Convert //chrome/browser/ui from scoped_ptr to std::unique_ptr

chrome/browser/ui/ash/multi_user/user_switch_animator_chromeos.cc

 // 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.
 
 #include "chrome/browser/ui/ash/multi_user/user_switch_animator_chromeos.h"
 
 #include "ash/desktop_background/user_wallpaper_delegate.h"
 #include "ash/root_window_controller.h"
 #include "ash/shelf/shelf_layout_manager.h"
 #include "ash/shelf/shelf_widget.h"
@@ skipping 61 matching lines @@
 
   void OnLayerAnimationAborted(ui::LayerAnimationSequence* sequence) override {
     delete this;
   }
 
   void OnLayerAnimationScheduled(
       ui::LayerAnimationSequence* sequence) override {}
 
  private:
   ui::LayerAnimator* animator_;
-  scoped_ptr<ui::LayerTreeOwner> old_layer_;
+  std::unique_ptr<ui::LayerTreeOwner> old_layer_;
 
   DISALLOW_COPY_AND_ASSIGN(MaximizedWindowAnimationWatcher);
 };
 
 // Modifies the given |window_list| such that the most-recently used window (if
 // any, and if it exists in |window_list|) will be the last window in the list.
 void PutMruWindowLast(std::vector<aura::Window*>* window_list) {
   DCHECK(window_list);
   auto active_window = ash::wm::GetActiveWindow();
   if (!active_window)
@@ skipping 345 matching lines @@
         if (itr != window_to_entry_map.end()) {
           windows_by_account_id_[itr->second->show_for_user()].push_back(
               child_window);
         }
       }
     }
   }
 }
 
 }  // namespace chrome