Added prefixLength to the items in the result of a getNetworkList. This allows the broadcast addres…

chrome/common/extensions/api/socket.idl

Index: chrome/common/extensions/api/socket.idl
diff --git a/chrome/common/extensions/api/socket.idl b/chrome/common/extensions/api/socket.idl
index e727d84ec17c6ecc9355cc1fef15986a960dc4b4..5b76525352e0cf564682d8f25b2dcb06988b5acb 100644
--- a/chrome/common/extensions/api/socket.idl
+++ b/chrome/common/extensions/api/socket.idl
@@ -102,6 +102,9 @@ namespace socket {
 
     // The available IPv4/6 address.
     DOMString address;
+
+    // The prefix length
+    long prefixLength;
   };
 
   callback RecvFromCallback = void (RecvFromInfo recvFromInfo);