If GetNetworkList fails, don't push down an empty network list.

content/browser/renderer_host/p2p/socket_dispatcher_host.cc

Index: content/browser/renderer_host/p2p/socket_dispatcher_host.cc
diff --git a/content/browser/renderer_host/p2p/socket_dispatcher_host.cc b/content/browser/renderer_host/p2p/socket_dispatcher_host.cc
index f044331e9229431ce1285d782be01c8553a99007..1204067792468b72da8aa60e720444f13df1335d 100644
--- a/content/browser/renderer_host/p2p/socket_dispatcher_host.cc
+++ b/content/browser/renderer_host/p2p/socket_dispatcher_host.cc
@@ -334,7 +334,10 @@ void P2PSocketDispatcherHost::OnDestroySocket(int socket_id) {
 
 void P2PSocketDispatcherHost::DoGetNetworkList() {
   net::NetworkInterfaceList list;
-  net::GetNetworkList(&list, net::EXCLUDE_HOST_SCOPE_VIRTUAL_INTERFACES);
+  if (!net::GetNetworkList(&list, net::EXCLUDE_HOST_SCOPE_VIRTUAL_INTERFACES)) {
+    LOG(ERROR) << "GetNetworkList failed.";
+    return;
+  }
   default_ipv4_local_address_ = GetDefaultLocalAddress(AF_INET);
   default_ipv6_local_address_ = GetDefaultLocalAddress(AF_INET6);
   BrowserThread::PostTask(