gesture recognizer: Reset velocities of the fingers after a pinch-end/swipe-end.

ui/base/gestures/gesture_point.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 "ui/base/gestures/gesture_point.h"
 
 #include <cmath>
 
 #include "base/basictypes.h"
 #include "ui/base/events.h"
@@ skipping 12 matching lines @@
 }
 
 GesturePoint::~GesturePoint() {}
 
 void GesturePoint::Reset() {
   first_touch_time_ = last_touch_time_ = 0.0;
   velocity_calculator_.ClearHistory();
   point_id_ = -1;
 }
 
+void GesturePoint::ResetVelocity() {
+  velocity_calculator_.ClearHistory();
+}
+
 void GesturePoint::UpdateValues(const TouchEvent& event) {
   const int64 event_timestamp_microseconds =
       event.GetTimestamp().InMicroseconds();
   if (event.GetEventType() == ui::ET_TOUCH_MOVED) {
     velocity_calculator_.PointSeen(event.GetLocation().x(),
                                    event.GetLocation().y(),
                                    event_timestamp_microseconds);
   }
 
   last_touch_time_ = event.GetTimestamp().InSecondsF();
@@ skipping 119 matching lines @@
   return manhattanDistance <
       GestureConfiguration::max_touch_move_in_pixels_for_click();
 }
 
 bool GesturePoint::IsOverMinFlickSpeed() {
   return velocity_calculator_.VelocitySquared() >
       GestureConfiguration::min_flick_speed_squared();
 }
 
 }  // namespace ui