Move NetworkService mojom files to content/public/common.

content/public/common/url_loader_factory.mojom

 // 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.
 
 module content.mojom;
 
 import "mutable_network_traffic_annotation_tag.mojom";
 import "url_loader.mojom";
 
 [Native]
@@ skipping 16 matching lines @@
                        URLLoaderClient client,
                        MutableNetworkTrafficAnnotationTag traffic_annotation);
 
   // Loads the resource for the given |request| synchronously.
   // |request_id| is for compatibility with the existing Chrome IPC.
   [Sync] SyncLoad(int32 routing_id,
                   int32 request_id,
                   URLRequest request)
       => (URLSyncLoadResult result);
 };