revert the following stupidity

commit e93121e97478a41d529c8586a48b4ec34173f79a
Author: Tom Anderson <thomasanderson@chromium.org>
Date:   Mon Jan 5 17:42:17 2026 -0800

Index: ui/gtk/select_file_dialog_linux_gtk.cc
--- ui/gtk/select_file_dialog_linux_gtk.cc.orig
+++ ui/gtk/select_file_dialog_linux_gtk.cc
@@ -50,7 +50,8 @@ namespace {
 // GTK_RESPONSE_ACCEPT as the default button, which should be avoided to prevent
 // an exploit where the user is instructed to hold Enter before the dialog
 // appears.
-constexpr GtkResponseType kResponseTypeAccept = static_cast<GtkResponseType>(0);
+// My god ^^^^^ WTF
+constexpr GtkResponseType kResponseTypeAccept = static_cast<GtkResponseType>(GTK_RESPONSE_ACCEPT);
 
 // TODO(crbug.com/41469294): These getters will be unnecessary after
 // migrating to GtkFileChooserNative.
