net: extract net/cert out of net/base

net/base/cert_trust_anchor_provider.h

-// Copyright (c) 2013 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_BASE_CERT_TRUST_ANCHOR_PROVIDER_H_
-#define NET_BASE_CERT_TRUST_ANCHOR_PROVIDER_H_
-
-#include <vector>
-
-#include "base/memory/ref_counted.h"
-#include "net/base/net_export.h"
-
-namespace net {
-
-class X509Certificate;
-typedef std::vector<scoped_refptr<X509Certificate> > CertificateList;
-
-// Interface to retrieve the current list of additional trust anchors.
-// This is used by CertVerifier to get a list of anchors to trust in addition to
-// the anchors known to the CertVerifier.
-class NET_EXPORT CertTrustAnchorProvider {
- public:
-  virtual ~CertTrustAnchorProvider() {}
-
-  // Returns a list of certificates to be used as trust anchors during
-  // certificate validation, in addition to (eg: the union of) any pre-existing
-  // or pre-configured trust anchors.
-  virtual const CertificateList& GetAdditionalTrustAnchors() = 0;
-};
-
-}  // namespace net
-
-#endif  // NET_BASE_CERT_TRUST_ANCHOR_PROVIDER_H_