MD Settings: Use FireWebUIListener() helper wherever possible.

chrome/browser/ui/webui/settings/chromeos/device_power_handler.cc

 // Copyright 2017 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.
 
 #include "chrome/browser/ui/webui/settings/chromeos/device_power_handler.h"
 
 #include <memory>
 #include <utility>
 
 #include "ash/resources/grit/ash_resources.h"
@@ skipping 97 matching lines @@
     status_text = l10n_util::GetStringFUTF16(IDS_OPTIONS_BATTERY_STATUS_SHORT,
                                              base::IntToString16(percent));
   }
 
   base::DictionaryValue battery_dict;
   battery_dict.SetBoolean("charging", charging);
   battery_dict.SetBoolean("calculating", calculating);
   battery_dict.SetInteger("percent", percent);
   battery_dict.SetString("statusText", status_text);
 
-  CallJavascriptFunction("cr.webUIListenerCallback",
-                         base::Value("battery-status-changed"), battery_dict);
+  FireWebUIListener("battery-status-changed", battery_dict);
 }
 
 void PowerHandler::SendPowerSources() {
   base::ListValue sources_list;
   for (const auto& source : power_status_->GetPowerSources()) {
     std::unique_ptr<base::DictionaryValue> dict(new base::DictionaryValue());
     dict->SetString("id", source.id);
     dict->SetInteger("type", source.type);
     dict->SetString("description",
                     l10n_util::GetStringUTF16(source.description_id));
     sources_list.Append(std::move(dict));
   }
 
-  CallJavascriptFunction("cr.webUIListenerCallback",
-                         base::Value("power-sources-changed"), sources_list,
-                         base::Value(power_status_->GetCurrentPowerSourceID()),
-                         base::Value(power_status_->IsUsbChargerConnected()));
+  FireWebUIListener("power-sources-changed", sources_list,
+                    base::Value(power_status_->GetCurrentPowerSourceID()),
+                    base::Value(power_status_->IsUsbChargerConnected()));
 }
 
 }  // namespace settings
 }  // namespace chromeos