Add CertIssuerSource interface and CertIssuerSourceStatic implementation.

net/cert/internal/cert_issuer_source_static.cc

Index: net/cert/internal/cert_issuer_source_static.cc
diff --git a/net/cert/internal/cert_issuer_source_static.cc b/net/cert/internal/cert_issuer_source_static.cc
new file mode 100644
index 0000000000000000000000000000000000000000..c7685f436a1bbf45b703e26b08614535eba21c5f
--- /dev/null
+++ b/net/cert/internal/cert_issuer_source_static.cc
@@ -0,0 +1,36 @@
+// Copyright 2016 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.
+
+#include "net/cert/internal/cert_issuer_source_static.h"
+
+#include "net/cert/internal/parsed_certificate.h"
+
+namespace net {
+
+CertIssuerSourceStatic::CertIssuerSourceStatic() = default;
+CertIssuerSourceStatic::~CertIssuerSourceStatic() = default;
+
+void CertIssuerSourceStatic::AddCert(scoped_refptr<ParsedCertificate> cert) {
+  intermediates_.insert(std::make_pair(
+      cert->normalized_subject().AsStringPiece(), std::move(cert)));
+}
+
+void CertIssuerSourceStatic::SyncGetIssuersOf(
+    const ParsedCertificate* cert,
+    std::vector<scoped_refptr<ParsedCertificate>>* issuers) {
+  auto range =
+      intermediates_.equal_range(cert->normalized_issuer().AsStringPiece());
+  for (auto it = range.first; it != range.second; ++it)
+    issuers->push_back(it->second);
+}
+
+void CertIssuerSourceStatic::AsyncGetIssuersOf(
+    const ParsedCertificate* cert,
+    const IssuerCallback& issuers_callback,
+    std::unique_ptr<Request>* out_req) {
+  // CertIssuerSourceStatic never returns asynchronous results.
+  out_req->reset();

[eroman, 2016/06/01 23:30:23]

should we reset out_req too?

[mattm, 2016/06/01 23:48:33]

Isn't that what it's doing? 

[eroman, 2016/06/01 23:53:06]

.... yeah.....
sorry, dunno what my brain did right there

+}
+
+}  // namespace net