Support additional mash shelf alignments.

ash/mus/shelf_delegate_mus.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_MUS_SHELF_DELEGATE_MUS_H_
 #define ASH_MUS_SHELF_DELEGATE_MUS_H_
 
 #include <map>
 
 #include "ash/shelf/shelf_delegate.h"
+#include "mash/wm/public/interfaces/shelf_layout.mojom.h"
 #include "mash/wm/public/interfaces/user_window_controller.mojom.h"
 #include "mojo/public/cpp/bindings/binding.h"
 
 namespace ash {
 
 class ShelfModel;
 
 namespace sysui {
 
 class ShelfDelegateMus : public ShelfDelegate,
@@ skipping 19 matching lines @@
   void OnUserWindowObserverAdded(
       mojo::Array<mash::wm::mojom::UserWindowPtr> user_windows) override;
   void OnUserWindowAdded(mash::wm::mojom::UserWindowPtr user_window) override;
   void OnUserWindowRemoved(uint32_t window_id) override;
   void OnUserWindowTitleChanged(uint32_t window_id,
                                 const mojo::String& window_title) override;
   void OnUserWindowAppIconChanged(uint32_t window_id,
                                   mojo::Array<uint8_t> app_icon) override;
   void OnUserWindowFocusChanged(uint32_t window_id, bool has_focus) override;
 
+  // Set the Mus window preferred sizes, needed by mash::wm::ShelfLayout.
+  void SetShelfPreferredSizes(Shelf* shelf);
+
   ShelfModel* model_;
 
+  mash::wm::mojom::ShelfLayoutPtr shelf_layout_;
   mash::wm::mojom::UserWindowControllerPtr user_window_controller_;
   mojo::Binding<mash::wm::mojom::UserWindowObserver> binding_;
   std::map<uint32_t, ShelfID> window_id_to_shelf_id_;
 
   DISALLOW_COPY_AND_ASSIGN(ShelfDelegateMus);
 };
 
 }  // namespace sysui
 }  // namespace ash
 
 #endif  // ASH_MUS_SHELF_DELEGATE_MUS_H_