A11y: Add the option to always show the a11y tray menu regardless of the state of a11y features

chrome/browser/chromeos/system/ash_system_tray_delegate.cc

 // Copyright (c) 2012 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/system/ash_system_tray_delegate.h"
 
 #include "ash/shell.h"
 #include "ash/shell_window_ids.h"
 #include "ash/system/audio/audio_observer.h"
 #include "ash/system/bluetooth/bluetooth_observer.h"
@@ skipping 764 matching lines @@
         base::Bind(&SystemTrayDelegate::OnLanguageRemapSearchKeyToChanged,
                    base::Unretained(this)));
     pref_registrar_->Add(
         prefs::kShowLogoutButtonInTray,
         base::Bind(&SystemTrayDelegate::UpdateShowLogoutButtonInTray,
                    base::Unretained(this)));
     pref_registrar_->Add(
         prefs::kMagnifierType,
         base::Bind(&SystemTrayDelegate::OnAccessibilityModeChanged,
                    base::Unretained(this)));
+    pref_registrar_->Add(
+        prefs::kShouldAlwaysShowAccessibilityMenu,
+        base::Bind(&SystemTrayDelegate::OnAccessibilityModeChanged,
+                   base::Unretained(this)));
 
     UpdateClockType();
     UpdateShowLogoutButtonInTray();
     search_key_mapped_to_ =
         profile->GetPrefs()->GetInteger(prefs::kLanguageRemapSearchKeyTo);
   }
 
   void ObserveGDataUpdates() {
     DriveSystemService* system_service = FindDriveSystemService();
     if (!system_service)
@@ skipping 490 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(SystemTrayDelegate);
 };
 
 }  // namespace
 
 ash::SystemTrayDelegate* CreateSystemTrayDelegate() {
   return new chromeos::SystemTrayDelegate();
 }
 
 }  // namespace chromeos