Add support for default local address in IpcNetworkManager

content/renderer/p2p/empty_network_manager.cc

Index: content/renderer/p2p/empty_network_manager.cc
diff --git a/content/renderer/p2p/empty_network_manager.cc b/content/renderer/p2p/empty_network_manager.cc
index 445f877714921da0124d8550de6b6047c49e4208..f24a75a091cceb8781d600a7011a9297ffd0265b 100644
--- a/content/renderer/p2p/empty_network_manager.cc
+++ b/content/renderer/p2p/empty_network_manager.cc
@@ -12,7 +12,8 @@
 
 namespace content {
 
-EmptyNetworkManager::EmptyNetworkManager() : weak_ptr_factory_(this) {
+EmptyNetworkManager::EmptyNetworkManager(rtc::NetworkManager* network_manager)
+    : network_manager_(network_manager), weak_ptr_factory_(this) {
   thread_checker_.DetachFromThread();
   set_enumeration_permission(ENUMERATION_BLOCKED);
 }
@@ -37,6 +38,12 @@ void EmptyNetworkManager::GetNetworks(NetworkList* networks) const {
   networks->clear();
 }
 
+bool EmptyNetworkManager::GetDefaultLocalAddress(
+    int family,
+    rtc::IPAddress* ipaddress) const {
+  return network_manager_->GetDefaultLocalAddress(family, ipaddress);
+}
+
 void EmptyNetworkManager::FireEvent() {
   if (!updating_started_)
     ReportIPPermissionStatus(PERMISSION_NOT_REQUESTED);