Converts WindowManagerTest.OpenWindow to aura-mus

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 382 matching lines @@
          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;
 }
 
 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 NewTopLevelWindow(window_type, properties);
 }
 
 void WindowManager::OnWmClientJankinessChanged(
     const std::set<aura::Window*>& client_windows,
     bool janky) {
   for (auto* window : client_windows)
     window->SetProperty(kWindowIsJanky, janky);
 }
 
@@ skipping 90 matching lines @@
 
 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