Change handling of accepting socket connections

tests/standalone/src/SocketCloseTest.dart

 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 //
 // Test socket close events.
 
 
 final SERVERSHUTDOWN = -1;
 final ITERATIONS = 10;
 
@@ skipping 191 matching lines @@
 }
 
 class SocketCloseServer extends Isolate {
 
   static final HOST = "127.0.0.1";
 
   SocketCloseServer() : super() {}
 
   void main() {
 
-    void connectionHandler() {
-      Socket _client;
+    void connectionHandler(Socket connection) {
 
       void dataHandler() {
         _dataEvents++;
         switch (_mode) {
           case 0:
             Expect.fail("No data expected");
             break;
           case 1:
             List<int> b = new List<int>(100);
-            _client.readList(b, 0, 100);
+            connection.readList(b, 0, 100);
             break;
           case 2:
             List<int> b = new List<int>(100);
-            _client.readList(b, 0, 100);
-            _client.close();
+            connection.readList(b, 0, 100);
+            connection.close();
             break;
           case 3:
             List<int> b = new List<int>(100);
-            _client.readList(b, 0, 100);
-            _client.writeList("Hello".charCodes(), 0, 5);
-            _client.close();
+            connection.readList(b, 0, 100);
+            connection.writeList("Hello".charCodes(), 0, 5);
+            connection.close();
             break;
           case 4:
             List<int> b = new List<int>(100);
-            _client.readList(b, 0, 100);
-            _client.writeList("Hello".charCodes(), 0, 5);
+            connection.readList(b, 0, 100);
+            connection.writeList("Hello".charCodes(), 0, 5);
             break;
           case 5:
           case 6:
             List<int> b = new List<int>(100);
-            _client.readList(b, 0, 100);
-            _client.writeList("Hello".charCodes(), 0, 5);
-            _client.close(true);
+            connection.readList(b, 0, 100);
+            connection.writeList("Hello".charCodes(), 0, 5);
+            connection.close(true);
             break;
           default:
             Expect.fail("Unknown test mode");
         }
       }
 
       void closeHandler() {
         _closeEvents++;
-        _client.close();
+        connection.close();
       }
 
       void errorHandler() {
         Expect.fail("Socket error");
       }
 
-      _client = _server.accept();
       _iterations++;
 
-      _client.dataHandler = dataHandler;
-      _client.closeHandler = closeHandler;
-      _client.errorHandler = errorHandler;
+      connection.dataHandler = dataHandler;
+      connection.closeHandler = closeHandler;
+      connection.errorHandler = errorHandler;
     }
 
     void errorHandlerServer() {
       Expect.fail("Server socket error");
     }
 
     waitForResult(Timer timer) {
       // Make sure all iterations have been run. For mode 0 and 1 the
       // client just closes the socket and after the last iteration
       // signals the server. The server might now be finished just
@@ skipping 56 matching lines @@
   int _dataEvents;
   int _closeEvents;
   int _iterations;
   int _mode;
 }
 
 
 main() {
   SocketCloseTest.testMain();
 }