Moved the testing scripts to the new import/library/part syntax

tools/testing/dart/http_server.dart

 // Copyright (c) 2012, 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.
 
-#library('http_server');
+library http_server;
 
-#import('dart:io');
-#import('dart:isolate');
-#import('test_suite.dart');  // For TestUtils.
+import 'dart:io';
+import 'dart:isolate';
+import 'test_suite.dart';  // For TestUtils.
 
 HttpServer _httpServer;
 
 void startHttpServer(String host, int port) {
   var basePath = TestUtils.dartDir();
   _httpServer = new HttpServer();
   _httpServer.onError = (e) {
     // Consider errors in the builtin http server fatal.
     // Intead of just throwing the exception we print
     // a message that makes it clearer what happened.
@@ skipping 21 matching lines @@
       });
     }
   };
 
   _httpServer.listen(host, port);
 }
 
 terminateHttpServer() {
   if (_httpServer != null) _httpServer.close();
 }