This updates the StaticIP configuration UI to match new mocks.

chrome/browser/chromeos/cros/cros_network_functions.h

Index: chrome/browser/chromeos/cros/cros_network_functions.h
diff --git a/chrome/browser/chromeos/cros/cros_network_functions.h b/chrome/browser/chromeos/cros/cros_network_functions.h
index f8adb266a09e21f7536ca0294a4d3c89b4be89cd..7050c875fd20a9503483c0afc3091f8337a8435a 100644
--- a/chrome/browser/chromeos/cros/cros_network_functions.h
+++ b/chrome/browser/chromeos/cros/cros_network_functions.h
@@ -293,6 +293,15 @@ bool CrosGetWifiAccessPoints(WifiAccessPointVector* result);
 // Configures the network service specified by |properties|.
 void CrosConfigureService(const base::DictionaryValue& properties);
 
+// Converts a |prefix_length| to a netmask. (for IPv4 only)
+// e.g. a |prefix_length| of 24 is converted to a netmask of "255.255.255.0".
+// Invalid prefix lengths will return the empty string.
+std::string CrosPrefixLengthToNetmask(int32 prefix_length);
+
+// Converts a |netmask| to a prefixlen. (for IPv4 only)
+// e.g. a |netmask| of 255.255.255.0 is converted to a prefixlen of 24
+int32 CrosNetmaskToPrefixLength(const std::string& netmask);
+
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_CROS_CROS_NETWORK_FUNCTIONS_H_