Moved XMPP notifier library from chrome/browser/sync to chrome/common....

chrome/browser/sync/notifier/base/nethelpers.h

-// Copyright (c) 2009 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_SYNC_NOTIFIER_BASE_NETHELPERS_H_
-#define CHROME_BROWSER_SYNC_NOTIFIER_BASE_NETHELPERS_H_
-
-#include "base/basictypes.h"
-
-#if defined(OS_POSIX)
-#include <cstddef>
-#include <netdb.h>
-#elif defined(OS_WIN)
-#include <winsock2.h>
-#endif
-
-namespace notifier {
-
-hostent* SafeGetHostByName(const char* hostname, hostent* host,
-                           char* buffer, size_t buffer_len,
-                           int* herrno);
-
-void FreeHostEnt(hostent* host);
-
-}  // namespace notifier
-
-#endif  // CHROME_BROWSER_SYNC_NOTIFIER_BASE_NETHELPERS_H_