Listen to XI_HierarchyChanged events and call setxkbmap when needed.

chrome/browser/chromeos/input_method/xkeyboard.h

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_CHROMEOS_INPUT_METHOD_XKEYBOARD_H_
 #define CHROME_BROWSER_CHROMEOS_INPUT_METHOD_XKEYBOARD_H_
 #pragma once
 
 #include <map>
 #include <string>
@@ skipping 28 matching lines @@
   }
   ModifierKey original;      // Replace the key with
   ModifierKey replacement;   // this key.
 };
 typedef std::vector<ModifierKeyPair> ModifierMap;
 
 // Sets the current keyboard layout to |layout_name|. This function does not
 // 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.
 bool RemapModifierKeys(const ModifierMap& modifier_map);
 
 // Turns on and off the auto-repeat of the keyboard. Returns true on success.
 bool SetAutoRepeatEnabled(bool enabled);
 
 // Sets the auto-repeat rate of the keyboard, initial delay in ms, and repeat
 // interval in ms.  Returns true on success.
@@ skipping 39 matching lines @@
 void SetCapsLockEnabled(bool enabled);
 
 // Returns true if |key| is in |modifier_map| as replacement.
 bool ContainsModifierKeyAsReplacement(
     const ModifierMap& modifier_map, ModifierKey key);
 
 }  // namespace input_method
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_INPUT_METHOD_XKEYBOARD_H_