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

net/dns/host_resolver_impl.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_HOST_RESOLVER_IMPL_H_
 #define NET_DNS_HOST_RESOLVER_IMPL_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 44 matching lines @@
 // from one thread!
 //
 // The HostResolverImpl enforces limits on the maximum number of concurrent
 // threads using PrioritizedDispatcher::Limits.
 //
 // Jobs are ordered in the queue based on their priority and order of arrival.
 class NET_EXPORT HostResolverImpl
     : public HostResolver,
       NON_EXPORTED_BASE(public base::NonThreadSafe),
       public NetworkChangeNotifier::IPAddressObserver,
+      public NetworkChangeNotifier::ConnectionTypeObserver,
       public NetworkChangeNotifier::DNSObserver {
  public:
   // Parameters for ProcTask which resolves hostnames using HostResolveProc.
   //
   // |resolver_proc| is used to perform the actual resolves; it must be
   // thread-safe since it is run from multiple worker threads. If
   // |resolver_proc| is NULL then the default host resolver procedure is
   // used (which is SystemHostResolverProc except if overridden).
   //
   // For each attempt, we could start another attempt if host is not resolved
@@ skipping 158 matching lines @@
   // slots.
   void AbortDnsTasks();
 
   // Attempts to serve each Job in |jobs_| from the HOSTS file if we have
   // a DnsClient with a valid DnsConfig.
   void TryServingAllJobsFromHosts();
 
   // NetworkChangeNotifier::IPAddressObserver:
   void OnIPAddressChanged() override;
 
+  // NetworkChangeNotifier::ConnectionTypeObserver:
+  void OnConnectionTypeChanged(
+      NetworkChangeNotifier::ConnectionType type) override;
+
   // NetworkChangeNotifier::DNSObserver:
   void OnDNSChanged() override;
   void OnInitialDNSConfigRead() override;
 
   void UpdateDNSConfig(bool config_changed);
 
   // True if have a DnsClient with a valid DnsConfig.
   bool HaveDnsConfig() const;
 
   // Called when a host name is successfully resolved and DnsTask was run on it
@@ skipping 66 matching lines @@
 // This function is only exposed so it can be unit-tested.
 // TODO(tfarina): It would be better to change the tests so this function
 // gets exercised indirectly through HostResolverImpl.
 NET_EXPORT_PRIVATE bool ResolveLocalHostname(base::StringPiece host,
                                              uint16_t port,
                                              AddressList* address_list);
 
 }  // namespace net
 
 #endif  // NET_DNS_HOST_RESOLVER_IMPL_H_