   friend class ShelfLayoutManagerTest;
   FRIEND_TEST_ALL_PREFIXES(ash::AshPopupAlignmentDelegateTest, AutoHide);
   FRIEND_TEST_ALL_PREFIXES(ash::WebNotificationTrayTest, PopupAndFullscreen);
 
@@ skipping 179 matching lines @@
 
   // The show hide animation duration override or 0 for default.
   int duration_override_in_ms_;
 
   DISALLOW_COPY_AND_ASSIGN(ShelfLayoutManager);
 };
 
 }  // namespace ash
 
 #endif  // ASH_SHELF_SHELF_LAYOUT_MANAGER_H_