Enable use_once_callback for //content/common/*.mojom

content/network/network_service_url_loader_factory_impl.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 "content/network/network_service_url_loader_factory_impl.h"
 
 #include "base/logging.h"
 #include "content/common/resource_request.h"
 #include "content/network/url_loader_impl.h"
 
@@ skipping 14 matching lines @@
     const ResourceRequest& url_request,
     mojom::URLLoaderClientPtr client) {
   new URLLoaderImpl(context_, std::move(request), options, url_request,
                     std::move(client));
 }
 
 void NetworkServiceURLLoaderFactoryImpl::SyncLoad(
     int32_t routing_id,
     int32_t request_id,
     const ResourceRequest& url_request,
-    const SyncLoadCallback& callback) {
+    SyncLoadCallback callback) {
   NOTIMPLEMENTED();
 
   SyncLoadResult result;
   result.error_code = net::ERR_NOT_IMPLEMENTED;
-  callback.Run(result);
+  std::move(callback).Run(result);
 }
 
 }  // namespace content