Add scripts to generate simple test data for certificate verification.

net/data/verify_certificate_chain_unittest/generate-target-not-end-entity.py

Index: net/data/verify_certificate_chain_unittest/generate-target-not-end-entity.py
diff --git a/net/data/verify_certificate_chain_unittest/generate-target-not-end-entity.py b/net/data/verify_certificate_chain_unittest/generate-target-not-end-entity.py
new file mode 100755
index 0000000000000000000000000000000000000000..dfe54e4e475b81556a21ad6375f7d23cbe3b2de7
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+++ b/net/data/verify_certificate_chain_unittest/generate-target-not-end-entity.py
@@ -0,0 +1,31 @@
+#!/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.
+
+import os
+import sys
+
+sys.path.insert(0, os.path.dirname(__file__))
+import common
+
+description = """Certificate chain with 1 intermediary, a trusted
+root, and a target certificate that is also a CA"""
+
+common.Init(__file__)
+
+# Self-signed root certificate (part of trust store).
+root = common.CreateSelfSignedRootCertificate('Root')
+
+# Intermediary certificate.
+intermediary = common.CreateIntermediaryCertificate('Intermediary', root)
+
+# Target certificate (is also a CA)
+target = common.CreateIntermediaryCertificate('Target', intermediary)
+
+chain = [target, intermediary]
+trusted = [root]
+time = common.DEFAULT_TIME
+verify_result = False
+
+common.WriteTestFile(description, chain, trusted, time, verify_result)