Replace scoped_ptr with std::unique_ptr in //ui

ui/display/chromeos/update_display_configuration_task.h

 // Copyright 2014 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 UI_DISPLAY_CHROMEOS_UPDATE_DISPLAY_CONFIGURATION_TASK_H_
 #define UI_DISPLAY_CHROMEOS_UPDATE_DISPLAY_CONFIGURATION_TASK_H_
 
 #include <stdint.h>
 
 #include <vector>
@@ skipping 88 matching lines @@
   bool force_dpms_;
 
   // List of updated displays.
   std::vector<DisplaySnapshot*> cached_displays_;
 
   // Vector of unowned VirtualDisplaySnapshots to be added when doing the task.
   std::vector<DisplaySnapshot*> virtual_display_snapshots_;
 
   gfx::Size framebuffer_size_;
 
-  scoped_ptr<ConfigureDisplaysTask> configure_task_;
+  std::unique_ptr<ConfigureDisplaysTask> configure_task_;
 
   base::WeakPtrFactory<UpdateDisplayConfigurationTask> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(UpdateDisplayConfigurationTask);
 };
 
 }  // namespace ui
 
 #endif  // UI_DISPLAY_CHROMEOS_UPDATE_DISPLAY_CONFIGURATION_TASK_H_