[Android] Support double-tap selection

ui/events/gestures/gesture_provider_aura.cc

Index: ui/events/gestures/gesture_provider_aura.cc
diff --git a/ui/events/gestures/gesture_provider_aura.cc b/ui/events/gestures/gesture_provider_aura.cc
index b491a2f0b85023e85765cd299c921f553e247101..4d9e6fc1176ae3e828f03b21b2b5334224076693 100644
--- a/ui/events/gestures/gesture_provider_aura.cc
+++ b/ui/events/gestures/gesture_provider_aura.cc
@@ -49,21 +49,6 @@ void GestureProviderAura::OnGestureEvent(
     const GestureEventData& gesture) {
   GestureEventDetails details = gesture.details;
   details.set_oldest_touch_id(gesture.motion_event_id);
-
-  if (gesture.type() == ET_GESTURE_TAP) {
-    int tap_count = 1;
-    if (previous_tap_ && IsConsideredDoubleTap(*previous_tap_, gesture))
-      tap_count = 1 + (previous_tap_->details.tap_count() % 3);
-    details.set_tap_count(tap_count);
-    if (!previous_tap_)
-      previous_tap_.reset(new GestureEventData(gesture));
-    else
-      *previous_tap_ = gesture;
-    previous_tap_->details = details;
-  } else if (gesture.type() == ET_GESTURE_TAP_CANCEL) {
-    previous_tap_.reset();
-  }
-
   scoped_ptr<ui::GestureEvent> event(
       new ui::GestureEvent(gesture.x,
                            gesture.y,
@@ -90,23 +75,4 @@ ScopedVector<GestureEvent>* GestureProviderAura::GetAndResetPendingGestures() {
   return old_pending_gestures;
 }
 
-bool GestureProviderAura::IsConsideredDoubleTap(
-    const GestureEventData& previous_tap,
-    const GestureEventData& current_tap) const {
-  if (current_tap.time - previous_tap.time >
-      base::TimeDelta::FromMilliseconds(
-          GestureConfiguration::GetInstance()
-              ->max_time_between_double_click_in_ms())) {
-    return false;
-  }
-
-  float double_tap_slop_square =
-      GestureConfiguration::GetInstance()
-          ->max_distance_between_taps_for_double_tap();
-  double_tap_slop_square *= double_tap_slop_square;
-  const float delta_x = previous_tap.x - current_tap.x;
-  const float delta_y = previous_tap.y - current_tap.y;
-  return (delta_x * delta_x + delta_y * delta_y < double_tap_slop_square);
-}
-
 }  // namespace content