Update StickyKeys overlay to show or hide AltGr depending on the

chrome/browser/chromeos/accessibility/accessibility_manager.cc

 // Copyright (c) 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 "chrome/browser/chromeos/accessibility/accessibility_manager.h"
 
 #include "ash/audio/sounds.h"
 #include "ash/autoclick/autoclick_controller.h"
 #include "ash/high_contrast/high_contrast_controller.h"
 #include "ash/metrics/user_metrics_recorder.h"
@@ skipping 305 matching lines @@
                               chrome::NOTIFICATION_SESSION_STARTED,
                               content::NotificationService::AllSources());
   notification_registrar_.Add(this,
                               chrome::NOTIFICATION_PROFILE_DESTROYED,
                               content::NotificationService::AllSources());
   notification_registrar_.Add(this,
                               chrome::NOTIFICATION_SCREEN_LOCK_STATE_CHANGED,
                               content::NotificationService::AllSources());
 
   GetBrailleController()->AddObserver(this);
+  input_method::InputMethodManager::Get()->AddObserver(this);
 
   ui::ResourceBundle& bundle = ui::ResourceBundle::GetSharedInstance();
   media::SoundsManager* manager = media::SoundsManager::Get();
   manager->Initialize(SOUND_SHUTDOWN,
                       bundle.GetRawDataResource(IDR_SOUND_SHUTDOWN_WAV));
   manager->Initialize(
       SOUND_SPOKEN_FEEDBACK_ENABLED,
       bundle.GetRawDataResource(IDR_SOUND_SPOKEN_FEEDBACK_ENABLED_WAV));
   manager->Initialize(
       SOUND_SPOKEN_FEEDBACK_DISABLED,
       bundle.GetRawDataResource(IDR_SOUND_SPOKEN_FEEDBACK_DISABLED_WAV));
 }
 
 AccessibilityManager::~AccessibilityManager() {
   CHECK(this == g_accessibility_manager);
   AccessibilityStatusEventDetails details(
       ACCESSIBILITY_MANAGER_SHUTDOWN,
       false,
       ash::A11Y_NOTIFICATION_NONE);
   NotifyAccessibilityStatusChanged(details);
+  input_method::InputMethodManager::Get()->RemoveObserver(this);
 }
 
 bool AccessibilityManager::ShouldShowAccessibilityMenu() {
   // If any of the loaded profiles has an accessibility feature turned on - or
   // enforced to always show the menu - we return true to show the menu.
   std::vector<Profile*> profiles =
       g_browser_process->profile_manager()->GetLoadedProfiles();
   for (std::vector<Profile*>::iterator it = profiles.begin();
        it != profiles.end();
        ++it) {
@@ skipping 390 matching lines @@
           base::Unretained(GetBrailleController())),
       base::Bind(&AccessibilityManager::ReceiveBrailleDisplayState,
                  weak_ptr_factory_.GetWeakPtr()));
 }
 
 void AccessibilityManager::ReceiveBrailleDisplayState(
     scoped_ptr<extensions::api::braille_display_private::DisplayState> state) {
   OnDisplayStateChanged(*state);
 }
 
+// Overridden from InputMethodManager::Observer.
+void AccessibilityManager::InputMethodChanged(
+    input_method::InputMethodManager* manager,
+    bool show_message) {
+#if defined(USE_ASH)
+  // Sticky keys is implemented only in ash.
+  ash::Shell::GetInstance()->sticky_keys_controller()->SetModifiersEnabled(
+      manager->IsMod3UsedByCurrentInputMethod(),
+      manager->IsAltGrUsedByCurrentInputMethod());
+#endif
+}
 
 void AccessibilityManager::SetProfile(Profile* profile) {
   pref_change_registrar_.reset();
   local_state_pref_change_registrar_.reset();
 
   if (profile) {
     // TODO(yoshiki): Move following code to PrefHandler.
     pref_change_registrar_.reset(new PrefChangeRegistrar);
     pref_change_registrar_->Init(profile->GetPrefs());
     pref_change_registrar_->Add(
@@ skipping 215 matching lines @@
       chrome_vox_loaded_on_lock_screen_;
 }
 
 void AccessibilityManager::PostUnloadChromeVox(Profile* profile) {
   // Do any teardown work needed immediately after ChromeVox actually unloads.
   if (system_sounds_enabled_)
     ash::PlaySystemSoundAlways(SOUND_SPOKEN_FEEDBACK_DISABLED);
 }
 
 }  // namespace chromeos