Creates mus implementation of WmShelf

mash/wm/bridge/wm_shelf_mus.h

Index: mash/wm/bridge/wm_shelf_mus.h
diff --git a/mash/wm/bridge/wm_shelf_mus.h b/mash/wm/bridge/wm_shelf_mus.h
new file mode 100644
index 0000000000000000000000000000000000000000..dfc3bdcdff7474e14e59fd56ebb78ce98c651bfb
--- /dev/null
+++ b/mash/wm/bridge/wm_shelf_mus.h
@@ -0,0 +1,50 @@
+// 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 MASH_WM_BRIDGE_WM_SHELF_MUS_H_
+#define MASH_WM_BRIDGE_WM_SHELF_MUS_H_
+
+#include <stdint.h>
+
+#include <vector>
+
+#include "ash/wm/common/shelf/wm_shelf.h"
+#include "base/macros.h"
+#include "base/observer_list.h"
+
+namespace mash {
+namespace wm {
+
+class ShelfLayoutManager;
+
+// WmShelf implementation for mus.
+class WmShelfMus : public ash::wm::WmShelf {
+ public:
+  explicit WmShelfMus(ShelfLayoutManager* shelf_layout_manager);
+  ~WmShelfMus() override;
+
+  // ash::wm::WmShelf:
+  ash::wm::WmWindow* GetWindow() override;
+  ash::wm::ShelfAlignment GetAlignment() const override;
+  ash::wm::ShelfBackgroundType GetBackgroundType() const override;
+  void UpdateVisibilityState() override;
+  ash::ShelfVisibilityState GetVisibilityState() const override;
+  void UpdateIconPositionForWindow(ash::wm::WmWindow* window) override;
+  gfx::Rect GetScreenBoundsOfItemIconForWindow(
+      ash::wm::WmWindow* window) override;
+  void AddObserver(ash::wm::WmShelfObserver* observer) override;
+  void RemoveObserver(ash::wm::WmShelfObserver* observer) override;
+
+ private:
+  base::ObserverList<ash::wm::WmShelfObserver> observers_;
+
+  ShelfLayoutManager* shelf_layout_manager_;
+
+  DISALLOW_COPY_AND_ASSIGN(WmShelfMus);
+};
+
+}  // namespace wm
+}  // namespace mash
+
+#endif  // MASH_WM_BRIDGE_WM_SHELF_MUS_H_