mash: Migrate ShelfLockingManager to ash/common.

ash/common/shelf/wm_shelf.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_SHELF_WM_SHELF_H_
 #define ASH_COMMON_SHELF_WM_SHELF_H_
 
 #include "ash/ash_export.h"
 #include "ash/common/shelf/shelf_types.h"
 
 namespace gfx {
 class Rect;
 }
 
 namespace ui {
 class GestureEvent;
 class MouseEvent;
 }
 
 namespace ash {
 
+class ShelfLockingManager;
 class WmShelfObserver;
 class WmWindow;
 
 // Used for accessing global state.
 class ASH_EXPORT WmShelf {
  public:
   // Returns the window showing the shelf.
   virtual WmWindow* GetWindow() = 0;
 
   virtual ShelfAlignment GetAlignment() const = 0;
@@ skipping 52 matching lines @@
   // TODO(jamescook): Nuke when ash_sysui is removed. http://crbug.com/621112
   virtual void UpdateAutoHideForMouseEvent(ui::MouseEvent* event) = 0;
   virtual void UpdateAutoHideForGestureEvent(ui::GestureEvent* event) = 0;
 
   virtual void AddObserver(WmShelfObserver* observer) = 0;
   virtual void RemoveObserver(WmShelfObserver* observer) = 0;
 
   // Simulates a virtual keyboard bounds update.
   virtual void SetKeyboardBoundsForTesting(const gfx::Rect& bounds) = 0;
 
+  virtual ShelfLockingManager* GetShelfLockingManagerForTesting() = 0;
+
  protected:
   virtual ~WmShelf() {}
 };
 
 }  // namespace ash
 
 #endif  // ASH_COMMON_SHELF_WM_SHELF_H_