Dart: Removes need to call listen().

mojo/dart/test/validation_test.dart

 // Copyright 2015 The Chromium Authors. 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:async';
 import 'dart:convert';
 import 'dart:isolate';
 import 'dart:typed_data';
 import 'mojo:bindings';
 import 'mojo:builtin' as builtin;
 import 'mojo:core';
 
 import 'package:mojo/dart/testing/validation_test_input_parser.dart' as parser;
 import 'package:mojo/public/interfaces/bindings/tests/validation_test_interfaces.mojom.dart';
 
 class ConformanceTestInterfaceImpl implements ConformanceTestInterface {
   ConformanceTestInterfaceStub _stub;
   Completer _completer;
 
   ConformanceTestInterfaceImpl(this._completer,
       MojoMessagePipeEndpoint endpoint) {
-    _stub = new ConformanceTestInterfaceStub.fromEndpoint(endpoint, impl: this);
+    _stub = new ConformanceTestInterfaceStub.fromEndpoint(endpoint, this);
   }
 
   void _complete() => _completer.complete(null);
 
   method0(double param0) => _complete();
   method1(StructA param0) => _complete();
   method2(StructB param0, StructA param1) => _complete();
   method3(List<bool> param0) => _complete();
   method4(StructC param0, List<int> param1) => _complete();
   method5(StructE param0, MojoDataPipeProducer param1) => _complete();
@@ skipping 65 matching lines @@
 
   // First test the parser.
   parser.parserTests();
 
   // Then run the conformance tests.
   getTestFiles(path, "$path/conformance_").forEach((test) {
     runTest(test, readAndParseTest(test), expectedResult(test));
   });
   // TODO(zra): Add integration tests when they no longer rely on Client=.
 }