Convert //ash from scoped_ptr to std::unique_ptr

ash/wm/gestures/long_press_affordance_handler.h

Index: ash/wm/gestures/long_press_affordance_handler.h
diff --git a/ash/wm/gestures/long_press_affordance_handler.h b/ash/wm/gestures/long_press_affordance_handler.h
index 187e5c41cca9fa10baf34c4f4f99f03126fd51b4..4c6d3ac6719f3332214c9c7f277c37c387a998a9 100644
--- a/ash/wm/gestures/long_press_affordance_handler.h
+++ b/ash/wm/gestures/long_press_affordance_handler.h
@@ -5,8 +5,9 @@
 #ifndef ASH_WM_GESTURES_LONG_PRESS_AFFORDANCE_HANDLER_H_
 #define ASH_WM_GESTURES_LONG_PRESS_AFFORDANCE_HANDLER_H_
 
+#include <memory>
+
 #include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
 #include "base/timer/timer.h"
 #include "ui/aura/window_observer.h"
 #include "ui/gfx/animation/linear_animation.h"
@@ -60,7 +61,7 @@ class LongPressAffordanceHandler : public gfx::LinearAnimation,
   // Overridden from aura::WindowObserver.
   void OnWindowDestroying(aura::Window* window) override;
 
-  scoped_ptr<LongPressAffordanceView> view_;
+  std::unique_ptr<LongPressAffordanceView> view_;
   gfx::Point tap_down_location_;
   base::OneShotTimer timer_;
   aura::Window* tap_down_target_;