Make DnsSocketPool copy RandIntCallback

net/dns/dns_socket_pool.h

Index: net/dns/dns_socket_pool.h
diff --git a/net/dns/dns_socket_pool.h b/net/dns/dns_socket_pool.h
index cc326fbb722bbf93f5bb24b0e8dc94fd21b52b56..f4f00bba6e4480f06ecaef3e6f03c83aba9821a9 100644
--- a/net/dns/dns_socket_pool.h
+++ b/net/dns/dns_socket_pool.h
@@ -26,7 +26,7 @@ class StreamSocket;
 // to DNS servers.
 class NET_EXPORT_PRIVATE DnsSocketPool {
  public:
-  virtual ~DnsSocketPool() { }
+  virtual ~DnsSocketPool();
 
   // Creates a DnsSocketPool that implements the default strategy for managing
   // sockets.  (This varies by platform; see DnsSocketPoolImpl in
@@ -85,7 +85,7 @@ class NET_EXPORT_PRIVATE DnsSocketPool {
 
  private:
   ClientSocketFactory* socket_factory_;
-  const RandIntCallback& rand_int_callback_;
+  const RandIntCallback rand_int_callback_;
   NetLog* net_log_;
   const std::vector<IPEndPoint>* nameservers_;
   bool initialized_;