Make GetNetworkList on Windows filter out 'down' interfaces, as on POSIX.

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 0455dab3cfaf1a9d2a27c032963a983c56db80fe..e256e4345489620cb44837be119104efca19e443 100644
--- a/net/base/net_util_win.cc
+++ b/net/base/net_util_win.cc
@@ -105,6 +105,10 @@ bool GetNetworkList(NetworkInterfaceList* networks) {
       continue;
     }
 
+    if (adapter->OperStatus != IfOperStatusUp) {
+      continue;
+    }
+
     IP_ADAPTER_UNICAST_ADDRESS* address;
     for (address = adapter->FirstUnicastAddress; address != NULL;
          address = address->Next) {

[wtc, 2012/02/17 19:36:23]

Comparing this code with the GetNetworkList function for
POSIX, I still see two differences.

1. The POSIX code says "Skip interfaces with no address
configured".  I suspect that is handled by this for loop's
termination condition (address != NULL).

2. The POSIX code says "Skip loopback addresses configured
on non-loopback interfaces."  There is no equivalent code
here.  I am not sure if a non-loopback network interface
may have a loopback address configured though.

wez added that code in http://codereview.chromium.org/7612012.
You can ask him if it's necessary or just defensive
programming.