aura-mus: Implement Deactivate().

ash/mus/window_manager.cc

 // 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.
 
 #include "ash/mus/window_manager.h"
 
 #include <stdint.h>
 
 #include <utility>
 
@@ skipping 489 matching lines @@
     aura::Window* window,
     const gfx::Insets& insets,
     const std::vector<gfx::Rect>& additional_client_areas) {
   NonClientFrameController* non_client_frame_controller =
       NonClientFrameController::Get(window);
   if (!non_client_frame_controller)
     return;
   non_client_frame_controller->SetClientArea(insets, additional_client_areas);
 }
 
+bool WindowManager::IsWindowActive(aura::Window* window) {
+  return activation_client()->GetActiveWindow() == window;
+}
+
+void WindowManager::OnWmDeactivateWindow(aura::Window* window) {
+  activation_client()->DeactivateWindow(window);
+}
+
 }  // namespace mus
 }  // namespace ash