Bug 1187649 - Free constructed widget path in nsLookAndFeel on GTK. r=karlt

widget/gtk/mozgtk/mozgtk.c

@@ -546,6 +546,7 @@ STUB(gtk_tree_view_column_get_button)
 STUB(gtk_widget_get_preferred_size)
 STUB(gtk_widget_get_style_context)
 STUB(gtk_widget_path_append_type)
+STUB(gtk_widget_path_free)
 STUB(gtk_widget_path_new)
 STUB(gtk_widget_set_visual)
 STUB(gtk_app_chooser_dialog_new_for_content_type)

widget/gtk/nsLookAndFeel.cpp

@@ -1187,6 +1187,8 @@ nsLookAndFeel::Init()
     style = gtk_widget_get_style_context(frame);
     gtk_style_context_get_border_color(style, GTK_STATE_FLAG_NORMAL, &color);
     sFrameInnerDarkBorder = sFrameOuterLightBorder = GDK_RGBA_TO_NS_RGBA(color);
+
+    gtk_widget_path_free(path);
 #endif
     // Some themes have a unified menu bar, and support window dragging on it
     gboolean supports_menubar_drag = FALSE;