SetBackArrowVisible  170 ui/message_center/views/message_center_button_bar.cc   SetBackArrowVisible(settings_initially_visible);
SetBackArrowVisible   44 ui/message_center/views/message_center_button_bar.h   void SetBackArrowVisible(bool visible);
SetBackArrowVisible  679 ui/message_center/views/message_center_view.cc   button_bar_->SetBackArrowVisible(visible);