Replace scoped_ptr with std::unique_ptr in //ui

ui/events/gesture_detection/velocity_tracker.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 UI_EVENTS_GESTURE_DETECTION_VELOCITY_TRACKER_H_
 #define UI_EVENTS_GESTURE_DETECTION_VELOCITY_TRACKER_H_
 
 #include <stdint.h>
 
+#include <memory>
+
 #include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
 #include "base/time/time.h"
 #include "ui/events/gesture_detection/bitset_32.h"
 
 namespace ui {
 
 class MotionEvent;
 class VelocityTrackerStrategy;
 
 namespace {
 struct Estimator;
@@ skipping 115 matching lines @@
                    BitSet32 id_bits,
                    const Position* positions);
 
   // Gets an estimator for the recent movements of the specified pointer id.
   // Returns false if the pointer velocity is unknown.
   bool GetEstimator(uint32_t id, Estimator* out_estimator) const;
 
   base::TimeTicks last_event_time_;
   BitSet32 current_pointer_id_bits_;
   int32_t active_pointer_id_;
-  scoped_ptr<VelocityTrackerStrategy> strategy_;
+  std::unique_ptr<VelocityTrackerStrategy> strategy_;
 
   DISALLOW_COPY_AND_ASSIGN(VelocityTracker);
 };
 
 }  // namespace ui
 
 #endif  // UI_EVENTS_GESTURE_DETECTION_VELOCITY_TRACKER_H_