Postpone rail application for touch scrolling - chrome side.

ui/events/gesture_event_details.cc

Index: ui/events/gesture_event_details.cc
diff --git a/ui/events/gesture_event_details.cc b/ui/events/gesture_event_details.cc
index e14fb17302ab12fd89050b62cd4a6e25c3f5423d..1302cf83e7c10c71955c07c5726816d9f16bf294 100644
--- a/ui/events/gesture_event_details.cc
+++ b/ui/events/gesture_event_details.cc
@@ -18,24 +18,35 @@ GestureEventDetails::GestureEventDetails(ui::EventType type)
 
 GestureEventDetails::GestureEventDetails(ui::EventType type,
                                          float delta_x,
-                                         float delta_y)
+                                         float delta_y,
+                                         ScrollRailState scroll_rail_state)
     : type_(type), touch_points_(1), oldest_touch_id_(-1) {
-  DCHECK_GE(type, ET_GESTURE_TYPE_START);
-  DCHECK_LE(type, ET_GESTURE_TYPE_END);
   switch (type_) {
-    case ui::ET_GESTURE_SCROLL_BEGIN:
-      data_.scroll_begin.x_hint = delta_x;
-      data_.scroll_begin.y_hint = delta_y;
-      break;
-
     case ui::ET_GESTURE_SCROLL_UPDATE:
       data_.scroll_update.x = delta_x;
       data_.scroll_update.y = delta_y;
+      data_.scroll_update.scroll_rail_state = scroll_rail_state;
       break;
 
     case ui::ET_SCROLL_FLING_START:
-      data_.fling_velocity.x = delta_x;
-      data_.fling_velocity.y = delta_y;
+      data_.fling_start.x = delta_x;
+      data_.fling_start.y = delta_y;
+      data_.fling_start.scroll_rail_state = scroll_rail_state;
+      break;
+
+    default:
+      NOTREACHED() << "Invalid event type for constructor: " << type;
+  }
+}
+
+GestureEventDetails::GestureEventDetails(ui::EventType type,
+                                         float delta_x,
+                                         float delta_y)
+    : type_(type), touch_points_(1), oldest_touch_id_(-1) {
+  switch (type_) {
+    case ui::ET_GESTURE_SCROLL_BEGIN:
+      data_.scroll_begin.x_hint = delta_x;
+      data_.scroll_begin.y_hint = delta_y;
       break;
 
     case ui::ET_GESTURE_TWO_FINGER_TAP: