Convert //ash from scoped_ptr to std::unique_ptr

ash/wm/workspace/workspace_layout_manager.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_WORKSPACE_LAYOUT_MANAGER_H_
 #define ASH_WM_WORKSPACE_WORKSPACE_LAYOUT_MANAGER_H_
 
+#include <memory>
 #include <set>
 
 #include "ash/ash_export.h"
 #include "ash/shell_observer.h"
 #include "ash/wm/window_state_observer.h"
 #include "ash/wm/wm_types.h"
 #include "base/compiler_specific.h"
 #include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
 #include "ui/aura/layout_manager.h"
 #include "ui/aura/window_observer.h"
 #include "ui/gfx/geometry/rect.h"
 #include "ui/keyboard/keyboard_controller_observer.h"
 #include "ui/wm/public/activation_change_observer.h"
 
 namespace aura {
 class RootWindow;
 class Window;
 }
@@ skipping 22 matching lines @@
  public:
   explicit WorkspaceLayoutManager(aura::Window* window);
   ~WorkspaceLayoutManager() override;
 
   void SetShelf(ShelfLayoutManager* shelf);
 
   // A delegate which can be set to add a backdrop behind the top most visible
   // window. With the call the ownership of the delegate will be transferred to
   // the WorkspaceLayoutManager.
   void SetMaximizeBackdropDelegate(
-      scoped_ptr<WorkspaceLayoutManagerDelegate> delegate);
+      std::unique_ptr<WorkspaceLayoutManagerDelegate> delegate);
 
   // Overridden from aura::LayoutManager:
   void OnWindowResized() override {}
   void OnWindowAddedToLayout(aura::Window* child) override;
   void OnWillRemoveWindowFromLayout(aura::Window* child) override;
   void OnWindowRemovedFromLayout(aura::Window* child) override;
   void OnChildWindowVisibilityChanged(aura::Window* child,
                                       bool visibile) override;
   void SetChildBounds(aura::Window* child,
                       const gfx::Rect& requested_bounds) override;
@@ skipping 67 matching lines @@
   WindowSet windows_;
 
   // The work area in the coordinates of |window_|.
   gfx::Rect work_area_in_parent_;
 
   // True if this workspace is currently in fullscreen mode.
   bool is_fullscreen_;
 
   // A window which covers the full container and which gets inserted behind the
   // topmost visible window.
-  scoped_ptr<WorkspaceLayoutManagerDelegate> backdrop_delegate_;
+  std::unique_ptr<WorkspaceLayoutManagerDelegate> backdrop_delegate_;
 
   DISALLOW_COPY_AND_ASSIGN(WorkspaceLayoutManager);
 };
 
 }  // namespace ash
 
 #endif  // ASH_WM_WORKSPACE_WORKSPACE_LAYOUT_MANAGER_H_