feat: migrate protocol module to NetworkService (Part 1) (#17899)

atom/browser/net/atom_url_loader_factory.h

@@ -0,0 +1,42 @@
+// Copyright (c) 2019 GitHub, Inc.
+// Use of this source code is governed by the MIT license that can be
+// found in the LICENSE file.
+
+#ifndef ATOM_BROWSER_NET_ATOM_URL_LOADER_FACTORY_H_
+#define ATOM_BROWSER_NET_ATOM_URL_LOADER_FACTORY_H_
+
+#include "mojo/public/cpp/bindings/binding_set.h"
+#include "net/url_request/url_request_job_factory.h"
+#include "services/network/public/mojom/url_loader_factory.mojom.h"
+
+namespace atom {
+
+// Implementation of URLLoaderFactory.
+class AtomURLLoaderFactory : public network::mojom::URLLoaderFactory {
+ public:
+  AtomURLLoaderFactory();
+  ~AtomURLLoaderFactory() override;
+
+  // network::mojom::URLLoaderFactory:
+  void CreateLoaderAndStart(network::mojom::URLLoaderRequest loader,
+                            int32_t routing_id,
+                            int32_t request_id,
+                            uint32_t options,
+                            const network::ResourceRequest& request,
+                            network::mojom::URLLoaderClientPtr client,
+                            const net::MutableNetworkTrafficAnnotationTag&
+                                traffic_annotation) override;
+  void Clone(network::mojom::URLLoaderFactoryRequest request) override;
+
+ private:
+  // TODO(zcbenz): This comes from extensions/browser/extension_protocols.cc
+  // but I don't know what it actually does, find out the meanings of |Clone|
+  // and |bindings_| and add comments for them.
+  mojo::BindingSet<network::mojom::URLLoaderFactory> bindings_;
+
+  DISALLOW_COPY_AND_ASSIGN(AtomURLLoaderFactory);
+};
+
+}  // namespace atom
+
+#endif  // ATOM_BROWSER_NET_ATOM_URL_LOADER_FACTORY_H_