Add HTTP handler registration to the HTTP server

tests/standalone/src/io/HttpServerSocketTest.dart

Index: tests/standalone/src/io/HttpServerSocketTest.dart
diff --git a/tests/standalone/src/io/HttpServerSocketTest.dart b/tests/standalone/src/io/HttpServerSocketTest.dart
index d25481010c287fa91063efc7f802f83e90a38745..f3b59c4f940f08767c634ce4b3040d575626d5fd 100644
--- a/tests/standalone/src/io/HttpServerSocketTest.dart
+++ b/tests/standalone/src/io/HttpServerSocketTest.dart
@@ -172,12 +172,13 @@ void testSocketClose() {
     void runSettings(int cutoff,
                      bool closeAsError,
                      bool expectError) {
-      server.onRequest = (HttpRequest request, HttpResponse response) {
-        request.inputStream.onData = () {
-        };
-        request.inputStream.onClosed = () {
-          response.outputStream.close();
-        };
+      server.defaultRequestHandler =
+          (HttpRequest request, HttpResponse response) {
+            request.inputStream.onData = () {
+            };
+            request.inputStream.onClosed = () {
+              response.outputStream.close();
+            };
       };
 
       if (expectError) {