WIP: NSS trust store integration for path builder.

net/cert/internal/cert_issuer_source_collection.h

Index: net/cert/internal/cert_issuer_source_collection.h
diff --git a/net/cert/internal/cert_issuer_source_collection.h b/net/cert/internal/cert_issuer_source_collection.h
new file mode 100644
index 0000000000000000000000000000000000000000..70c096152fd0cef2261d538f87fca1a35b45b77a
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+++ b/net/cert/internal/cert_issuer_source_collection.h
@@ -0,0 +1,38 @@
+// 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.
+
+#ifndef NET_CERT_INTERNAL_CERT_ISSUER_SOURCE_COLLECTION_H_
+#define NET_CERT_INTERNAL_CERT_ISSUER_SOURCE_COLLECTION_H_
+
+#include <vector>
+
+#include "net/cert/internal/cert_issuer_source.h"
+
+namespace net {
+
+// Returns results from a collection of other CertIssuerSources.
+class NET_EXPORT CertIssuerSourceCollection : public CertIssuerSource {
+ public:
+  CertIssuerSourceCollection();
+  ~CertIssuerSourceCollection() override;
+
+  // Adds |source| to the list of CertIssuerSources that will provide issuers.
+  void AddSource(CertIssuerSource* source);
+
+  // CertIssuerSource implementation:
+  void SyncGetIssuersOf(const ParsedCertificate* cert,
+                        ParsedCertificateList* issuers) override;
+  void AsyncGetIssuersOf(scoped_refptr<ParsedCertificate> cert,
+                         const IssuerCallback& issuers_callback,
+                         std::unique_ptr<Request>* out_req) override;
+
+ private:
+  std::vector<CertIssuerSource*> sources_;
+
+  DISALLOW_COPY_AND_ASSIGN(CertIssuerSourceCollection);
+};
+
+}  // namespace net
+
+#endif  // NET_CERT_INTERNAL_CERT_ISSUER_SOURCE_COLLECTION_H_