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

chrome/browser/ui/ash/chrome_shell_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/ui/ash/chrome_shell_delegate.h"
 
 #include "ash/launcher/launcher_types.h"
 #include "ash/magnifier/magnifier_constants.h"
 #include "ash/system/tray/system_tray_delegate.h"
 #include "ash/wm/stacking_controller.h"
@@ skipping 82 matching lines @@
       chrome::NOTIFICATION_SESSION_STARTED,
       content::NotificationService::AllSources());
 #endif
 }
 
 ChromeShellDelegate::~ChromeShellDelegate() {
   if (instance_ == this)
     instance_ = NULL;
 }
 
-bool ChromeShellDelegate::IsUserLoggedIn() {
+bool ChromeShellDelegate::IsUserLoggedIn() const {
 #if defined(OS_CHROMEOS)
   // When running a Chrome OS build outside of a device (i.e. on a developer's
   // workstation) and not running as login-manager, pretend like we're always
   // logged in.
   if (!base::chromeos::IsRunningOnChromeOS() &&
       !CommandLine::ForCurrentProcess()->HasSwitch(switches::kLoginManager)) {
     return true;
   }
 
   return chromeos::UserManager::Get()->IsUserLoggedIn();
@@ skipping 251 matching lines @@
 }
 
 void ChromeShellDelegate::SetMagnifier(ash::MagnifierType type) {
 #if defined(OS_CHROMEOS)
   chromeos::accessibility::SetMagnifier(type);
 #endif
 }
 
 bool ChromeShellDelegate::ShouldAlwaysShowAccessibilityMenu() const {
 #if defined(OS_CHROMEOS)
-  // TODO(yoshiki): Add the checkbox on chrome://settings. crbug.com/158287
-  return false;
+  if (!IsUserLoggedIn())
+    return true;
+
+  Profile* profile = ProfileManager::GetDefaultProfile();
+  if (!profile)
+    return false;
+
+  PrefService* user_pref_service = profile->GetPrefs();
+  return user_pref_service &&
+      user_pref_service->GetBoolean(prefs::kShouldAlwaysShowAccessibilityMenu);
 #else
   return false;
 #endif
 }
 
 app_list::AppListViewDelegate*
     ChromeShellDelegate::CreateAppListViewDelegate() {
   DCHECK(ash::Shell::HasInstance());
   // Shell will own the created delegate, and the delegate will own
   // the controller.
@@ skipping 172 matching lines @@
       ash::Shell::GetInstance()->ShowLauncher();
       break;
     default:
       NOTREACHED() << "Unexpected notification " << type;
   }
 #else
   // MSVC++ warns about switch statements without any cases.
   NOTREACHED() << "Unexpected notification " << type;
 #endif
 }