Revert "[WIP] refactor: (Part I) make the ownership of URLRequestContextGetter more clear (#13956)"

This reverts commit 1c0bb06d4a.

atom/browser/net/http_protocol_handler.cc

@@ -0,0 +1,22 @@
+// Copyright (c) 2015 GitHub, Inc.
+// Use of this source code is governed by the MIT license that can be
+// found in the LICENSE file.
+
+#include "atom/browser/net/http_protocol_handler.h"
+
+#include "net/url_request/url_request_http_job.h"
+
+namespace atom {
+
+HttpProtocolHandler::HttpProtocolHandler(const std::string& scheme)
+    : scheme_(scheme) {}
+
+HttpProtocolHandler::~HttpProtocolHandler() {}
+
+net::URLRequestJob* HttpProtocolHandler::MaybeCreateJob(
+    net::URLRequest* request,
+    net::NetworkDelegate* network_delegate) const {
+  return net::URLRequestHttpJob::Factory(request, network_delegate, scheme_);
+}
+
+}  // namespace atom