Add a key purpose parameter to Certificate PathBuilder.

net/cert/internal/test_helpers.h

 // Copyright 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.
 
 #ifndef NET_CERT_INTERNAL_TEST_HELPERS_H_
 #define NET_CERT_INTERNAL_TEST_HELPERS_H_
 
 #include <stddef.h>
 
 #include <ostream>
 #include <string>
 #include <vector>
 
 #include "net/cert/internal/parsed_certificate.h"
 #include "net/cert/internal/trust_store.h"
+#include "net/cert/internal/verify_certificate_chain.h"
 #include "net/der/input.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace net {
 
 namespace der {
 
 // This function is used by GTest to support EXPECT_EQ() for der::Input.
 void PrintTo(const Input& data, ::std::ostream* os);
 
@@ skipping 58 matching lines @@
 
   // The chain of certificates (with the zero-th being the target).
   ParsedCertificateList chain;
 
   // The trust anchor to use when verifying the chain.
   scoped_refptr<TrustAnchor> trust_anchor;
 
   // The time to use when verifying the chain.
   der::GeneralizedTime time;
 
+  // The Key Purpose to use when verifying the chain.
+  KeyPurpose key_purpose = KeyPurpose::ANY_EKU;
+
   // The expected result from verification.
   bool expected_result = false;
 
   // The expected errors from verification (as a string).
   std::string expected_errors;
 };
 
 // Reads a test case from |file_path_ascii| (which is relative to //src).
 // Generally |file_path_ascii| will start with:
 //   net/data/verify_certificate_chain_unittest/
 void ReadVerifyCertChainTestFromFile(const std::string& file_path_ascii,
                                      VerifyCertChainTest* test);
 
 // Reads a data file relative to the src root directory.
 std::string ReadTestFileToString(const std::string& file_path_ascii);
 
 }  // namespace net
 
 #endif  // NET_CERT_INTERNAL_TEST_HELPERS_H_