MD Settings: Use FireWebUIListener() helper wherever possible.

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

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #if defined(GOOGLE_CHROME_BUILD) && !defined(OS_CHROMEOS)
 
 #include "chrome/browser/ui/webui/settings/metrics_reporting_handler.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 78 matching lines @@
                                               const base::Value* current) {
   SendMetricsReportingChange();
 }
 
 void MetricsReportingHandler::OnPrefChanged(const std::string& pref_name) {
   DCHECK_EQ(metrics::prefs::kMetricsReportingEnabled, pref_name);
   SendMetricsReportingChange();
 }
 
 void MetricsReportingHandler::SendMetricsReportingChange() {
-  CallJavascriptFunction("cr.webUIListenerCallback",
-                         base::Value("metrics-reporting-change"),
-                         *CreateMetricsReportingDict());
+  FireWebUIListener("metrics-reporting-change", *CreateMetricsReportingDict());
 }
 
 }  // namespace settings
 
 #endif  // defined(GOOGLE_CHROME_BUILD) && !defined(OS_CHROMEOS)