Real (but naive) UDP socket sending.

chrome/browser/extensions/socket_api_constants.h

+// Copyright (c) 2011 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.
+
+#ifndef CHROME_BROWSER_EXTENSIONS_SOCKET_API_CONSTANTS_H_
+#define CHROME_BROWSER_EXTENSIONS_SOCKET_API_CONSTANTS_H_
+
+#include <string>
+
+#include "base/values.h"
+
+namespace extensions {
+
+namespace socket_api_constants {
+
+extern const char kBytesWrittenKey[];
+extern const char kSocketIdKey[];
+
+extern const char kUdpSocketType[];
+
+}  // namespace socket_api_constants
+
+}  // namespace extensions
+
+#endif  // CHROME_BROWSER_EXTENSIONS_SOCKET_API_CONSTANTS_H_