Change ui::Event::time_stamp from TimeDelta to TimeTicks

ui/events/events_default.cc

 // Copyright (c) 2013 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/event.h"
 #include "ui/events/event_constants.h"
 #include "ui/events/event_utils.h"
 
 namespace ui {
 
-base::TimeDelta EventTimeFromNative(const base::NativeEvent& native_event) {
+base::TimeTicks EventTimeFromNative(const base::NativeEvent& native_event) {
   const ui::Event* event = static_cast<const ui::Event*>(native_event);
   return event->time_stamp();
 }
 
 int EventFlagsFromNative(const base::NativeEvent& native_event) {
   const ui::Event* event = static_cast<const ui::Event*>(native_event);
   return event->flags();
 }
 
 EventType EventTypeFromNative(const base::NativeEvent& native_event) {
@@ skipping 127 matching lines @@
     *vx_ordinal = event->x_offset_ordinal();
   if (vy_ordinal)
     *vy_ordinal = event->y_offset_ordinal();
   if (is_cancel)
     *is_cancel = event->type() == ET_SCROLL_FLING_CANCEL;
 
   return true;
 }
 
 }  // namespace ui