Fix Ping Pong snapshot test

runtime/vm/snapshot_test.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.
 
 #import("dart:isolate");
 
 class Fields {
   Fields(int i, int j) : fld1 = i, fld2 = j, fld5 = true {}
   int fld1;
   final int fld2;
@@ skipping 1068 matching lines @@
     return _opsms / _run;
   }
 
   static void init() {
     _run = 0;
     _opsms = 0.0;
   }
 
   static void main() {
     init();
-    PingPongGame pingPongGame = new PingPongGame.play();
+    PingPongGame pingPongGame = new PingPongGame();
   }
 
   static var _run;
   static var _opsms;
 }
 
 class PingPongGame {
 
-  PingPongGame.play()
+  PingPongGame()
       : _ping = new ReceivePort(),
         _pingPort = _ping.toSendPort(),
         _pong = null,
         _warmedup = false,
         _iterations = 0 {
     SendPort _pong = spawnFunction(pong);
     play();
   }
 
   void startRound() {
     _iterations++;
     _pong.send(Benchmark1.INIT_MESSAGE, _pingPort);
   }
 
   void evaluateRound() {
     int time = (new Date.now().difference(_start)).inMilliseconds;
     if (!_warmedup && time < Benchmark1.WARMUP_TIME) {
       startRound();
     } else if (!_warmedup) {
       _warmedup = true;
       _start = new Date.now();
       _iterations = 0;
       startRound();
     } else if (_warmedup && time < Benchmark1.RUN_TIME) {
       startRound();
     } else {
       shutdown();
       Benchmark1.add_result((1.0 * _iterations * Benchmark1.MESSAGES) / time);
       if (Benchmark1.run() < Benchmark1.RUNS) {
-        new PingPongGame.play();
+        new PingPongGame();
       } else {
         print("PingPong: ", Benchmark1.get_result());
       }
     }
   }
 
   void play() {
     _ping.receive((int message, SendPort replyTo) {
       if (message < Benchmark1.MESSAGES) {
         _pong.send(++message, null);
@@ skipping 409 matching lines @@
 void processLines() {
   port.receive((message, SendPort replyTo) {
     if (message == TERMINATION_MESSAGE) {
       assert(replyTo == null);
       port.close();
     } else {
       replyTo.send(processLine(message), null);
     }
   });
 }