Move NetworkService mojom files to content/public/common.

content/public/common/network_service.mojom

 // 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.
 
 module content.mojom;
 
 import "mojo/common/file_path.mojom";
 import "url_loader.mojom";
 import "url_loader_factory.mojom";
 import "url/mojo/url.mojom";
@@ skipping 19 matching lines @@
   HandleViewCacheRequest(url.mojom.Url url,
                          URLLoaderClient client);
 };
 
 // Browser interface to the network service.
 interface NetworkService {
   // Creates a new network context with the given parameters.
   CreateNetworkContext(NetworkContext& context,
                        NetworkContextParams params);
 };