Use std::default_delete as the default deleter for scoped_ptr.

ui/events/gesture_detection/scale_gesture_detector.cc

 // 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.
 
 #include "ui/events/gesture_detection/scale_gesture_detector.h"
 
 #include <limits.h>
 
+#include <algorithm>
 #include <cmath>
 
 #include "base/logging.h"
 #include "ui/events/gesture_detection/motion_event.h"
 #include "ui/events/gesture_detection/scale_gesture_listeners.h"
 
 using base::TimeDelta;
 using base::TimeTicks;
 
 namespace ui {
@@ skipping 345 matching lines @@
   touch_history_last_accepted_time_ = base::TimeTicks();
 }
 
 void ScaleGestureDetector::ResetScaleWithSpan(float span) {
   in_progress_ = false;
   initial_span_ = span;
   anchored_scale_mode_ = ANCHORED_SCALE_MODE_NONE;
 }
 
 }  // namespace ui