Add initial CertVerifyProcBuiltin.

net/cert/internal/cert_errors.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.
 
 // ----------------------------
 // Overview of error design
 // ----------------------------
 //
 // Certificate path validation/parsing may emit a sequence of
 // errors/warnings/context. These are represented by a tree of CertErrorNodes.
@@ skipping 121 matching lines @@
 
   // Returns true if the tree is empty. Note that emptiness of the error tree
   // is NOT equivalent to success for some call, and vice versa. (For instance
   // consumers may forget to emit errors on failures, or some errors may be
   // non-fatal warnings).
   bool empty() const;
 
   // Dumps a textual representation of the errors for debugging purposes.
   std::string ToDebugString() const;
 
+  // Returns true the error |id| was added to this CertErrors (at any depth).
+  bool ContainsError(CertErrorId id) const;
+
  private:
   // CertErrorScoper manipulates the CertErrors object.
   friend class CertErrorScoper;
 
   void AddNode(std::unique_ptr<CertErrorNode> node);
 
   // Used by CertErrorScoper to register itself as the top-level scoper.
   // Returns the previously set scoper, or nullptr if there was none.
   CertErrorScoper* SetScoper(CertErrorScoper* scoper);
 
   CertErrorNodes nodes_;
 
   // The top-most CertErrorScoper that is currently in scope (and which affects
   // the parent node for newly added errors).
   CertErrorScoper* current_scoper_ = nullptr;
 
   DISALLOW_COPY_AND_ASSIGN(CertErrors);
 };
 
 }  // namespace net
 
 #endif  // NET_CERT_INTERNAL_CERT_ERRORS_H_