Convert //ash from scoped_ptr to std::unique_ptr

ash/wm/workspace_controller.h

 // 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.
 
 #ifndef ASH_WM_WORKSPACE_CONTROLLER_H_
 #define ASH_WM_WORKSPACE_CONTROLLER_H_
 
+#include <memory>
+
 #include "ash/ash_export.h"
 #include "ash/wm/workspace/workspace_types.h"
 #include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
 
 namespace aura {
 class Window;
 }
 
 namespace ash {
 class ShelfLayoutManager;
 class WorkspaceControllerTestHelper;
 class WorkspaceEventHandler;
 class WorkspaceLayoutManager;
@@ skipping 10 matching lines @@
   WorkspaceWindowState GetWindowState() const;
 
   void SetShelf(ShelfLayoutManager* shelf);
 
   // Starts the animation that occurs on first login.
   void DoInitialAnimation();
 
   // Add a delegate which adds a backdrop behind the top window of the default
   // workspace.
   void SetMaximizeBackdropDelegate(
-      scoped_ptr<WorkspaceLayoutManagerDelegate> delegate);
+      std::unique_ptr<WorkspaceLayoutManagerDelegate> delegate);
 
   WorkspaceLayoutManager* layout_manager() { return layout_manager_; }
 
  private:
   friend class WorkspaceControllerTestHelper;
 
   aura::Window* viewport_;
 
   ShelfLayoutManager* shelf_;
-  scoped_ptr<WorkspaceEventHandler> event_handler_;
+  std::unique_ptr<WorkspaceEventHandler> event_handler_;
   WorkspaceLayoutManager* layout_manager_;
 
   DISALLOW_COPY_AND_ASSIGN(WorkspaceController);
 };
 
 }  // namespace ash
 
 #endif  // ASH_WM_WORKSPACE_CONTROLLER_H_