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

ui/events/ozone/evdev/event_converter_evdev_impl.h

 // 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.
 
 #ifndef UI_EVENTS_OZONE_EVDEV_EVENT_CONVERTER_EVDEV_IMPL_H_
 #define UI_EVENTS_OZONE_EVDEV_EVENT_CONVERTER_EVDEV_IMPL_H_
 
 #include <bitset>
 
 #include "base/files/file_path.h"
@@ skipping 35 matching lines @@
                     std::vector<DomCode> allowed_keys) override;
   void OnDisabled() override;
 
   void ProcessEvents(const struct input_event* inputs, int count);
 
  private:
   void ConvertKeyEvent(const input_event& input);
   void ConvertMouseMoveEvent(const input_event& input);
   void OnKeyChange(unsigned int key,
                    bool down,
-                   const base::TimeDelta& timestamp);
+                   const base::TimeTicks& timestamp);
   void ReleaseKeys();
   void ReleaseMouseButtons();
   void OnLostSync();
   void DispatchMouseButton(const input_event& input);
-  void OnButtonChange(int code, bool down, const base::TimeDelta& timestamp);
+  void OnButtonChange(int code, bool down, base::TimeTicks timestamp);
 
   // Flush events delimited by EV_SYN. This is useful for handling
   // non-axis-aligned movement properly.
   void FlushEvents(const input_event& input);
 
   // Input modalities for this device.
   bool has_keyboard_;
   bool has_touchpad_;
 
   // LEDs for this device.
@@ skipping 24 matching lines @@
   // Callbacks for dispatching events.
   DeviceEventDispatcherEvdev* dispatcher_;
 
   DISALLOW_COPY_AND_ASSIGN(EventConverterEvdevImpl);
 };
 
 }  // namespace ui
 
 #endif  // UI_EVENTS_OZONE_EVDEV_EVENT_CONVERTER_EVDEV_IMPL_H_