aura-mus: Implement Deactivate().

mash/simple_wm/simple_wm.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 MASH_SIMPLE_WM_SIMPLE_WM_H_
 #define MASH_SIMPLE_WM_SIMPLE_WM_H_
 
 #include <memory>
 #include <utility>
 
@@ skipping 82 matching lines @@
   void OnWmDisplayModified(const display::Display& display) override;
   void OnWmPerformMoveLoop(aura::Window* window,
                            ui::mojom::MoveLoopSource source,
                            const gfx::Point& cursor_location,
                            const base::Callback<void(bool)>& on_done) override;
   void OnWmCancelMoveLoop(aura::Window* window) override;
   void OnWmSetClientArea(
       aura::Window* window,
       const gfx::Insets& insets,
       const std::vector<gfx::Rect>& additional_client_areas) override;
+  void OnWmDeactivateWindow(aura::Window* window) override;
 
   // wm::BaseFocusRules:
   bool SupportsChildActivation(aura::Window* window) const override;
   bool IsWindowConsideredVisibleForActivation(
       aura::Window* window) const override;
 
   FrameView* GetFrameViewForClientWindow(aura::Window* client_window);
 
   void OnWindowListViewItemActivated(aura::Window* index);
 
@@ skipping 14 matching lines @@
   std::unique_ptr<WorkspaceLayoutManager> workspace_layout_manager_;
 
   bool started_ = false;
 
   DISALLOW_COPY_AND_ASSIGN(SimpleWM);
 };
 
 }  // namespace simple_wm
 
 #endif  // MASH_SIMPLE_WM_SIMPLE_WM_H_