Added DnsQuery class

net/base/net_error_list.h

 // Copyright (c) 2011 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.
 
 //
@@ skipping 213 matching lines @@
 // Possible causes for this include the user implicitly or explicitly
 // denying access to the private key, the private key may not be valid for
 // signing, the key may be relying on a cached handle which is no longer
 // valid, or the CSP won't allow arbitrary data to be signed.
 NET_ERROR(SSL_CLIENT_AUTH_SIGNATURE_FAILED, -141)
 
 // The message was too large for the transport.  (for example a UDP message
 // which exceeds size threshold).
 NET_ERROR(MSG_TOO_BIG, -142)
 
+// DNS resolver received a malformed response.
+NET_ERROR(DNS_MALFORMED_RESPONSE, -143)
+
+// DNS server requires TCP
+NET_ERROR(DNS_SERVER_REQUIRES_TCP, -144)
+
+// DNS server failed.  This error is returned for all of the following
+// error conditions:
+// 1 - Format error - The name server was unable to interpret the query.
+// 2 - Server failure - The name server was unable to process this query
+//     due to a problem with the name server.
+// 4 - Not Implemented - The name server does not support the requested
+//     kind of query.
+// 5 - Refused - The name server refuses to perform the specified
+//     operation for policy reasons.
+NET_ERROR(DNS_SERVER_FAILED, -145)
+
 // Certificate error codes
 //
 // The values of certificate error codes must be consecutive.
 
 // The server responded with a certificate whose common name did not match
 // the host name.  This could mean:
 //
 // 1. An attacker has redirected our traffic to his server and is
 //    presenting a certificate for which he knows the private key.
 //
@@ skipping 285 matching lines @@
 // Import failed - certificate already exists in database.
 // Note it's a little weird this is an error but reimporting a PKCS12 is ok
 // (no-op).  That's how Mozilla does it, though.
 NET_ERROR(IMPORT_CERT_ALREADY_EXISTS, -704)
 
 // CA import failed due to some other error.
 NET_ERROR(IMPORT_CA_CERT_FAILED, -705)
 
 // Server certificate import failed due to some internal error.
 NET_ERROR(IMPORT_SERVER_CERT_FAILED, -706)