Update StickyKeys overlay to show or hide AltGr depending on the

ash/sticky_keys/sticky_keys_controller.cc

 // 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.
 
 #include "ash/sticky_keys/sticky_keys_controller.h"
 
 #if defined(USE_X11)
 #include <X11/extensions/XInput2.h>
 #include <X11/Xlib.h>
 #undef RootWindow
@@ skipping 79 matching lines @@
       target->GetHost()->event_processor()->OnEventFromSource(event);
   if (details.dispatcher_destroyed)
     return;
 }
 
 }  // namespace
 
 ///////////////////////////////////////////////////////////////////////////////
 //  StickyKeys
 StickyKeysController::StickyKeysController()
-    : enabled_(false) {
+    : enabled_(false),
+      mod3_enabled_(false),
+      altgr_enabled_(false) {
 }
 
 StickyKeysController::~StickyKeysController() {
 }
 
 void StickyKeysController::Enable(bool enabled) {
   if (enabled_ != enabled) {
     enabled_ = enabled;
 
     // Reset key handlers when activating sticky keys to ensure all
     // the handlers' states are reset.
     if (enabled_) {
       shift_sticky_key_.reset(
           new StickyKeysHandler(ui::EF_SHIFT_DOWN,
                                 new StickyKeysHandlerDelegateImpl()));
       alt_sticky_key_.reset(
           new StickyKeysHandler(ui::EF_ALT_DOWN,
                                 new StickyKeysHandlerDelegateImpl()));
       altgr_sticky_key_.reset(
           new StickyKeysHandler(ui::EF_ALTGR_DOWN,
                                 new StickyKeysHandlerDelegateImpl()));
       ctrl_sticky_key_.reset(
           new StickyKeysHandler(ui::EF_CONTROL_DOWN,
                                 new StickyKeysHandlerDelegateImpl()));
 
       overlay_.reset(new StickyKeysOverlay());
-    } else if (overlay_.get()) {
+      overlay_->SetModifierVisible(ui::EF_ALTGR_DOWN, altgr_enabled_);
+    } else if (overlay_) {
       overlay_->Show(false);
     }
   }
 }
 
+void StickyKeysController::SetModifiersEnabled(bool mod3_enabled,
+                                               bool altgr_enabled) {
+  mod3_enabled_ = mod3_enabled;
+  altgr_enabled_ = altgr_enabled;
+  if (overlay_)
+    overlay_->SetModifierVisible(ui::EF_ALTGR_DOWN, altgr_enabled_);
+}
+
 bool StickyKeysController::HandleKeyEvent(ui::KeyEvent* event) {
   return shift_sticky_key_->HandleKeyEvent(event) ||
       alt_sticky_key_->HandleKeyEvent(event) ||
       altgr_sticky_key_->HandleKeyEvent(event) ||
       ctrl_sticky_key_->HandleKeyEvent(event);
 }
 
 bool StickyKeysController::HandleMouseEvent(ui::MouseEvent* event) {
   return shift_sticky_key_->HandleMouseEvent(event) ||
       alt_sticky_key_->HandleMouseEvent(event) ||
@@ skipping 365 matching lines @@
           &xievent->mods.effective));
     }
   }
 #elif defined(USE_OZONE)
   NOTIMPLEMENTED() << "Modifier key is not handled";
 #endif
   event->set_flags(event->flags() | modifier_flag_);
 }
 
 }  // namespace ash