DNS: Add stubs for persisting data across restarts

net/dns/dns_socket_pool.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_SOCKET_POOL_H_
 #define NET_DNS_DNS_SOCKET_POOL_H_
 
 #include <memory>
 #include <vector>
 
@@ skipping 35 matching lines @@
   // for which the DnsSocketPool will manage sockets; |net_log| is the NetLog
   // used when constructing sockets with the factory.
   //
   // Initialize may not be called more than once, and must be called before
   // calling AllocateSocket or FreeSocket.
   virtual void Initialize(
       const std::vector<IPEndPoint>* nameservers,
       NetLog* net_log) = 0;
 
   // Allocates a socket that is already connected to the nameserver referenced
-  // by |server_index|.  May return a scoped_ptr to NULL if no sockets are
+  // by |server_index|.  May return a std::unique_ptr to NULL if no sockets are
   // available to reuse and the factory fails to produce a socket (or produces
   // one on which Connect fails).
   virtual std::unique_ptr<DatagramClientSocket> AllocateSocket(
       unsigned server_index) = 0;
 
   // Frees a socket allocated by AllocateSocket.  |server_index| must be the
   // same index passed to AllocateSocket.
   virtual void FreeSocket(unsigned server_index,
                           std::unique_ptr<DatagramClientSocket> socket) = 0;
 
@@ skipping 22 matching lines @@
   NetLog* net_log_;
   const std::vector<IPEndPoint>* nameservers_;
   bool initialized_;
 
   DISALLOW_COPY_AND_ASSIGN(DnsSocketPool);
 };
 
 } // namespace net
 
 #endif // NET_DNS_DNS_SOCKET_POOL_H_