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 481 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);
 }
 
+void WindowManager::OnWmDeactivateWindow(aura::Window* window) {
+  aura::client::ActivationClient* activation_client =
+      static_cast<aura::client::ActivationClient*>(focus_controller_.get());
+  if (activation_client->GetActiveWindow() != window) {
+    DVLOG(1) << "Non-active window requested deactivation.";
+    return;
+  }
+
+  activation_client->DeactivateWindow(window);
+}
+
 void WindowManager::OnWindowInitialized(aura::Window* window) {
   // This ensures WmWindowAura won't be called before WmWindowMus. This is
   // important as if WmWindowAura::Get() is called first, then WmWindowAura
   // would be created, not WmWindowMus.
   WmWindowMus::Get(window);
 }
 
 }  // namespace mus
 }  // namespace ash