Replace scoped_ptr with std::unique_ptr in //ui

ui/wm/core/window_util.cc

 // Copyright (c) 2012 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 "ui/wm/core/window_util.h"
 
 #include "ui/aura/window.h"
 #include "ui/compositor/layer.h"
 #include "ui/compositor/layer_tree_owner.h"
 #include "ui/wm/core/transient_window_manager.h"
@@ skipping 62 matching lines @@
       aura::client::GetActivationClient(window->GetRootWindow());
   return client ? client->GetActivatableWindow(window) : NULL;
 }
 
 aura::Window* GetToplevelWindow(aura::Window* window) {
   aura::client::ActivationClient* client =
       aura::client::GetActivationClient(window->GetRootWindow());
   return client ? client->GetToplevelWindow(window) : NULL;
 }
 
-scoped_ptr<ui::LayerTreeOwner> RecreateLayers(ui::LayerOwner* root) {
-  scoped_ptr<ui::LayerTreeOwner> old_layer(
+std::unique_ptr<ui::LayerTreeOwner> RecreateLayers(ui::LayerOwner* root) {
+  std::unique_ptr<ui::LayerTreeOwner> old_layer(
       new ui::LayerTreeOwner(root->RecreateLayer().release()));
   if (old_layer->root())
     CloneChildren(root->layer(), old_layer->root());
   return old_layer;
 }
 
 aura::Window* GetTransientParent(aura::Window* window) {
   return const_cast<aura::Window*>(GetTransientParent(
                                  const_cast<const aura::Window*>(window)));
 }
@@ skipping 24 matching lines @@
 bool HasTransientAncestor(const aura::Window* window,
                           const aura::Window* ancestor) {
   const aura::Window* transient_parent = GetTransientParent(window);
   if (transient_parent == ancestor)
     return true;
   return transient_parent ?
       HasTransientAncestor(transient_parent, ancestor) : false;
 }
 
 }  // namespace wm