Second round of cleanups for new optional parameter semantics.

tests/standalone/io/web_socket_test.dart

Index: tests/standalone/io/web_socket_test.dart
===================================================================
--- tests/standalone/io/web_socket_test.dart	(revision 13712)
+++ tests/standalone/io/web_socket_test.dart	(working copy)
@@ -11,7 +11,7 @@
   HttpServer server = new HttpServer();
   HttpClient client = new HttpClient();
 
-  server.listen("127.0.0.1", 0, totalConnections);
+  server.listen("127.0.0.1", 0, backlog: totalConnections);
 
   // Create a web socket handler and set is as the HTTP server default
   // handler.
@@ -64,7 +64,7 @@
   HttpServer server = new HttpServer();
   HttpClient client = new HttpClient();
 
-  server.listen("127.0.0.1", 0, totalConnections);
+  server.listen("127.0.0.1", 0, backlog: totalConnections);
 
   // Create a web socket handler and set is as the HTTP server default
   // handler.
@@ -115,7 +115,7 @@
   HttpServer server = new HttpServer();
   HttpClient client = new HttpClient();
 
-  server.listen("127.0.0.1", 0, 1);
+  server.listen("127.0.0.1", 0, backlog: 1);
 
   // Create a web socket handler and set is as the HTTP server default
   // handler.
@@ -150,7 +150,7 @@
   HttpServer server = new HttpServer();
   HttpClient client = new HttpClient();
 
-  server.listen("127.0.0.1", 0, 5);
+  server.listen("127.0.0.1", 0, backlog: 5);
 
   // Create a server which always responds with a redirect.
   server.defaultRequestHandler = (request, response) {
@@ -173,7 +173,7 @@
   HttpServer server = new HttpServer();
   HttpClient client = new HttpClient();
 
-  server.listen("127.0.0.1", 0, 5);
+  server.listen("127.0.0.1", 0, backlog: 5);
 
   // Create a web socket handler and set is as the HTTP server default
   // handler.
@@ -204,7 +204,7 @@
   HttpClient client = new HttpClient();
   Map connections = new Map();
 
-  server.listen("127.0.0.1", 0, totalConnections);
+  server.listen("127.0.0.1", 0, backlog: totalConnections);
 
   void handleMessage(conn, message) {
     var info = connections[conn];
@@ -252,7 +252,7 @@
     int totalConnections, int closeStatus, String closeReason) {
   HttpServer server = new HttpServer();
 
-  server.listen("127.0.0.1", 0, totalConnections);
+  server.listen("127.0.0.1", 0, backlog: totalConnections);
 
   // Create a web socket handler and set is as the HTTP server default
   // handler.