Update network service.

mojo/services/network/public/interfaces/network_service.mojom

Index: mojo/services/network/public/interfaces/network_service.mojom
diff --git a/mojo/services/network/public/interfaces/network_service.mojom b/mojo/services/network/public/interfaces/network_service.mojom
index 6467c7faba5f816296052a5b99509a1ac6127254..f8ab7e2779f3b5e4abff5d4bf065973b13a78be5 100644
--- a/mojo/services/network/public/interfaces/network_service.mojom
+++ b/mojo/services/network/public/interfaces/network_service.mojom
@@ -12,6 +12,7 @@ import "network/public/interfaces/tcp_bound_socket.mojom";
 import "network/public/interfaces/tcp_connected_socket.mojom";
 import "network/public/interfaces/udp_socket.mojom";
 import "network/public/interfaces/url_loader.mojom";
+import "network/public/interfaces/url_loader_interceptor.mojom";
 import "network/public/interfaces/web_socket.mojom";
 
 // TODO Darin suggests that this should probably be two classes. One for
@@ -72,4 +73,9 @@ interface NetworkService {
                    HttpServerDelegate delegate)
       => (NetworkError result,
           NetAddress? bound_to);
+
+  // Register a new url loader interceptor that will be used on any new
+  // URLLoader. Interceptor are chained. The last registed interceptor will
+  // received the requests first and the responses last.
+  RegisterURLLoaderInterceptor(URLLoaderInterceptorFactory factory);
 };