Set focusibility correctly when initializing a window in mus+ash.

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 303 matching lines @@
   }
   return name == ui::mojom::WindowManager::kAppIcon_Property ||
          name == ui::mojom::WindowManager::kShowState_Property ||
          name == ui::mojom::WindowManager::kPreferredSize_Property ||
          name == ui::mojom::WindowManager::kResizeBehavior_Property ||
          name == ui::mojom::WindowManager::kShelfItemType_Property ||
          name == ui::mojom::WindowManager::kWindowIcon_Property ||
          name == ui::mojom::WindowManager::kWindowTitle_Property;
 }
 
+void WindowManager::OnWmSetCanFocus(aura::Window* window, bool can_focus) {
+  window_tree_client()->SetCanFocus(window, can_focus);

[sky, 2017/01/26 18:59:04]

This value (and the initial one) should feed into
NonClientFrameController::CanActivate().

[Hadi, 2017/01/26 20:23:17]

I think Done. Can you please take a look to see if I did it correctly?

Thanks.

+}
+
 aura::Window* WindowManager::OnWmCreateTopLevelWindow(
     ui::mojom::WindowType window_type,
     std::map<std::string, std::vector<uint8_t>>* properties) {
   if (window_type == ui::mojom::WindowType::UNKNOWN) {
     LOG(WARNING) << "Request to create top level of unknown type, failing";
     return nullptr;
   }
 
   return CreateAndParentTopLevelWindow(this, window_type, properties);
 }
@@ skipping 114 matching lines @@
 bool WindowManager::IsWindowActive(aura::Window* window) {
   return Shell::GetInstance()->activation_client()->GetActiveWindow() == window;
 }
 
 void WindowManager::OnWmDeactivateWindow(aura::Window* window) {
   Shell::GetInstance()->activation_client()->DeactivateWindow(window);
 }
 
 }  // namespace mus
 }  // namespace ash