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

ui/events/ozone/evdev/event_converter_evdev.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_H_
 #define UI_EVENTS_OZONE_EVDEV_EVENT_CONVERTER_EVDEV_H_
 
 #include <stdint.h>
 
 #include <set>
@@ skipping 81 matching lines @@
   // false, all keys are allowed and |allowed_keys| is ignored.
   virtual void SetKeyFilter(bool enable_filter,
                             std::vector<DomCode> allowed_keys);
 
   // Update caps lock LED state.
   virtual void SetCapsLockLed(bool enabled);
 
   // Update touch event logging state.
   virtual void SetTouchEventLoggingEnabled(bool enabled);
 
-  // Helper to generate a base::TimeDelta from an input_event's time
-  static base::TimeDelta TimeDeltaFromInputEvent(const input_event& event);
+  // Helper to generate a base::TimeTicks from an input_event's time
+  static base::TimeTicks TimeTicksFromInputEvent(const input_event& event);
 
  protected:
   // base::MessagePumpLibevent::Watcher:
   void OnFileCanWriteWithoutBlocking(int fd) override;
 
   // File descriptor to read.
   int fd_;
 
   // Path to input device.
   base::FilePath path_;
@@ skipping 11 matching lines @@
   // Controller for watching the input fd.
   base::MessagePumpLibevent::FileDescriptorWatcher controller_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(EventConverterEvdev);
 };
 
 }  // namespace ui
 
 #endif  // UI_EVENTS_OZONE_EVDEV_EVENT_CONVERTER_EVDEV_H_