Expose OpenSSL's key_exchange_info in the content API

net/ssl/ssl_cipher_suite_names.h

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef NET_SSL_SSL_CIPHER_SUITE_NAMES_H_
 #define NET_SSL_SSL_CIPHER_SUITE_NAMES_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 42 matching lines @@
 // cipher suites: https://http2.github.io/http2-spec/#TLSUsage.
 //
 // Currently, this function follows these criteria:
 // 1) Only uses forward secure key exchanges
 // 2) Only uses AEADs
 NET_EXPORT bool IsSecureTLSCipherSuite(uint16 cipher_suite);
 
 // Returns true if |cipher_suite| is suitable for use with False Start.
 NET_EXPORT bool IsFalseStartableTLSCipherSuite(uint16 cipher_suite);
 
+// Returns the static curve name of |key_exchange_info| if the |cipher_suite|
+// is an elliptic curve, and a name is known. Returns nullptr otherwise.
+// Only defined for OpenSSL, returns nullptr otherwise.
+NET_EXPORT const char* ECCurveName(uint16 cipher_suite, int key_exchange_info);
+
 }  // namespace net
 
 #endif  // NET_SSL_SSL_CIPHER_SUITE_NAMES_H_