Slight code change to make some global variables const.

net/base/telnet_server.h

 // Copyright (c) 2006-2008 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_BASE_TELNET_SERVER_H_
 #define NET_BASE_TELNET_SERVER_H_
 
 #include "net/base/listen_socket.h"
 
 // Implements the telnet protocol on top of the raw socket interface.
 // DidRead calls to the delegate are buffered on a line by line basis.
 // (for now this means that basic line editing is handled in this object)
 class TelnetServer : public ListenSocket {
 public:
   static TelnetServer* Listen(std::string ip, int port,
                               ListenSocketDelegate *del);
   virtual ~TelnetServer();
 
 protected:
   void Listen() { ListenSocket::Listen(); }
   virtual void Read();
   virtual void Accept();
   virtual void SendInternal(const char* bytes, int len);
 
 private:
   enum TelnetInputState {
-    NOT_IN_IAC_OR_ESC_SEQUENCE,  // Currently not processing any IAC or ESC sequence.
-    EXPECTING_NEW_LINE,  // Received carriage return (CR) expecting new line (LF).
-    EXPECTING_COMMAND,  // Processing IAC expecting command.
-    EXPECTING_OPTION,  // Processing IAC expecting option.
-    SUBNEGOTIATION_EXPECTING_IAC,  // Inside subnegoation IAC,SE will end it.
-    SUBNEGOTIATION_EXPECTING_SE,  // Ending subnegoation expecting SE.
-    EXPECTING_FIRST_ESC_CHARACTER,  // Processing ESC sequence.
-    EXPECTING_SECOND_ESC_CHARACTER,  // Processing ESC sequence with two characters
-    EXPECTING_NUMBER_SEMICOLON_OR_END  // Processing "ESC [" sequence.
+    // Currently not processing any IAC or ESC sequence.
+    NOT_IN_IAC_OR_ESC_SEQUENCE,
+    // Received carriage return (CR) expecting new line (LF).
+    EXPECTING_NEW_LINE,
+    // Processing IAC expecting command.
+    EXPECTING_COMMAND,
+    // Processing IAC expecting option.
+    EXPECTING_OPTION,
+    // Inside subnegoation IAC,SE will end it.
+    SUBNEGOTIATION_EXPECTING_IAC,
+    // Ending subnegoation expecting SE.
+    SUBNEGOTIATION_EXPECTING_SE,
+    // Processing ESC sequence.
+    EXPECTING_FIRST_ESC_CHARACTER,
+    // Processing ESC sequence with two characters.
+    EXPECTING_SECOND_ESC_CHARACTER,
+    // Processing "ESC [" sequence.
+    EXPECTING_NUMBER_SEMICOLON_OR_END
   };
 
   TelnetServer(SOCKET s, ListenSocketDelegate* del);
 
   // telnet commands
   void SendIAC(int command, int option);
   void StateMachineStep(unsigned char c);
 
   TelnetInputState input_state_;
   int iac_command_;  // Last command read.
   int iac_option_;  // Last option read.
   std::string command_line_;
 
   DISALLOW_EVIL_CONSTRUCTORS(TelnetServer);
 };
 
 #endif // BASE_TELNET_SERVER_H_