Break out balsa and epoll_server from net/tools/flip_server.

net/tools/flip_server/split.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 NET_TOOLS_FLIP_SERVER_SPLIT_H_
-#define NET_TOOLS_FLIP_SERVER_SPLIT_H_
-
-#include <vector>
-#include "base/strings/string_piece.h"
-
-namespace net {
-
-// Yea, this could be done with less code duplication using
-// template magic, I know.
-void SplitStringPieceToVector(const base::StringPiece& full,
-                              const char* delim,
-                              std::vector<base::StringPiece>* vec,
-                              bool omit_empty_strings);
-
-}  // namespace net
-
-#endif  // NET_TOOLS_FLIP_SERVER_SPLIT_H_
-