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

ash/wm/system_gesture_event_filter_unittest.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 "ash/wm/system_gesture_event_filter.h"
 
 #include <vector>
 
 #include "ash/accelerators/accelerator_controller.h"
 #include "ash/display/display_manager.h"
@@ skipping 126 matching lines @@
 };
 
 ui::GestureEvent* CreateGesture(ui::EventType type,
                                 int x,
                                 int y,
                                 float delta_x,
                                 float delta_y,
                                 int touch_id) {
   ui::GestureEventDetails details =
       ui::GestureEventDetails(type, delta_x, delta_y);
-  return new ui::GestureEvent(x, y, 0,
-      base::TimeDelta::FromMilliseconds(base::Time::Now().ToDoubleT() * 1000),
-      ui::GestureEventDetails(type, delta_x, delta_y));
+  return new ui::GestureEvent(x, y, 0, base::TimeTicks::Now(),
+                              ui::GestureEventDetails(type, delta_x, delta_y));
 }
 
 TEST_F(SystemGestureEventFilterTest, TwoFingerDrag) {
   gfx::Rect bounds(0, 0, 600, 600);
   aura::Window* root_window = Shell::GetPrimaryRootWindow();
   views::Widget* toplevel = views::Widget::CreateWindowWithContextAndBounds(
       new ResizableWidgetDelegate, root_window, bounds);
   toplevel->Show();
 
   const int kSteps = 15;
@@ skipping 318 matching lines @@
   for (int i = 1; i <= 3; ++i)
     GetEventGenerator().ReleaseTouchId(i);
   EXPECT_EQ(event_handler.num_gesture_events(),
             delegate.GetGestureCountAndReset());
 
   aura::Env::GetInstance()->RemovePreTargetHandler(&event_handler);
 }
 
 }  // namespace test
 }  // namespace ash