Convert //ash from scoped_ptr to std::unique_ptr

ash/wm/gestures/long_press_affordance_handler.cc

 // 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.
 
 #include "ash/wm/gestures/long_press_affordance_handler.h"
 
+#include <memory>
+
 #include "ash/root_window_controller.h"
 #include "ash/shell.h"
 #include "ash/shell_window_ids.h"
 #include "third_party/skia/include/core/SkColor.h"
 #include "third_party/skia/include/core/SkPaint.h"
 #include "third_party/skia/include/core/SkPath.h"
 #include "third_party/skia/include/core/SkRect.h"
 #include "third_party/skia/include/effects/SkGradientShader.h"
 #include "ui/aura/client/screen_position_client.h"
 #include "ui/aura/window.h"
@@ skipping 189 matching lines @@
     // Paint inner circle.
     PaintAffordanceArc(canvas, center, kAffordanceInnerRadius,
         kAffordanceInnerStartAngle, -current_angle_);
     // Paint outer circle.
     PaintAffordanceArc(canvas, center, kAffordanceOuterRadius,
         kAffordanceOuterStartAngle, current_angle_);
 
     canvas->Restore();
   }
 
-  scoped_ptr<views::Widget> widget_;
+  std::unique_ptr<views::Widget> widget_;
   int current_angle_;
   double current_scale_;
 
   DISALLOW_COPY_AND_ASSIGN(LongPressAffordanceView);
 };
 
 ////////////////////////////////////////////////////////////////////////////////
 // LongPressAffordanceHandler, public
 
 LongPressAffordanceHandler::LongPressAffordanceHandler()
@@ skipping 121 matching lines @@
       break;
   }
 }
 
 void LongPressAffordanceHandler::OnWindowDestroying(aura::Window* window) {
   DCHECK_EQ(tap_down_target_, window);
   StopAffordance();
 }
 
 }  // namespace ash