DNS: Per-network-type and Finch-variable timeouts

net/dns/dns_config_service.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.
 
 #ifndef NET_DNS_DNS_CONFIG_SERVICE_H_
 #define NET_DNS_DNS_CONFIG_SERVICE_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 12 matching lines @@
 #include "net/dns/dns_hosts.h"
 
 namespace base {
 class Value;
 }
 
 namespace net {
 
 class IPAddress;
 
-// Always use 1 second timeout (followed by binary exponential backoff).
-// TODO(szym): Remove code which reads timeout from system.
-const unsigned kDnsTimeoutSeconds = 1;
+// Default to 1 second timeout (before exponential backoff).
+const int64_t kDnsDefaultTimeoutMs = 1000;
 
 // Classifies nameserver address lists for histograms.
 class NET_EXPORT_PRIVATE NameServerClassifier {
  public:
   // This is used in a histogram (AsyncDNS.NameServersType); add new entries
   // right before MAX_VALUE.
   enum NameServersType {
     NAME_SERVERS_TYPE_NONE,
     NAME_SERVERS_TYPE_GOOGLE_PUBLIC_DNS,
     NAME_SERVERS_TYPE_PRIVATE,
@@ skipping 163 matching lines @@
   base::OneShotTimer timer_;
 
   NameServerClassifier classifier_;
 
   DISALLOW_COPY_AND_ASSIGN(DnsConfigService);
 };
 
 }  // namespace net
 
 #endif  // NET_DNS_DNS_CONFIG_SERVICE_H_