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

ui/base/gestures/gesture_sequence.cc

Index: ui/base/gestures/gesture_sequence.cc
diff --git a/ui/base/gestures/gesture_sequence.cc b/ui/base/gestures/gesture_sequence.cc
index fcab299e103e4b4b69563a53584497dbb4f9ee67..738d93fc3b9b0377ad0a1298488d883c4ee706d7 100644
--- a/ui/base/gestures/gesture_sequence.cc
+++ b/ui/base/gestures/gesture_sequence.cc
@@ -269,6 +269,9 @@ GestureSequence::Gestures* GestureSequence::ProcessTouchEventForGesture(
     case GST_THREE_FINGER_SWIPE_FIRST_CANCELLED:
     case GST_THREE_FINGER_SWIPE_SECOND_CANCELLED:
     case GST_THREE_FINGER_SWIPE_THIRD_CANCELLED:
+      GetPointByPointId(0)->ResetVelocity();
+      GetPointByPointId(1)->ResetVelocity();
+      GetPointByPointId(2)->ResetVelocity();
       set_state(GS_PINCH);
       break;
     case GST_THREE_FINGER_SWIPE_FIRST_MOVED:
@@ -651,13 +654,16 @@ bool GestureSequence::PinchEnd(const TouchEvent& event,
     const GesturePoint& point, Gestures* gestures) {
   DCHECK(state_ == GS_PINCH);
 
-  const GesturePoint* point1 = GetPointByPointId(0);
-  const GesturePoint* point2 = GetPointByPointId(1);
+  GesturePoint* point1 = GetPointByPointId(0);
+  GesturePoint* point2 = GetPointByPointId(1);
 
   float distance = point1->Distance(*point2);
   AppendPinchGestureEnd(*point1, *point2,
       distance / pinch_distance_start_, gestures);
 
+  point1->ResetVelocity();
+  point2->ResetVelocity();
+
   pinch_distance_start_ = 0;
   pinch_distance_current_ = 0;
   return true;