Update the X11 keycodes when keys are remapped.

base/message_pump_glib_x.cc

Index: base/message_pump_glib_x.cc
diff --git a/base/message_pump_glib_x.cc b/base/message_pump_glib_x.cc
index b4d677ef25effef3f03bbcabe3f5708b9d7d2f51..64248048d08df2546ac134a88fde82587ae13f2c 100644
--- a/base/message_pump_glib_x.cc
+++ b/base/message_pump_glib_x.cc
@@ -79,7 +79,6 @@ bool MessagePumpGlibX::RunOnce(GMainContext* context, bool block) {
           should_quit = true;
           Quit();
         } else if (status == MessagePumpGlibXDispatcher::EVENT_IGNORED) {
-          DLOG(WARNING) << "Event (" << xev.type << ") not handled.";
         }
       }
 
@@ -171,6 +170,8 @@ void MessagePumpGlibX::InitializeEventsToCapture(void) {
   capture_x_events_[MotionNotify] = true;
   capture_gdk_events_[GDK_MOTION_NOTIFY] = true;
 
+  capture_x_events_[MappingNotify] = true;
+
 #if defined(HAVE_XINPUT2)
   capture_x_events_[GenericEvent] = true;
 #endif