Large Cursor: Add the toggle menuitem to a11y menu in uber tray

ash/shell/shell_delegate_impl.cc

Index: ash/shell/shell_delegate_impl.cc
diff --git a/ash/shell/shell_delegate_impl.cc b/ash/shell/shell_delegate_impl.cc
index cd9e5427f175f360797fa96f2a7e5934c20c8580..1fc782c22588d917a8719ce0acca258218ac2445 100644
--- a/ash/shell/shell_delegate_impl.cc
+++ b/ash/shell/shell_delegate_impl.cc
@@ -59,7 +59,8 @@ ShellDelegateImpl::ShellDelegateImpl()
       spoken_feedback_enabled_(false),
       high_contrast_enabled_(false),
       screen_magnifier_enabled_(false),
-      screen_magnifier_type_(kDefaultMagnifierType) {
+      screen_magnifier_type_(kDefaultMagnifierType),
+      large_cursor_enabled_(false) {
 }
 
 ShellDelegateImpl::~ShellDelegateImpl() {
@@ -170,6 +171,14 @@ MagnifierType ShellDelegateImpl::GetMagnifierType() const {
   return screen_magnifier_type_;
 }
 
+void ShellDelegateImpl::SetLargeCursorEnabled(bool enabled) {
+  large_cursor_enabled_ = enabled;
+}
+
+bool ShellDelegateImpl::IsLargeCursorEnabled() const {
+  return large_cursor_enabled_;
+}
+
 bool ShellDelegateImpl::ShouldAlwaysShowAccessibilityMenu() const {
   return false;
 }