[Ash] Remove HoverHighlightView::AddLabelDeprecated()

ash/system/tray/tray_popup_utils.h

Index: ash/system/tray/tray_popup_utils.h
diff --git a/ash/system/tray/tray_popup_utils.h b/ash/system/tray/tray_popup_utils.h
index a8390617346abd5b25921cf8d6c5338143c7e852..d674034c8b8e9384d5e47dcfcc3440aa56f77191 100644
--- a/ash/system/tray/tray_popup_utils.h
+++ b/ash/system/tray/tray_popup_utils.h
@@ -62,6 +62,13 @@ class TrayPopupUtils {
   // flexible width.
   static TriView* CreateSubHeaderRowView();
 
+  // Creates a view containing only a label (corresponding to |message_id|),
+  // which is to be inserted as a non-targetable row within a system menu
+  // detailed view (e.g., the "Scanning for devices..." message that can appear
+  // at the top of the Bluetooth detailed view). The caller takes over ownership
+  // of the created view.
+  static views::View* CreateInfoLabelRowView(int message_id);
+
   // Creates a container view to be used by system menu rows that want to embed
   // a targetable area within one (or more) of the containers OR by any row
   // that requires a non-default layout within the container views. The returned