Make http_server part of the sdk.

services/http_server/public/http_server_factory.mojom

-// Copyright 2015 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 http_server;
-
-import "mojo/services/network/public/interfaces/net_address.mojom";
-import "services/http_server/public/http_server.mojom";
-
-interface HttpServerFactory {
-  // Creates an http server running on the specified local network address.  If
-  // |local_address| is null, it will take the default value of 0.0.0.0 at a
-  // system-allocated port.
-  //
-  // Note that the port value of 0 means that the operating system will pick
-  // one of available ports. You can use HttpServer::GetPort() to retrieve the
-  // allocated port.
-  //
-  // Only one backing server will be created for each local network address. It
-  // will be shared among clients, if more than one client requests a server
-  // running on a particular network address.
-  //
-  // TODO(ppi): would it be better to create a server only for the first caller
-  // and require the access to it to be explicitly shared by the party that
-  // requests it first?
-  CreateHttpServer(HttpServer& server_request, mojo.NetAddress? local_address);
-};