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

ui/events/test/events_test_utils_x11.cc

 // Copyright 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/test/events_test_utils_x11.h"
 
 #include <stddef.h>
 #include <X11/extensions/XI2.h>
 #include <X11/keysym.h>
 #include <X11/X.h>
@@ skipping 276 matching lines @@
         DeviceDataManagerX11::DT_TOUCH_RAW_TIMESTAMP) {
       SetUpValuators(valuators);
       return;
     }
   }
 
   // No timestamp was specified. Use |ui::EventTimeForNow()|.
   std::vector<Valuator> valuators_with_time = valuators;
   valuators_with_time.push_back(
       Valuator(DeviceDataManagerX11::DT_TOUCH_RAW_TIMESTAMP,
-               (ui::EventTimeForNow()).InMicroseconds()));
+               (ui::EventTimeForNow() - base::TimeTicks()).InMicroseconds()));
   SetUpValuators(valuators_with_time);
 }
 
 void ScopedXI2Event::SetUpValuators(const std::vector<Valuator>& valuators) {
   CHECK(event_.get());
   CHECK_EQ(GenericEvent, event_->type);
   XIDeviceEvent* xiev = static_cast<XIDeviceEvent*>(event_->xcookie.data);
   InitValuatorsForXIDeviceEvent(xiev);
   ui::DeviceDataManagerX11* manager = ui::DeviceDataManagerX11::GetInstance();
   for (size_t i = 0; i < valuators.size(); ++i) {
@@ skipping 20 matching lines @@
 }
 
 void SetUpPointerDevicesForTest(const std::vector<int>& devices) {
   TouchFactory::GetInstance()->SetPointerDeviceForTest(devices);
   ui::DeviceDataManagerX11* manager = ui::DeviceDataManagerX11::GetInstance();
   manager->SetDeviceListForTest(std::vector<int>(), std::vector<int>(),
                                 devices);
 }
 
 }  // namespace ui