Replace scoped_ptr with std::unique_ptr in //ui

ui/views/widget/native_widget_aura.h

Index: ui/views/widget/native_widget_aura.h
diff --git a/ui/views/widget/native_widget_aura.h b/ui/views/widget/native_widget_aura.h
index 9e27cca806b01a69240941baa351e1e1b63d8fc7..463f066e37c77e6932b899e3ca556b9444f5fafc 100644
--- a/ui/views/widget/native_widget_aura.h
+++ b/ui/views/widget/native_widget_aura.h
@@ -213,13 +213,13 @@ class VIEWS_EXPORT NativeWidgetAura
   // The saved window state for exiting full screen state.
   ui::WindowShowState saved_window_state_;
 
-  scoped_ptr<TooltipManagerAura> tooltip_manager_;
+  std::unique_ptr<TooltipManagerAura> tooltip_manager_;
 
   // Reorders child windows of |window_| associated with a view based on the
   // order of the associated views in the widget's view hierarchy.
-  scoped_ptr<WindowReorderer> window_reorderer_;
+  std::unique_ptr<WindowReorderer> window_reorderer_;
 
-  scoped_ptr<DropHelper> drop_helper_;
+  std::unique_ptr<DropHelper> drop_helper_;
   int last_drop_operation_;
 
   // The following factory is used for calls to close the NativeWidgetAura