Implement Token Binding negotiation TLS extension

net/socket/ssl_client_socket.cc

Index: net/socket/ssl_client_socket.cc
diff --git a/net/socket/ssl_client_socket.cc b/net/socket/ssl_client_socket.cc
index 8f88b31f0ce10052b4857167e4f4e7a60ba7d54e..64c38a5db362fbd1d96b40c27b9599776628a9be 100644
--- a/net/socket/ssl_client_socket.cc
+++ b/net/socket/ssl_client_socket.cc
@@ -172,6 +172,17 @@ bool SSLClientSocket::IsChannelIDEnabled(
 }
 
 // static
+bool SSLClientSocket::IsTokenBindingEnabled(
+    const SSLConfig& ssl_config,
+    ChannelIDService* channel_id_service) {
+  if (ssl_config.token_binding_params.size() != 1 ||
+      ssl_config.token_binding_params[0] != TB_PARAM_ECDSAP256_SHA256) {
+    return false;
+  }
+  return IsChannelIDEnabled(ssl_config, channel_id_service);
+}
+
+// static
 bool SSLClientSocket::HasCipherAdequateForHTTP2(
     const std::vector<uint16>& cipher_suites) {
   for (uint16 cipher : cipher_suites) {