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

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 1d569c8c0cfe6bd46635a9d2ba41402d9a0c730c..1edc9d1968bf4efcf32668fd7c043d8fbb75436f 100644
--- a/ash/shell/shell_delegate_impl.cc
+++ b/ash/shell/shell_delegate_impl.cc
@@ -36,19 +36,19 @@ void ShellDelegateImpl::SetWatcher(WindowWatcher* watcher) {
     launcher_delegate_->set_watcher(watcher);
 }
 
-bool ShellDelegateImpl::IsUserLoggedIn() {
+bool ShellDelegateImpl::IsUserLoggedIn() const {
   return true;
 }
 
-bool ShellDelegateImpl::IsSessionStarted() {
+bool ShellDelegateImpl::IsSessionStarted() const {
   return true;
 }
 
-bool ShellDelegateImpl::IsFirstRunAfterBoot() {
+bool ShellDelegateImpl::IsFirstRunAfterBoot() const {
   return false;
 }
 
-bool ShellDelegateImpl::CanLockScreen() {
+bool ShellDelegateImpl::CanLockScreen() const {
   return true;
 }