A11y: Introduce High Contrast Mode and Screen Magnifier to ubar tray.

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/system/tray/system_tray_delegate.h"
 #include "ash/wm/stacking_controller.h"
 #include "ash/wm/window_util.h"
@@ skipping 322 matching lines @@
 }
 
 bool ChromeShellDelegate::IsSpokenFeedbackEnabled() const {
 #if defined(OS_CHROMEOS)
   return chromeos::accessibility::IsSpokenFeedbackEnabled();
 #else
   return false;
 #endif
 }
 
+bool ChromeShellDelegate::IsHighContrastEnabled() const {
+#if defined(OS_CHROMEOS)
+  return chromeos::accessibility::IsHighContrastEnabled();
+#else
+  return false;
+#endif
+}
+
+void ChromeShellDelegate::ToggleHighContrast() {
+#if defined(OS_CHROMEOS)
+  bool enabled = chromeos::accessibility::IsHighContrastEnabled();
+  chromeos::accessibility::EnableHighContrast(!enabled);
+#endif
+}
+
+ash::MagnifierType ChromeShellDelegate::GetMagnifierType() const {
+#if defined(OS_CHROMEOS)
+  return chromeos::accessibility::GetMagnifierType();
+#else
+  return ash::MAGNIFIER_NONE;
+#endif
+}
+
+void ChromeShellDelegate::SetScreenMagnifier(ash::MagnifierType type) {
+#if defined(OS_CHROMEOS)
+  chromeos::accessibility::SetScreenMagnifier(type);
+#endif
+}
+
+bool ChromeShellDelegate::ShouldAlwaysShowAccessibilityMenu() const {
+#if defined(OS_CHROMEOS)
+  // TODO(yoshiki): Add the checkbox on chrome://settings. crbug.com/158287
+  return false;
+#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.
   return new AppListViewDelegate(new AppListControllerDelegateAsh());
 }
 
 ash::LauncherDelegate* ChromeShellDelegate::CreateLauncherDelegate(
     ash::LauncherModel* model) {
@@ skipping 149 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
 }