[gtk] cssimageicontheme: Use gtk_css_parser_consume_function()

[Benjamin Otte <otte src gnome org>]

commit 3597f7e8b100d0ed9d131c022b316b5f33165fe5
Author: Benjamin Otte <otte redhat com>
Date:   Mon Mar 25 04:11:08 2019 +0100

    cssimageicontheme: Use gtk_css_parser_consume_function()

 gtk/gtkcssimageicontheme.c | 29 +++++++++++++++--------------
 1 file changed, 15 insertions(+), 14 deletions(-)
---
diff --git a/gtk/gtkcssimageicontheme.c b/gtk/gtkcssimageicontheme.c
index d481659a4c..ee0dee9afe 100644
--- a/gtk/gtkcssimageicontheme.c
+++ b/gtk/gtkcssimageicontheme.c
@@ -126,30 +126,31 @@ gtk_css_image_icon_theme_snapshot (GtkCssImage *image,
     gtk_snapshot_pop (snapshot);
 }
 
+static guint
+gtk_css_image_icon_theme_parse_arg (GtkCssParser *parser,
+                                    guint         arg,
+                                    gpointer      data)
+{
+  GtkCssImageIconTheme *icon_theme = data;
+
+  icon_theme->name = _gtk_css_parser_read_string (parser);
+  if (icon_theme->name == NULL)
+    return 0;
+
+  return 1;
+}
 
 static gboolean
 gtk_css_image_icon_theme_parse (GtkCssImage  *image,
                                 GtkCssParser *parser)
 {
-  GtkCssImageIconTheme *icon_theme = GTK_CSS_IMAGE_ICON_THEME (image);
-
-  if (!_gtk_css_parser_try (parser, "-gtk-icontheme(", TRUE))
+  if (!gtk_css_parser_has_function (parser, "-gtk-icontheme"))
     {
       _gtk_css_parser_error (parser, "Expected '-gtk-icontheme('");
       return FALSE;
     }
 
-  icon_theme->name = _gtk_css_parser_read_string (parser);
-  if (icon_theme->name == NULL)
-    return FALSE;
-
-  if (!_gtk_css_parser_try (parser, ")", TRUE))
-    {
-      _gtk_css_parser_error (parser, "Missing closing bracket at end of '-gtk-icontheme'");
-      return FALSE;
-    }
-
-  return TRUE;
+  return gtk_css_parser_consume_function (parser, 1, 1, gtk_css_image_icon_theme_parse_arg, image);
 }
 
 static void