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

chrome/browser/ui/ash/chrome_shell_delegate.cc

Index: chrome/browser/ui/ash/chrome_shell_delegate.cc
diff --git a/chrome/browser/ui/ash/chrome_shell_delegate.cc b/chrome/browser/ui/ash/chrome_shell_delegate.cc
index ec12655a2494b0b90fcb296d08467cd85424f1cc..6c555a6fa53750688036a9901547a151ba08aadb 100644
--- a/chrome/browser/ui/ash/chrome_shell_delegate.cc
+++ b/chrome/browser/ui/ash/chrome_shell_delegate.cc
@@ -5,6 +5,7 @@
 #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"
 #include "ash/wm/window_util.h"
@@ -340,6 +341,44 @@ bool ChromeShellDelegate::IsSpokenFeedbackEnabled() const {
 #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_OFF;
+#endif
+}
+
+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;
+#else
+  return false;
+#endif
+}
+
 app_list::AppListViewDelegate*
     ChromeShellDelegate::CreateAppListViewDelegate() {
   DCHECK(ash::Shell::HasInstance());