Listen to XI_HierarchyChanged events and call setxkbmap when needed.

chrome/browser/chromeos/input_method/xkeyboard.h

Index: chrome/browser/chromeos/input_method/xkeyboard.h
diff --git a/chrome/browser/chromeos/input_method/xkeyboard.h b/chrome/browser/chromeos/input_method/xkeyboard.h
index df938c51124089f8134f97a04dddd6d1f1dc3109..79c7dd52bf9f6e0d6b7a489947353e88cba1af8b 100644
--- a/chrome/browser/chromeos/input_method/xkeyboard.h
+++ b/chrome/browser/chromeos/input_method/xkeyboard.h
@@ -46,6 +46,11 @@ typedef std::vector<ModifierKeyPair> ModifierMap;
 // change the current mapping of the modifier keys. Returns true on success.
 bool SetCurrentKeyboardLayoutByName(const std::string& layout_name);
 
+// Sets the current keyboard layout again. We have to call the function every
+// time when "XI_HierarchyChanged" XInput2 event is sent to Chrome. See
+// xinput_hierarchy_changed_event_listener.h for details.
+bool ReapplyCurrentKeyboardLayout();
+
 // Remaps modifier keys. This function does not change the current keyboard
 // layout. Returns true on success.
 // Notice: For now, you can't remap Left Control and Left Alt keys to CapsLock.