Enable keyboard accelerators while a menu is open

ui/views/views_delegate.cc

Index: ui/views/views_delegate.cc
diff --git a/ui/views/views_delegate.cc b/ui/views/views_delegate.cc
index a676ae16610dc50286b5074f65c1c815ded22f6d..30d852527b93cd3f2d0abb714e527908641cc4ea 100644
--- a/ui/views/views_delegate.cc
+++ b/ui/views/views_delegate.cc
@@ -54,6 +54,12 @@ void ViewsDelegate::NotifyMenuItemFocused(const base::string16& menu_name,
                                           bool has_submenu) {
 }
 
+ViewsDelegate::ProcessMenuAcceleratorResult
+ViewsDelegate::ProcessAcceleratorWhileMenuShowing(
+    const ui::Accelerator& accelerator) {
+  return ProcessMenuAcceleratorResult::LEAVE_MENU_OPEN;
+}
+
 #if defined(OS_WIN)
 HICON ViewsDelegate::GetDefaultWindowIcon() const {
   return nullptr;