Add error information to VerifyCertificateChain().

net/data/verify_certificate_chain_unittest/generate-unknown-root.py

Index: net/data/verify_certificate_chain_unittest/generate-unknown-root.py
diff --git a/net/data/verify_certificate_chain_unittest/generate-unknown-root.py b/net/data/verify_certificate_chain_unittest/generate-unknown-root.py
deleted file mode 100755
index 7de9d67a72361101a0360f9335b9b8feabe5a908..0000000000000000000000000000000000000000
--- a/net/data/verify_certificate_chain_unittest/generate-unknown-root.py
+++ /dev/null
@@ -1,30 +0,0 @@
-#!/usr/bin/python
-# Copyright (c) 2015 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.
-
-"""Certificate chain with 1 intermediate, but the root is not in trust store.
-Verification is expected to fail because the final intermediate (Intermediate)
-does not chain to a known root."""
-
-import common
-
-# Self-signed root certificate, which is NOT saved as the trust anchor.
-root = common.create_self_signed_root_certificate('Root')
-
-# Intermediate certificate.
-intermediate = common.create_intermediate_certificate('Intermediate', root)
-
-# Target certificate.
-target = common.create_end_entity_certificate('Target', intermediate)
-
-# Self-signed root certificate, not part of chain, which is saved as trust
-# anchor.
-bogus_root = common.create_self_signed_root_certificate('BogusRoot')
-
-chain = [target, intermediate]
-trusted = common.TrustAnchor(bogus_root, constrained=False)
-time = common.DEFAULT_TIME
-verify_result = False
-
-common.write_test_file(__doc__, chain, trusted, time, verify_result)