Revert of Removing X11 native_event uses for key events.

ui/events/ozone/events_ozone.cc

Index: ui/events/ozone/events_ozone.cc
diff --git a/ui/events/ozone/events_ozone.cc b/ui/events/ozone/events_ozone.cc
index 65ad063dde3525431ba51a24c5e1735c7d359e34..57892532c32374e24be8d1b0f3d256ad92ce3516 100644
--- a/ui/events/ozone/events_ozone.cc
+++ b/ui/events/ozone/events_ozone.cc
@@ -68,6 +68,21 @@
   const ui::KeyEvent* event = static_cast<const ui::KeyEvent*>(native_event);
   DCHECK(event->IsKeyEvent());
   return event->is_char();
+}
+
+uint32 WindowsKeycodeFromNative(const base::NativeEvent& native_event) {
+  NOTIMPLEMENTED();
+  return 0;
+}
+
+uint16 TextFromNative(const base::NativeEvent& native_event) {
+  NOTIMPLEMENTED();
+  return 0;
+}
+
+uint16 UnmodifiedTextFromNative(const base::NativeEvent& native_event) {
+  NOTIMPLEMENTED();
+  return 0;
 }
 
 gfx::Vector2d GetMouseWheelOffset(const base::NativeEvent& native_event) {