Replaces ::ui:: with ui:: in ash

ash/mus/test/wm_test_helper.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 ASH_MUS_TEST_WM_TEST_HELPER_H_
 #define ASH_MUS_TEST_WM_TEST_HELPER_H_
 
 #include <memory>
 
 #include "ash/mus/window_manager_application.h"
@@ skipping 27 matching lines @@
   void Init();
 
   WindowManagerApplication* window_manager_app() {
     return &window_manager_app_;
   }
 
   WmTestScreen* screen() { return screen_; }
 
  private:
   std::unique_ptr<base::MessageLoop> message_loop_;
-  ::ui::TestWindowTreeClientSetup window_tree_client_setup_;
+  ui::TestWindowTreeClientSetup window_tree_client_setup_;
   WindowManagerApplication window_manager_app_;
   WmTestScreen* screen_ = nullptr;  // Owned by |window_manager_app_|.
 
   DISALLOW_COPY_AND_ASSIGN(WmTestHelper);
 };
 
 }  // namespace mus
 }  // namespace ash
 
 #endif  // ASH_MUS_TEST_WM_TEST_HELPER_H_