Use OnceCallback on Mojo interfaces in //chrome/common/media_router

chrome/utility/media_router/dial_device_description_parser_impl.h

 // 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.
 
 #ifndef CHROME_UTILITY_MEDIA_ROUTER_DIAL_DEVICE_DESCRIPTION_PARSER_IMPL_H_
 #define CHROME_UTILITY_MEDIA_ROUTER_DIAL_DEVICE_DESCRIPTION_PARSER_IMPL_H_
 
 #include "base/macros.h"
 #include "chrome/common/media_router/mojo/dial_device_description_parser.mojom.h"
 #include "services/service_manager/public/cpp/bind_source_info.h"
@@ skipping 11 matching lines @@
 
   static void Create(const service_manager::BindSourceInfo& source_info,
                      chrome::mojom::DialDeviceDescriptionParserRequest request);
 
  private:
   friend class DialDeviceDescriptionParserImplTest;
 
   // extensions::mojom::DialDeviceDescriptionParser:
   void ParseDialDeviceDescription(
       const std::string& device_description_xml_data,
-      const ParseDialDeviceDescriptionCallback& callback) override;
+      ParseDialDeviceDescriptionCallback callback) override;
 
   // Processes the result of getting device description. Returns valid
   // DialDeviceDescriptionPtr if processing succeeds; otherwise returns nullptr.
   // |xml|: The device description xml text.
   chrome::mojom::DialDeviceDescriptionPtr Parse(const std::string& xml);
 
   base::ThreadChecker thread_checker_;
 
   DISALLOW_COPY_AND_ASSIGN(DialDeviceDescriptionParserImpl);
 };
 
 }  // namespace media_router
 
 #endif  // CHROME_UTILITY_MEDIA_ROUTER_DIAL_DEVICE_DESCRIPTION_PARSER_IMPL_H_