Add error information to VerifyCertificateChain().

net/cert/internal/verify_certificate_chain_unittest.cc

Index: net/cert/internal/verify_certificate_chain_unittest.cc
diff --git a/net/cert/internal/verify_certificate_chain_unittest.cc b/net/cert/internal/verify_certificate_chain_unittest.cc
index 225dcabcade525cea223e9c38dbc955534600566..8c3d3d0ad9671e0f2a37987175786f28e07366cf 100644
--- a/net/cert/internal/verify_certificate_chain_unittest.cc
+++ b/net/cert/internal/verify_certificate_chain_unittest.cc
@@ -17,15 +17,27 @@ class VerifyCertificateChainDelegate {
   static void Verify(const ParsedCertificateList& chain,
                      const scoped_refptr<TrustAnchor>& trust_anchor,
                      const der::GeneralizedTime& time,
-                     bool expected_result) {
+                     bool expected_result,
+                     const std::string& expected_errors) {
     ASSERT_TRUE(trust_anchor);
 
     SimpleSignaturePolicy signature_policy(1024);
 
+    CertErrors errors;
     bool result = VerifyCertificateChain(chain, trust_anchor.get(),
-                                         &signature_policy, time);
-
-    ASSERT_EQ(expected_result, result);
+                                         &signature_policy, time, &errors);
+
+    // Check that the error types match (parameters and context is not
+    // considered for simplicity).
+    std::string actual_errors;
+    for (const auto& error : errors.errors()) {
+      if (!actual_errors.empty())
+        actual_errors += "\n";
+      actual_errors += error.type;
+    }
+    EXPECT_EQ(expected_errors, actual_errors);
+
+    EXPECT_EQ(expected_result, result);
   }
 };