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

net/tools/epoll_server/epoll_server.h

Index: net/tools/epoll_server/epoll_server.h
diff --git a/net/tools/flip_server/epoll_server.h b/net/tools/epoll_server/epoll_server.h
similarity index 99%
rename from net/tools/flip_server/epoll_server.h
rename to net/tools/epoll_server/epoll_server.h
index 2fb7c62089a10969743fe3212bfaf065fa74770b..19892b4c8814d6092ee69d2e384b23c61b827169 100644
--- a/net/tools/flip_server/epoll_server.h
+++ b/net/tools/epoll_server/epoll_server.h
@@ -2,15 +2,15 @@
 // 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_EPOLL_SERVER_H_
-#define NET_TOOLS_FLIP_SERVER_EPOLL_SERVER_H_
+#ifndef NET_TOOLS_EPOLL_SERVER_EPOLL_SERVER_H_
+#define NET_TOOLS_EPOLL_SERVER_EPOLL_SERVER_H_
 
 #include <fcntl.h>
 #include <sys/queue.h>
 #include <map>
+#include <set>
 #include <string>
 #include <utility>
-#include <set>
 #include <vector>
 
 // #define EPOLL_SERVER_EVENT_TRACING 1
@@ -1050,5 +1050,4 @@ class EpollAlarm : public EpollAlarmCallbackInterface {
 
 }  // namespace net
 
-#endif  // NET_TOOLS_FLIP_SERVER_EPOLL_SERVER_H_
-
+#endif  // NET_TOOLS_EPOLL_SERVER_EPOLL_SERVER_H_