Implement parts of the Mojo TCP interfaces.

mojo/services/network/net_adapters.cc

Index: mojo/services/network/net_adapters.cc
diff --git a/mojo/services/network/net_adapters.cc b/mojo/services/network/net_adapters.cc
new file mode 100644
index 0000000000000000000000000000000000000000..63744ff0adb34eabec953123de2a4b9aed6b9eaa
--- /dev/null
+++ b/mojo/services/network/net_adapters.cc
@@ -0,0 +1,19 @@
+// Copyright 2014 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.
+
+#include "mojo/services/network/net_adapters.h"
+
+#include "net/base/net_errors.h"
+
+namespace mojo {
+
+NetworkErrorPtr MakeNetworkError(int error_code) {
+  NetworkErrorPtr error = NetworkError::New();
+  error->code = error_code;
+  if (error_code <= 0)
+    error->description = net::ErrorToString(error_code);
+  return error.Pass();
+}
+
+}  // namespace mojo