Add a function to get Wifi SSID to net_util.

net/base/net_util_win.cc

Index: net/base/net_util_win.cc
diff --git a/net/base/net_util_win.cc b/net/base/net_util_win.cc
index ec4023384c4c48699195cd51b3be7ed0506995e4..385e5fcf0ff5698b34ea43fb7b2d58b3421b6f80 100644
--- a/net/base/net_util_win.cc
+++ b/net/base/net_util_win.cc
@@ -320,4 +320,9 @@ scoped_ptr<ScopedWifiOptions> SetWifiOptions(int options) {
   return scoped_ptr<ScopedWifiOptions>(new WifiOptionSetter(options));
 }
 
+std::string GetWifiSSIDFromInterfaceList(const NetworkInterfaceList& networks) {
+  NOTIMPLEMENTED();
+  return "";
+}
+
 }  // namespace net