Add a new GetTlsUniqueChannelBinding method to SSLSocket, and implement nss version.

net/socket/ssl_socket.h

Index: net/socket/ssl_socket.h
diff --git a/net/socket/ssl_socket.h b/net/socket/ssl_socket.h
index bd063a425af7d10bdd77fb3bdf9c959f63e5980e..c134ac563380cc0591e3ff36631cd6493257cc50 100644
--- a/net/socket/ssl_socket.h
+++ b/net/socket/ssl_socket.h
@@ -27,6 +27,9 @@ public:
                                    const base::StringPiece& context,
                                    unsigned char* out,
                                    unsigned int outlen) = 0;
+
+  // Stores the the tls-unique channel binding (see RFC 5929) in |out|.

[wtc, 2012/07/30 22:42:26]

Nit: |out| => |*out| ?

[Ryan Hamilton, 2012/07/31 16:12:21]

Done.

+  virtual int GetTLSUniqueChannelBinding(std::string* out) = 0;
 };
 
 }  // namespace net