Improvements to the net/cert/internal error handling.

net/cert/internal/cert_error_scoper.h

-// 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_ERROR_SCOPER_H_
-#define NET_CERT_INTERNAL_CERT_ERROR_SCOPER_H_
-
-#include <memory>
-
-#include "base/compiler_specific.h"
-#include "base/macros.h"
-#include "net/base/net_export.h"
-#include "net/cert/internal/cert_error_id.h"
-
-namespace net {
-
-class CertErrors;
-struct CertErrorNode;
-
-// CertErrorScoper is a base class for adding parent nodes into a CertErrors
-// object.
-class NET_EXPORT CertErrorScoper {
- public:
-  explicit CertErrorScoper(CertErrors* parent_errors);
-  virtual ~CertErrorScoper();
-
-  // BuildRootNode() will be called at most once, to create the desired parent
-  // node. It may never be called if no errors are added to the CertErrors
-  // parent.
-  virtual std::unique_ptr<CertErrorNode> BuildRootNode() = 0;
-
-  // Returns the parent node for this scoper (the one created by
-  // BuildRootNode()).
-  CertErrorNode* LazyGetRootNode();
-
- private:
-  CertErrorScoper* parent_scoper_ = nullptr;
-  CertErrors* parent_errors_ = nullptr;
-  CertErrorNode* root_node_ = nullptr;
-
-  DISALLOW_COPY_AND_ASSIGN(CertErrorScoper);
-};
-
-// Implementation of CertErrorScoper that creates a simple parent node with no
-// parameters (just an ID).
-class NET_EXPORT CertErrorScoperNoParams : public CertErrorScoper {
- public:
-  CertErrorScoperNoParams(CertErrors* parent_errors, CertErrorId id);
-  std::unique_ptr<CertErrorNode> BuildRootNode() override;
-
- private:
-  CertErrorId id_;
-
-  DISALLOW_COPY_AND_ASSIGN(CertErrorScoperNoParams);
-};
-
-}  // namespace net
-
-#endif  // NET_CERT_INTERNAL_CERT_ERROR_SCOPER_H_