Adding ERR_SOCKET_IS_CONNECTED.

net/base/net_error_list.h

 // Copyright (c) 2012 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.
 
 // This file intentionally does not have header guards, it's included
 // inside a macro to generate enum.
 
 // This file contains the list of network errors.
 
 //
 // Ranges:
 //     0- 99 System related errors
 //   100-199 Connection related errors

[wtc, 2013/04/30 23:41:59]

It seems that the IS_CONNECTED error could also be added
to the 100-199 range (connection/socket related errors).

Since the NOT_CONNECTED error was already added to the 0-99
range, I think it makes sense to do the same.

 //   200-299 Certificate errors
 //   300-399 HTTP errors
 //   400-499 Cache errors
 //   500-599 ?
 //   600-699 FTP errors
 //   700-799 Certificate manager errors
 //   800-899 DNS resolver errors
 
 // An asynchronous IO operation is not yet complete.  This usually does not
 // indicate a fatal error.  Typically this error will be generated as a
@@ skipping 60 matching lines @@
 // The client chose to block the request.
 NET_ERROR(BLOCKED_BY_CLIENT, -20)
 
 // The network changed.
 NET_ERROR(NETWORK_CHANGED, -21)
 
 // The request was blocked by the URL blacklist configured by the domain
 // administrator.
 NET_ERROR(BLOCKED_BY_ADMINISTRATOR, -22)
 
+// The socket is connected.

[wtc, 2013/04/30 23:41:59]

Add "already" before "connected".

[Bei Zhang, 2013/05/01 00:03:23]

Done.

+NET_ERROR(SOCKET_IS_CONNECTED, -23)
+
 // A connection was closed (corresponding to a TCP FIN).
 NET_ERROR(CONNECTION_CLOSED, -100)
 
 // A connection was reset (corresponding to a TCP RST).
 NET_ERROR(CONNECTION_RESET, -101)
 
 // A connection attempt was refused.
 NET_ERROR(CONNECTION_REFUSED, -102)
 
 // A connection timed out as a result of not receiving an ACK for data sent.
@@ skipping 557 matching lines @@
 NET_ERROR(DNS_TIMED_OUT, -803)
 
 // The entry was not found in cache, for cache-only lookups.
 NET_ERROR(DNS_CACHE_MISS, -804)
 
 // Suffix search list rules prevent resolution of the given host name.
 NET_ERROR(DNS_SEARCH_EMPTY, -805)
 
 // Failed to sort addresses according to RFC3484.
 NET_ERROR(DNS_SORT_ERROR, -806)