Add retail logging for WebRTC IP permission debugability

content/renderer/media/webrtc/peer_connection_dependency_factory.cc

Index: content/renderer/media/webrtc/peer_connection_dependency_factory.cc
diff --git a/content/renderer/media/webrtc/peer_connection_dependency_factory.cc b/content/renderer/media/webrtc/peer_connection_dependency_factory.cc
index 802de16b7d2666e9781efbbb5bbeb0a85edabc13..1c721b5e384cfc2bdea32ef9abc8fadb2638d214 100644
--- a/content/renderer/media/webrtc/peer_connection_dependency_factory.cc
+++ b/content/renderer/media/webrtc/peer_connection_dependency_factory.cc
@@ -477,8 +477,13 @@ PeerConnectionDependencyFactory::CreatePeerConnection(
   }
 
   if (!enforce_preferences) {
+    VLOG(3) << "WebRTC routing preferences will not be enforced";
     port_config.enable_multiple_routes = true;
     port_config.enable_nonproxied_udp = true;
+  } else {
+    VLOG(3) << "WebRTC routing preferences: multiple_routes: "
+            << port_config.enable_multiple_routes
+            << ", nonproxied_udp: " << port_config.enable_nonproxied_udp;
   }
 
   const GURL& requesting_origin =