Reland of TLS CECPQ1 (experimental post-quantum) ciphers.

net/socket/ssl_client_socket_pool.cc

Index: net/socket/ssl_client_socket_pool.cc
diff --git a/net/socket/ssl_client_socket_pool.cc b/net/socket/ssl_client_socket_pool.cc
index a4b497d742c9646fa9dfdedbe5c6d91ca6d4c3f9..e60c880e9f3f43b0a1a7af68c328daf52d5703a9 100644
--- a/net/socket/ssl_client_socket_pool.cc
+++ b/net/socket/ssl_client_socket_pool.cc
@@ -383,6 +383,8 @@
     } else if (strncmp(str, "ECDHE_", 6) == 0) {
       UMA_HISTOGRAM_SPARSE_SLOWLY("Net.SSL_KeyExchange.ECDHE",
                                   ssl_info.key_exchange_info);
+    } else if (strncmp(str, "CECPQ1_", 7) == 0) {
+      // Nothing.
     } else {
       DCHECK_EQ(0, strcmp(str, "RSA"));
     }