Don't emit ::query-tooltip by name

This signal is emitted quite a bit, and we can easily avoid it.

gtk/gtktooltip.c

@@ -824,12 +824,7 @@ gtk_tooltip_run_requery (GtkWidget  **widget,
       has_tooltip = gtk_widget_get_has_tooltip (*widget);
 
       if (has_tooltip)
-	g_signal_emit_by_name (*widget,
-			       "query-tooltip",
-			       *x, *y,
-			       tooltip->keyboard_mode_enabled,
-			       tooltip,
-			       &return_value);
+        return_value = gtk_widget_query_tooltip (widget, *x, *y, tooltip->keyboard_mode_enabled, tooltip);
 
       if (!return_value)
         {

gtk/gtkwidget.c

@@ -8093,6 +8093,25 @@ gtk_widget_real_query_tooltip (GtkWidget  *widget,
   return FALSE;
 }
 
+gboolean
+gtk_widget_query_tooltip (GtkWidget  *widget,
+                          gint        x,
+                          gint        y,
+                          gboolean    keyboard_mode,
+                          GtkTooltip *tooltip)
+{
+  gboolean retval = FALSE;
+
+  g_signal_emit (widget,
+                 widget_signals[QUERY_TOOLTIP],
+                 x, y,
+                 keyboard_mode,
+                 tooltip,
+                 &retval);
+
+  return retval;
+}
+
 static void
 gtk_widget_real_state_flags_changed (GtkWidget     *widget,
                                      GtkStateFlags  old_state)

gtk/gtkwidgetprivate.h

@@ -297,6 +297,12 @@ gboolean          gtk_widget_has_size_request              (GtkWidget *widget);
 
 void              gtk_widget_reset_controllers             (GtkWidget *widget);
 
+gboolean          gtk_widget_query_tooltip                 (GtkWidget  *widget,
+                                                            gint        x,
+                                                            gint        y,
+                                                            gboolean    keyboard_mode,
+                                                            GtkTooltip *tooltip);
+
 /* inline getters */
 
 static inline gboolean