Refactor: Change the interface HostResolver::DisableIPv6() to HostResolver::SetDefaultA...

net/base/host_resolver.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_HOST_RESOLVER_H_
 #define NET_BASE_HOST_RESOLVER_H_
 
 #include <string>
 
 #include "base/ref_counted.h"
@@ skipping 130 matching lines @@
   // Unregisters an observer previously added by AddObserver().
   virtual void RemoveObserver(Observer* observer) = 0;
 
   // Returns the host cache, or NULL if this implementation does not use
   // a HostCache.
   virtual HostCache* GetHostCache() = 0;
 
   // TODO(eroman): temp hack for http://crbug.com/18373
   virtual void Shutdown() = 0;
 
-  // Disables or enables support for IPv6 results.
-  virtual void DisableIPv6(bool disable_ipv6) {}
+  // Sets the default AddressFamily to use when requests have left it
+  // unspecified. For example, this could be used to restrict resolution
+  // results to AF_INET by passing in ADDRESS_FAMILY_IPV4, or to
+  // AF_INET6 by passing in ADDRESS_FAMILY_IPV6.
+  virtual void SetDefaultAddressFamily(AddressFamily address_family) {}
 
  protected:
   HostResolver() { }
 
  private:
   DISALLOW_COPY_AND_ASSIGN(HostResolver);
 };
 
 // This class represents the task of resolving a hostname (or IP address
 // literal) to an AddressList object.  It wraps HostResolver to resolve only a
@@ skipping 33 matching lines @@
 };
 
 // Creates a HostResolver implementation that queries the underlying system.
 // (Except if a unit-test has changed the global HostResolverProc using
 // ScopedHostResolverProc to intercept requests to the system).
 HostResolver* CreateSystemHostResolver();
 
 }  // namespace net
 
 #endif  // NET_BASE_HOST_RESOLVER_H_