Let gesture carry microseconds timestamp

ui/base/gestures/gesture_sequence.cc

 // Copyright (c) 2012 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/base/gestures/gesture_sequence.h"
 
 #include <cmath>
 #include <stdlib.h>
 
 #include "base/logging.h"
@@ skipping 628 matching lines @@
 
 GestureEvent* GestureSequence::CreateGestureEvent(
     const GestureEventDetails& details,
     const gfx::Point& location,
     int flags,
     base::Time timestamp,
     unsigned int touch_id_bitmask) {
   GestureEventDetails gesture_details(details);
   gesture_details.set_touch_points(point_count_);
   gesture_details.set_bounding_box(bounding_box_);
+  base::TimeDelta time_stamp =
+      base::TimeDelta::FromMicroseconds(timestamp.ToDoubleT() * 1000000);
   return new GestureEvent(gesture_details.type(), location.x(), location.y(),
-      flags, base::TimeDelta::FromMilliseconds(timestamp.ToDoubleT() * 1000),
-      gesture_details, touch_id_bitmask);
+                          flags, time_stamp, gesture_details,
+                          touch_id_bitmask);
 }
 
 void GestureSequence::AppendTapDownGestureEvent(const GesturePoint& point,
                                                 Gestures* gestures) {
   gestures->push_back(CreateGestureEvent(
       GestureEventDetails(ui::ET_GESTURE_TAP_DOWN, 0, 0),
       point.first_touch_position(),
       flags_,
       base::Time::FromDoubleT(point.last_touch_time()),
       1 << point.touch_id()));
@@ skipping 475 matching lines @@
     return;
 
   // Since long press timer has been started, there should be a non-NULL point.
   const GesturePoint* point = GetPointByPointId(0);
   if (!ui::gestures::IsInsideManhattanSquare(point->first_touch_position(),
       event.location()))
     GetLongPressTimer()->Stop();
 }
 
 }  // namespace ui