Creates mus implementation of WmShelf

mash/wm/shelf_layout_manager.h

 // Copyright 2015 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 MASH_WM_SHELF_LAYOUT_MANAGER_H_
 #define MASH_WM_SHELF_LAYOUT_MANAGER_H_
 
 #include "base/macros.h"
 #include "mash/shelf/public/interfaces/shelf_constants.mojom.h"
 #include "mash/wm/layout_manager.h"
 
 namespace mash {
 namespace wm {
 
 // Lays out the shelf within shelf containers.
 class ShelfLayoutManager : public LayoutManager {
  public:
   explicit ShelfLayoutManager(mus::Window* owner);
   ~ShelfLayoutManager() override;
 
-  void SetAlignment(mash::shelf::mojom::Alignment alignment);
-  void SetAutoHideBehavior(mash::shelf::mojom::AutoHideBehavior auto_hide);
+  // Returns the shelf, which may be null.
+  mus::Window* GetShelfWindow();
+
+  void SetAlignment(shelf::mojom::Alignment alignment);
+  void SetAutoHideBehavior(shelf::mojom::AutoHideBehavior auto_hide);
+
+  shelf::mojom::Alignment alignment() const { return alignment_; }
+  shelf::mojom::AutoHideBehavior auto_hide_behavior() const {
+    return auto_hide_behavior_;
+  }
 
  private:
   // Overridden from LayoutManager:
   void LayoutWindow(mus::Window* window) override;
 
-  mash::shelf::mojom::Alignment alignment_;
-  mash::shelf::mojom::AutoHideBehavior auto_hide_behavior_;
+  shelf::mojom::Alignment alignment_;
+  shelf::mojom::AutoHideBehavior auto_hide_behavior_;
 
   DISALLOW_COPY_AND_ASSIGN(ShelfLayoutManager);
 };
 
 }  // namespace wm
 }  // namespace mash
 
 #endif  // MASH_WM_SHELF_LAYOUT_MANAGER_H_