Add an out parameter to VerifyCertificateChain for retrieving the trusted chain.

net/cert/internal/verify_certificate_chain.h

Index: net/cert/internal/verify_certificate_chain.h
diff --git a/net/cert/internal/verify_certificate_chain.h b/net/cert/internal/verify_certificate_chain.h
index 4d85eb66401420ffabfae705d8ac9a7c3c333c43..db6157d594b1b7fb476822fa5f36ab311a6692b7 100644
--- a/net/cert/internal/verify_certificate_chain.h
+++ b/net/cert/internal/verify_certificate_chain.h
@@ -51,6 +51,12 @@ class TrustStore;
 //   time:
 //     The UTC time to use for expiration checks.
 //
+//   trusted_chain_out:
+//     The vector to populate with the verified trusted certificate chain.
+//     If a nullptr is passed, this parameter is ignored.
+//     If the target certificate can not be verified, this parameter is
+//     ignored.

[eroman, 2016/06/16 22:11:36]

Please additionally mention the order of the vector -- namely
trusted_chain_out->front() is the target certificate, and
trusted_chain_out->back() is the trust anchor.

[ryanchung, 2016/06/16 22:47:08]

Done.

+//
 // ---------
 // Outputs
 // ---------
@@ -60,7 +66,9 @@ NET_EXPORT bool VerifyCertificateChain(
     const std::vector<scoped_refptr<ParsedCertificate>>& cert_chain,
     const TrustStore& trust_store,
     const SignaturePolicy* signature_policy,
-    const der::GeneralizedTime& time) WARN_UNUSED_RESULT;
+    const der::GeneralizedTime& time,
+    std::vector<scoped_refptr<ParsedCertificate>>* trusted_chain_out)
+    WARN_UNUSED_RESULT;
 
 }  // namespace net