ONC: Add IPAddressConfigType and NameServersConfigType

components/onc/onc_constants.cc

Index: components/onc/onc_constants.cc
diff --git a/components/onc/onc_constants.cc b/components/onc/onc_constants.cc
index e110dee4c7cf02cda143cbf168214e9fb3968243..14c588636a8bceb00d826fe211b6c1a42beb4375 100644
--- a/components/onc/onc_constants.cc
+++ b/components/onc/onc_constants.cc
@@ -39,8 +39,12 @@ const char kDevice[] = "Device";
 const char kErrorState[] = "ErrorState";
 const char kEthernet[] = "Ethernet";
 const char kGUID[] = "GUID";
+const char kIPAddressConfigType[] = "IPAddressConfigType";
 const char kIPConfigs[] = "IPConfigs";
+const char kIPConfigTypeDHCP[] = "DHCP";
+const char kIPConfigTypeStatic[] = "Static";
 const char kMacAddress[] = "MacAddress";
+const char kNameServersConfigType[] = "NameServersConfigType";
 const char kName[] = "Name";
 const char kPriority[] = "Priority";
 const char kProxySettings[] = "ProxySettings";