replace OVERRIDE and FINAL with override and final in ui/

ui/events/platform/x11/x11_event_source_libevent.cc

Index: ui/events/platform/x11/x11_event_source_libevent.cc
diff --git a/ui/events/platform/x11/x11_event_source_libevent.cc b/ui/events/platform/x11/x11_event_source_libevent.cc
index d92e12a5d82cd911577c0bf1ff3142b643fab216..8ad7931b3f0df3d825eac818ddea7fc83ca221f5 100644
--- a/ui/events/platform/x11/x11_event_source_libevent.cc
+++ b/ui/events/platform/x11/x11_event_source_libevent.cc
@@ -39,16 +39,16 @@ class X11EventSourceLibevent : public X11EventSource,
   }
 
   // PlatformEventSource:
-  virtual void OnDispatcherListChanged() OVERRIDE {
+  virtual void OnDispatcherListChanged() override {
     AddEventWatcher();
   }
 
   // base::MessagePumpLibevent::Watcher:
-  virtual void OnFileCanReadWithoutBlocking(int fd) OVERRIDE {
+  virtual void OnFileCanReadWithoutBlocking(int fd) override {
     DispatchXEvents();
   }
 
-  virtual void OnFileCanWriteWithoutBlocking(int fd) OVERRIDE {
+  virtual void OnFileCanWriteWithoutBlocking(int fd) override {
     NOTREACHED();
   }