Update StickyKeys overlay to show or hide AltGr depending on the

ash/sticky_keys/sticky_keys_controller.h

Index: ash/sticky_keys/sticky_keys_controller.h
diff --git a/ash/sticky_keys/sticky_keys_controller.h b/ash/sticky_keys/sticky_keys_controller.h
index 018d4f5c8a494c72049b89c0ca134706c2b98bf9..792f2c58b0b32dbba3dc133f0ab8ee987ae14400 100644
--- a/ash/sticky_keys/sticky_keys_controller.h
+++ b/ash/sticky_keys/sticky_keys_controller.h
@@ -67,6 +67,8 @@ class ASH_EXPORT StickyKeysController : public ui::EventHandler {
   // Activate sticky keys to intercept and modify incoming events.
   void Enable(bool enabled);
 
+  void SetModifiersEnabled(bool mod3_enabled, bool altgr_enabled);
+
   // Overridden from ui::EventHandler:
   virtual void OnKeyEvent(ui::KeyEvent* event) OVERRIDE;
   virtual void OnMouseEvent(ui::MouseEvent* event) OVERRIDE;
@@ -92,6 +94,12 @@ class ASH_EXPORT StickyKeysController : public ui::EventHandler {
   // Whether sticky keys is activated and modifying events.
   bool enabled_;
 
+  // Whether the current layout has a mod3 key.
+  bool mod3_enabled_;
+
+  // Whether the current layout has an altgr key.
+  bool altgr_enabled_;
+
   // Sticky key handlers.
   scoped_ptr<StickyKeysHandler> shift_sticky_key_;
   scoped_ptr<StickyKeysHandler> alt_sticky_key_;