net: allow invalid TransportSecurityState to process invalid DNS names.

net/base/dns_util.cc

Index: net/base/dns_util.cc
diff --git a/net/base/dns_util.cc b/net/base/dns_util.cc
index 5d47d4b8b5a4ac57720703927141788f1d5eceb5..c095eb80ad6cd49bb0e61d8c9c9f9eafdfc48e3d 100644
--- a/net/base/dns_util.cc
+++ b/net/base/dns_util.cc
@@ -80,20 +80,6 @@ std::string DNSDomainToString(const base::StringPiece& domain) {
   return ret;
 }
 
-bool IsSTD3ASCIIValidCharacter(char c) {
-  if (c <= 0x2c)
-    return false;
-  if (c >= 0x7b)
-    return false;
-  if (c >= 0x2e && c <= 0x2f)
-    return false;
-  if (c >= 0x3a && c <= 0x40)
-    return false;
-  if (c >= 0x5b && c <= 0x60)
-    return false;
-  return true;
-}
-
 std::string TrimEndingDot(const base::StringPiece& host) {
   base::StringPiece host_trimmed = host;
   size_t len = host_trimmed.length();