Adding a NetworkProfileHandler used by ManagedNetworkConfigurationHandler.

chromeos/network/onc/onc_validator.h

Index: chromeos/network/onc/onc_validator.h
diff --git a/chromeos/network/onc/onc_validator.h b/chromeos/network/onc/onc_validator.h
index 1de930b32b2cd3b06c1171e6f94d2f918e4b8cf2..539224f2a3148899ac92e3cdd297e358c717c001 100644
--- a/chromeos/network/onc/onc_validator.h
+++ b/chromeos/network/onc/onc_validator.h
@@ -217,9 +217,7 @@ class CHROMEOS_EXPORT Validator : public Mapper {
 
   bool CertPatternInDevicePolicy(const std::string& cert_type);
 
-  std::string WarningHeader();
-  std::string ErrorHeader();
-  std::string MessageHeader(bool is_error);
+  std::string MessageHeader();
 
   const bool error_on_unknown_field_;
   const bool error_on_wrong_recommended_;