Convert //ash from scoped_ptr to std::unique_ptr

ash/sticky_keys/sticky_keys_overlay.h

 // 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.
 
 #ifndef ASH_STICKY_KEYS_STICKY_KEYS_OVERLAY_H_
 #define ASH_STICKY_KEYS_STICKY_KEYS_OVERLAY_H_
 
+#include <memory>
+
 #include "ash/ash_export.h"
 #include "ash/sticky_keys/sticky_keys_state.h"
-#include "base/memory/scoped_ptr.h"
 #include "ui/compositor/layer_animation_observer.h"
 #include "ui/events/event_constants.h"
 #include "ui/gfx/geometry/size.h"
 
 namespace gfx {
 class Rect;
 }
 
 namespace views {
 class Widget;
@@ skipping 37 matching lines @@
  private:
   // Returns the current bounds of the overlay, which is based on visibility.
   gfx::Rect CalculateOverlayBounds();
 
   // gfx::LayerAnimationObserver overrides:
   void OnLayerAnimationEnded(ui::LayerAnimationSequence* sequence) override;
   void OnLayerAnimationAborted(ui::LayerAnimationSequence* sequence) override;
   void OnLayerAnimationScheduled(ui::LayerAnimationSequence* sequence) override;
 
   bool is_visible_;
-  scoped_ptr<views::Widget> overlay_widget_;
-  scoped_ptr<StickyKeysOverlayView> overlay_view_;
+  std::unique_ptr<views::Widget> overlay_widget_;
+  std::unique_ptr<StickyKeysOverlayView> overlay_view_;
   gfx::Size widget_size_;
 };
 
 }  // namespace ash
 
 #endif  // ASH_STICKY_KEYS_STICKY_KEYS_OVERLAY_H_