Views a11y: Obey DialogDelegate::GetAccessibleWindowRole() rather than making a dialog-within-a-dia…

ui/views/bubble/bubble_dialog_delegate.cc

Index: ui/views/bubble/bubble_dialog_delegate.cc
diff --git a/ui/views/bubble/bubble_dialog_delegate.cc b/ui/views/bubble/bubble_dialog_delegate.cc
index 8ce99c3368fe05d20bc4302ac2b816404c66d2cb..b335b5bfc5d30afb3468940bb64d092fa9c0cbf1 100644
--- a/ui/views/bubble/bubble_dialog_delegate.cc
+++ b/ui/views/bubble/bubble_dialog_delegate.cc
@@ -310,10 +310,8 @@ void BubbleDialogDelegateView::HandleVisibilityChanged(Widget* widget,
   // than just its title and initially focused view.  See
   // http://crbug.com/474622 for details.
   if (widget == GetWidget() && visible) {
-    ui::AXNodeData node_data;
-    GetAccessibleNodeData(&node_data);
-    if (node_data.role == ui::AX_ROLE_ALERT_DIALOG)
-      NotifyAccessibilityEvent(ui::AX_EVENT_ALERT, true);
+    if (GetAccessibleWindowRole() == ui::AX_ROLE_ALERT_DIALOG)
+      widget->GetRootView()->NotifyAccessibilityEvent(ui::AX_EVENT_ALERT, true);
   }
 }