events: Remove KeyEvent::Copy().

ui/events/event.cc

Index: ui/events/event.cc
diff --git a/ui/events/event.cc b/ui/events/event.cc
index 1e4bdd0e6470a1ccd969cd1e671a891f6e7e216c..63202cb0ba855a30fee3e610e59b9c99b96ee530 100644
--- a/ui/events/event.cc
+++ b/ui/events/event.cc
@@ -567,20 +567,6 @@ uint16 KeyEvent::GetCharacter() const {
 #endif
 }
 
-KeyEvent* KeyEvent::Copy() const {
-#if defined(USE_OZONE)
-  KeyEvent* copy = new KeyEvent(*this);
-#else
-  KeyEvent* copy = HasNativeEvent() ?
-      new KeyEvent(::CopyNativeEvent(native_event()), is_char()) :
-      new KeyEvent(*this);
-#endif
-#if defined(USE_X11)
-  copy->set_delete_native_event(true);
-#endif
-  return copy;
-}
-
 bool KeyEvent::IsUnicodeKeyCode() const {
   if (!IsAltDown())
     return false;