Convert //ash from scoped_ptr to std::unique_ptr

ash/sticky_keys/sticky_keys_overlay.h

Index: ash/sticky_keys/sticky_keys_overlay.h
diff --git a/ash/sticky_keys/sticky_keys_overlay.h b/ash/sticky_keys/sticky_keys_overlay.h
index 5062636b81853caa5754c703bcadd38e944a4923..3529ffb27e1b202dab54d93b30ee11396ca75a53 100644
--- a/ash/sticky_keys/sticky_keys_overlay.h
+++ b/ash/sticky_keys/sticky_keys_overlay.h
@@ -5,9 +5,10 @@
 #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"
@@ -65,8 +66,8 @@ class ASH_EXPORT StickyKeysOverlay : public ui::LayerAnimationObserver {
   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_;
 };