Update StickyKeys overlay to show or hide AltGr depending on the

chromeos/ime/xkeyboard.h

 // Copyright 2013 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 CHROMEOS_IME_XKEYBOARD_H_
 #define CHROMEOS_IME_XKEYBOARD_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 52 matching lines @@
   virtual void DisableNumLock() = 0;
 
   // Sets the caps lock status to |enable_caps_lock|. Do not call the function
   // from non-UI threads.
   virtual void SetCapsLockEnabled(bool enable_caps_lock) = 0;
 
   // Returns true if caps lock is enabled. Do not call the function from non-UI
   // threads.
   virtual bool CapsLockIsEnabled() = 0;
 
+  // Returns true if the current layout supports ISO Level 5 shift.
+  virtual bool IsISOLevel5ShiftAvailable() const = 0;
+
+  // Returns true if the current layout supports alt gr.
+  virtual bool IsAltGrAvailable() const = 0;
+
   // Turns on and off the auto-repeat of the keyboard. Returns true on success.
   // Do not call the function from non-UI threads.
   virtual bool SetAutoRepeatEnabled(bool enabled) = 0;
 
   // Sets the auto-repeat rate of the keyboard, initial delay in ms, and repeat
   // interval in ms.  Returns true on success. Do not call the function from
   // non-UI threads.
   virtual bool SetAutoRepeatRate(const AutoRepeatRate& rate) = 0;
 
   // Returns true if auto repeat is enabled. This function is protected: for
@@ skipping 11 matching lines @@
 
   // Note: At this moment, classes other than InputMethodManager should not
   // instantiate the XKeyboard class.
   static XKeyboard* Create();
 };
 
 }  // namespace input_method
 }  // namespace chromeos
 
 #endif  // CHROMEOS_IME_XKEYBOARD_H_