Add MacAddress to ONC and networkingPrivate

chromeos/network/network_util.cc

Index: chromeos/network/network_util.cc
diff --git a/chromeos/network/network_util.cc b/chromeos/network/network_util.cc
index 35980b22c6c50736bd0e36d04e97f0f408c6f1f7..ac102ecaa0e92917baaf0383a2894932204e0eac 100644
--- a/chromeos/network/network_util.cc
+++ b/chromeos/network/network_util.cc
@@ -99,6 +99,18 @@ int32 NetmaskToPrefixLength(const std::string& netmask) {
   return prefix_length;
 }
 
+std::string FormattedMacAddress(const std::string& shill_mac_address) {
+  if (shill_mac_address.size() % 2 != 0)
+    return shill_mac_address;
+  std::string result;
+  for (size_t i = 0; i < shill_mac_address.size(); ++i) {
+    if ((i != 0) && (i % 2 == 0))
+      result.push_back(':');
+    result.push_back(shill_mac_address[i]);
+  }
+  return result;
+}
+
 bool ParseCellularScanResults(const base::ListValue& list,
                               std::vector<CellularScanResult>* scan_results) {
   scan_results->clear();