Change scoped_ptr to std::unique_ptr in //net/socket.

net/socket/client_socket_pool_manager.cc

Index: net/socket/client_socket_pool_manager.cc
diff --git a/net/socket/client_socket_pool_manager.cc b/net/socket/client_socket_pool_manager.cc
index dee8218294a2ffb0aa05eac5cc01a15a1cb6d4bb..ce8a5a5bfc03481afbf2deeff3cd3bac25ac3e65 100644
--- a/net/socket/client_socket_pool_manager.cc
+++ b/net/socket/client_socket_pool_manager.cc
@@ -85,7 +85,7 @@ int InitSocketPoolHelper(ClientSocketPoolManager::SocketGroupType group_type,
                          const CompletionCallback& callback) {
   scoped_refptr<HttpProxySocketParams> http_proxy_params;
   scoped_refptr<SOCKSSocketParams> socks_params;
-  scoped_ptr<HostPortPair> proxy_host_port;
+  std::unique_ptr<HostPortPair> proxy_host_port;
 
   bool using_ssl = group_type == ClientSocketPoolManager::SSL_GROUP;
   HostPortPair origin_host_port = endpoint;