Adding TLS 1.3 constants

extensions/browser/api/socket/tls_socket.cc

Index: extensions/browser/api/socket/tls_socket.cc
diff --git a/extensions/browser/api/socket/tls_socket.cc b/extensions/browser/api/socket/tls_socket.cc
index 2f53163484fa54000229e66747a400f569b331e5..3b3cb85d5fd4c41708efeb524b0c16d5c427a7b5 100644
--- a/extensions/browser/api/socket/tls_socket.cc
+++ b/extensions/browser/api/socket/tls_socket.cc
@@ -32,6 +32,8 @@ uint16_t SSLProtocolVersionFromString(const std::string& version_str) {
     version = net::SSL_PROTOCOL_VERSION_TLS1_1;
   } else if (version_str == "tls1.2") {
     version = net::SSL_PROTOCOL_VERSION_TLS1_2;
+  } else if (version_str == "tls1.3") {
+    version = net::SSL_PROTOCOL_VERSION_TLS1_3;

[davidben, 2016/07/18 09:46:40]

We probably should not expose this until it's working. Maybe leave a TODO or
something.

[svaldez, 2016/07/18 10:04:01]

Done.

   }
   return version;
 }
@@ -309,4 +311,3 @@ void TLSSocket::UpgradeSocketToTLS(
 }
 
 }  // namespace extensions
-