ozone: evdev: Use tracking id for TouchEvent finger id

ui/events/ozone/evdev/touch_event_converter_evdev.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/ozone/evdev/touch_event_converter_evdev.h"
 
 #include <errno.h>
 #include <fcntl.h>
 #include <linux/input.h>
 #include <poll.h>
@@ skipping 262 matching lines @@
       break;
     default:
       NOTIMPLEMENTED() << "invalid code for EV_SYN: " << input.code;
   }
 }
 
 void TouchEventConverterEvdev::ReportEvents(base::TimeDelta delta) {
   for (int i = 0; i < MAX_FINGERS; i++) {
     if (altered_slots_[i]) {
       // TODO(rikroege): Support elliptical finger regions.
-      TouchEvent evt(
-          events_[i].type_,
-          gfx::PointF(events_[i].x_, events_[i].y_),
-          /* flags */ 0,
-          /* touch_id */ i,
-          delta,
-          events_[i].pressure_ * kFingerWidth,
-          events_[i].pressure_ * kFingerWidth,
-          /* angle */ 0.,
-          events_[i].pressure_);
+      TouchEvent evt(events_[i].type_,
+                     gfx::PointF(events_[i].x_, events_[i].y_),
+                     /* flags */ 0,
+                     /* touch_id */ events_[i].finger_,
+                     delta,
+                     events_[i].pressure_ * kFingerWidth,
+                     events_[i].pressure_ * kFingerWidth,
+                     /* angle */ 0.,
+                     events_[i].pressure_);
       DispatchEventToCallback(&evt);
 
       // Subsequent events for this finger will be touch-move until it
       // is released.
       events_[i].type_ = ET_TOUCH_MOVED;
     }
   }
   altered_slots_.reset();
 }
 
 }  // namespace ui