Update StickyKeys overlay to show or hide AltGr depending on the

chromeos/ime/input_methods.txt

Index: chromeos/ime/input_methods.txt
diff --git a/chromeos/ime/input_methods.txt b/chromeos/ime/input_methods.txt
index a570da72d1f208d1dd76214a6edd95641e2d5fb9..d053d12227450ad68d2e86b701cc69ecba13ba71 100644
--- a/chromeos/ime/input_methods.txt
+++ b/chromeos/ime/input_methods.txt
@@ -34,10 +34,12 @@
 #    * chrome/browser/resources/chromeos/keyboard_overlay_data.js
 #    * chrome/browser/ui/webui/chromeos/keyboard_overlay_ui.cc
 #
-#   If you add an XKB layout which depends on X11's Mod3Mask (e.g. Germany Neo2
-#   XKB layout), you should also update IsMod3UsedByCurrentInputMethod() method
-#   in chrome/browser/ui/ash/event_rewriter.cc. Otherwise, Mod3Mask might be
-#   removed unexpectedly by the rewriter.
+#   If you add an XKB layout which depends on AltGr or X11's Mod3Mask
+#   (e.g. Germany Neo2 XKB layout), you should also update kAltGrLayoutIds or
+#   kMod3LayoutIds in
+#   chrome/browser/chromeos/input_method/input_method_manager_impl.cc
+#   Otherwise, Mod3Mask might be removed unexpectedly by the rewriter, and
+#   sticky keys will not work.
 #
 
 # U.S. English