Update Token Binding code to the latest drafts

net/http/http_stream_factory_impl_unittest.cc

Index: net/http/http_stream_factory_impl_unittest.cc
diff --git a/net/http/http_stream_factory_impl_unittest.cc b/net/http/http_stream_factory_impl_unittest.cc
index 2a00dfc194c06e0bd6ebf512c619d843623f0b13..d3f373e1453bc97dd4b57a7750c221ffd6584a6e 100644
--- a/net/http/http_stream_factory_impl_unittest.cc
+++ b/net/http/http_stream_factory_impl_unittest.cc
@@ -119,8 +119,9 @@ class MockWebSocketHandshakeStream : public WebSocketHandshakeStreamBase {
   void GetSSLInfo(SSLInfo* ssl_info) override {}
   void GetSSLCertRequestInfo(SSLCertRequestInfo* cert_request_info) override {}
   bool GetRemoteEndpoint(IPEndPoint* endpoint) override { return false; }
-  Error GetSignedEKMForTokenBinding(crypto::ECPrivateKey* key,
-                                    std::vector<uint8_t>* out) override {
+  Error GetTokenBindingSignature(crypto::ECPrivateKey* key,
+                                 TokenBindingType tb_type,
+                                 std::vector<uint8_t>* out) override {
     ADD_FAILURE();
     return ERR_NOT_IMPLEMENTED;
   }