Update Token Binding code to the latest drafts

net/spdy/spdy_session.h

Index: net/spdy/spdy_session.h
diff --git a/net/spdy/spdy_session.h b/net/spdy/spdy_session.h
index 0e0d08b80fc42af857c97763832f1a7e30fa4dcb..f9ce0cb48177b9586288d004ef435ff6d20dcb20 100644
--- a/net/spdy/spdy_session.h
+++ b/net/spdy/spdy_session.h
@@ -415,10 +415,12 @@ class NET_EXPORT SpdySession : public BufferedSpdyFramerVisitorInterface,
   // Returns the protocol negotiated via ALPN for the underlying socket.
   NextProto GetNegotiatedProtocol() const;
 
-  // Signs the EKM value for Token Binding from the TLS layer using |*key| and
-  // puts the result in |*out|. Returns OK or ERR_FAILED.
-  Error GetSignedEKMForTokenBinding(crypto::ECPrivateKey* key,
-                                    std::vector<uint8_t>* out);
+  // Generates the signature used in Token Binding using |*key| and for a Token
+  // Binding of type |tb_type|, putting the signature in |*out|. Returns a net
+  // error code of OK or ERR_FAILED.
+  Error GetTokenBindingSignature(crypto::ECPrivateKey* key,
+                                 TokenBindingType tb_type,
+                                 std::vector<uint8_t>* out);
 
   // Send a WINDOW_UPDATE frame for a stream. Called by a stream
   // whenever receive window size is increased.