MD Settings: Use FireWebUIListener() helper wherever possible.

chrome/browser/ui/webui/settings/chromeos/cups_printers_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.
 
 #include "chrome/browser/ui/webui/settings/chromeos/cups_printers_handler.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 271 matching lines @@
       LOG(ERROR) << "Unrecoverable error.  Reboot required.";
       break;
   }
   CallJavascriptFunction(
       "cr.webUIListenerCallback", base::Value("on-add-cups-printer"),
       base::Value(result_code == chromeos::PrinterSetupResult::SUCCESS),
       base::Value(printer_name));
 }
 
 void CupsPrintersHandler::OnAddPrinterError() {
-  CallJavascriptFunction("cr.webUIListenerCallback",
-                         base::Value("on-add-cups-printer"), base::Value(false),
-                         base::Value(""));
+  FireWebUIListener("on-add-cups-printer", base::Value(false), base::Value(""));
 }
 
 void CupsPrintersHandler::HandleGetCupsPrinterManufacturers(
     const base::ListValue* args) {
   AllowJavascript();
   std::string js_callback;
   CHECK_EQ(1U, args->GetSize());
   CHECK(args->GetString(0, &js_callback));
   ppd_provider_->ResolveManufacturers(
       base::Bind(&CupsPrintersHandler::ResolveManufacturersDone,
@@ skipping 97 matching lines @@
 }
 
 void CupsPrintersHandler::OnPrintersFound(
     const std::vector<Printer>& printers) {
   std::unique_ptr<base::ListValue> printers_list =
       base::MakeUnique<base::ListValue>();
   for (const auto& printer : printers) {
     printers_list->Append(GetPrinterInfo(printer));
   }
 
-  CallJavascriptFunction("cr.webUIListenerCallback",
-                         base::Value("on-printer-discovered"), *printers_list);
+  FireWebUIListener("on-printer-discovered", *printers_list);
 }
 
 void CupsPrintersHandler::OnDiscoveryInitialScanDone() {
-  CallJavascriptFunction("cr.webUIListenerCallback",
-                         base::Value("on-printer-discovery-done"));
+  FireWebUIListener("on-printer-discovery-done");
 }
 
 }  // namespace settings
 }  // namespace chromeos