Add a boolean |had_context| argument to the TLS ExportKeyingMaterial

net/socket/ssl_socket.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_SOCKET_SSL_SOCKET_H_
 #define NET_SOCKET_SSL_SOCKET_H_
 
 #include "base/basictypes.h"
 #include "base/string_piece.h"
 #include "net/socket/stream_socket.h"
 
 namespace net {
 
 // SSLSocket interface defines method that are common between client
 // and server SSL sockets.
 class NET_EXPORT SSLSocket : public StreamSocket {
 public:
   virtual ~SSLSocket() {}
 
   // Exports data derived from the SSL master-secret (see RFC 5705).
-  // The call will fail with an error if the socket is not connected, or the
-  // SSL implementation does not support the operation.
+  // If |has_context| is false, uses the no-context construction from the
+  // RFC and |context| is ignored.  The call will fail with an error if
+  // the socket is not connected, or the SSL implementation does not

[Ryan Sleevi, 2012/03/10 04:23:31]

nit: No comma needed here. If you do leave it, then ", or if"

+  // support the operation.
   virtual int ExportKeyingMaterial(const base::StringPiece& label,
+                                   bool has_context,
                                    const base::StringPiece& context,
                                    unsigned char *out,
                                    unsigned int outlen) = 0;
 };
 
 }  // namespace net
 
 #endif  // NET_SOCKET_SSL_SOCKET_H_