dart2js: Use is-checks from the model in the old emitter.

pkg/compiler/lib/src/js_emitter/old_emitter/type_test_emitter.dart

Index: pkg/compiler/lib/src/js_emitter/old_emitter/type_test_emitter.dart
diff --git a/pkg/compiler/lib/src/js_emitter/old_emitter/type_test_emitter.dart b/pkg/compiler/lib/src/js_emitter/old_emitter/type_test_emitter.dart
deleted file mode 100644
index af0bd0ccbf0f6d07623f23f801679604cec7cf3a..0000000000000000000000000000000000000000
--- a/pkg/compiler/lib/src/js_emitter/old_emitter/type_test_emitter.dart
+++ /dev/null
@@ -1,18 +0,0 @@
-// Copyright (c) 2013, 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.
-
-part of dart2js.js_emitter;
-
-class TypeTestEmitter extends CodeEmitterHelper {
-  void emitIsTests(ClassElement classElement, ClassBuilder builder) {
-    assert(builder.functionType == null);
-    TypeTestGenerator generator =
-        new TypeTestGenerator(compiler, emitter.task, namer);
-    TypeTestProperties typeTests = generator.generateIsTests(classElement);
-    typeTests.properties.forEach(builder.addProperty);
-    if (typeTests.functionTypeIndex != null) {
-      builder.functionType = '${typeTests.functionTypeIndex}';
-    }
-  }
-}