Replace scoped_ptr with std::unique_ptr in //ui

ui/accessibility/ax_node_data.h

 // Copyright 2013 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_ACCESSIBILITY_AX_NODE_DATA_H_
 #define UI_ACCESSIBILITY_AX_NODE_DATA_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 106 matching lines @@
   std::vector<int32_t> child_ids;
 
   // The object's location relative to its window or frame.
   gfx::Rect location;
 
   // An additional transform to apply to position this object and its subtree.
   // NOTE: this member is a scoped_ptr because it's rare and gfx::Transform
   // takes up a fair amount of space. The assignment operator and copy
   // constructor both make a duplicate of the owned pointer, so it acts more
   // like a member than a pointer.
-  scoped_ptr<gfx::Transform> transform;
+  std::unique_ptr<gfx::Transform> transform;
 };
 
 }  // namespace ui
 
 #endif  // UI_ACCESSIBILITY_AX_NODE_DATA_H_