virtual/override specifier cleanup in ui/ (mostly Ozone code).

ui/events/ozone/evdev/tablet_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_TABLET_EVENT_CONVERTER_EVDEV_H_
 #define UI_EVENTS_OZONE_TABLET_EVENT_CONVERTER_EVDEV_H_
 
 #include "base/files/file_path.h"
 #include "base/message_loop/message_pump_libevent.h"
 #include "ui/events/event.h"
@@ skipping 11 matching lines @@
     : public EventConverterEvdev {
  public:
   TabletEventConverterEvdev(int fd,
                             base::FilePath path,
                             int id,
                             InputDeviceType type,
                             EventModifiersEvdev* modifiers,
                             CursorDelegateEvdev* cursor,
                             const EventDeviceInfo& info,
                             const EventDispatchCallback& callback);
-  virtual ~TabletEventConverterEvdev();
+  ~TabletEventConverterEvdev() override;
 
   // EventConverterEvdev:
   void OnFileCanReadWithoutBlocking(int fd) override;
 
   void ProcessEvents(const struct input_event* inputs, int count);
 
  private:
   friend class MockTabletEventConverterEvdev;
   void ConvertKeyEvent(const input_event& input);
   void ConvertAbsEvent(const input_event& input);
@@ skipping 28 matching lines @@
 
   // Whether we need to move the cursor
   bool abs_value_dirty_;
 
   DISALLOW_COPY_AND_ASSIGN(TabletEventConverterEvdev);
 };
 
 }  // namespace ui
 
 #endif  // UI_EVENTS_OZONE_TABLET_EVENT_CONVERTER_EVDEV_H_