Extend net/base/parse_number.h for parsing of negative numbers, and determining if there was overflo

net/cert/x509_cert_types.cc

Index: net/cert/x509_cert_types.cc
diff --git a/net/cert/x509_cert_types.cc b/net/cert/x509_cert_types.cc
index 766a1f0429b3a6add189dc7ba5065d5e5cd982b8..f439c2655f6fe6eda3320bdd394245069e04d07f 100644
--- a/net/cert/x509_cert_types.cc
+++ b/net/cert/x509_cert_types.cc
@@ -23,8 +23,8 @@ namespace {
 // untouched otherwise. Returns the parsed integer.
 int ParseIntAndAdvance(const char** field, size_t field_len, bool* ok) {
   int result = 0;
-  *ok &=
-      ParseNonNegativeDecimalInt(base::StringPiece(*field, field_len), &result);
+  *ok &= ParseIntegerBase10(base::StringPiece(*field, field_len),
+                            ParseInteger::DISALLOW_NEGATIVE, &result);
   *field += field_len;
   return result;
 }