Site Settings Desktop: Fix NOTREACHED when group name is unregistered.

chrome/browser/ui/webui/settings/site_settings_handler.cc

Index: chrome/browser/ui/webui/settings/site_settings_handler.cc
diff --git a/chrome/browser/ui/webui/settings/site_settings_handler.cc b/chrome/browser/ui/webui/settings/site_settings_handler.cc
index 4c64a0f5bc6b5aac3aa621e65930b7d59f18eb03..9ae8300cafb498099a19e404b7e704c5d247471a 100644
--- a/chrome/browser/ui/webui/settings/site_settings_handler.cc
+++ b/chrome/browser/ui/webui/settings/site_settings_handler.cc
@@ -103,6 +103,9 @@ void SiteSettingsHandler::OnContentSettingChanged(
     const ContentSettingsPattern& secondary_pattern,
     ContentSettingsType content_type,
     std::string resource_identifier) {
+  if (!site_settings::HasRegisteredGroupName(content_type))
+    return;
+
   if (primary_pattern.ToString().empty()) {
     CallJavascriptFunction(
         "cr.webUIListenerCallback",