Add new ParsedCertificate class, move TrustStore to own file.

net/cert/internal/parse_certificate.cc

 // Copyright 2015 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/parse_certificate.h"
 
 #include <utility>
 
 #include "net/der/input.h"
 #include "net/der/parse_values.h"
@@ skipping 490 matching lines @@
   }
 
   // By definition the input was a single Extensions sequence, so there
   // shouldn't be unconsumed data.
   if (parser.HasMore())
     return false;
 
   return true;
 }
 
+NET_EXPORT bool ConsumeExtension(
+    const der::Input& oid,
+    std::map<der::Input, ParsedExtension>* unconsumed_extensions,
+    ParsedExtension* extension) {
+  auto it = unconsumed_extensions->find(oid);
+  if (it == unconsumed_extensions->end())
+    return false;
+
+  *extension = it->second;
+  unconsumed_extensions->erase(it);
+  return true;
+}
+
 bool ParseBasicConstraints(const der::Input& basic_constraints_tlv,
                            ParsedBasicConstraints* out) {
   der::Parser parser(basic_constraints_tlv);
 
   //    BasicConstraints ::= SEQUENCE {
   der::Parser sequence_parser;
   if (!parser.ReadSequence(&sequence_parser))
     return false;
 
   //         cA                      BOOLEAN DEFAULT FALSE,
@@ skipping 50 matching lines @@
   //
   //     When the keyUsage extension appears in a certificate, at least
   //     one of the bits MUST be set to 1.
   if (BitStringIsAllZeros(*key_usage))
     return false;
 
   return true;
 }
 
 }  // namespace net