Reorganize the dart2js transformer tests.

sdk/lib/_internal/pub/test/transformer/mode_defaults_to_release_in_build_test.dart

Index: sdk/lib/_internal/pub/test/transformer/mode_defaults_to_release_in_build_test.dart
diff --git a/sdk/lib/_internal/pub/test/transformer/mode_defaults_to_release_in_build_test.dart b/sdk/lib/_internal/pub/test/transformer/mode_defaults_to_release_in_build_test.dart
deleted file mode 100644
index 6fbc0b071b3011987d44893d5614791545a880ee..0000000000000000000000000000000000000000
--- a/sdk/lib/_internal/pub/test/transformer/mode_defaults_to_release_in_build_test.dart
+++ /dev/null
@@ -1,60 +0,0 @@
-// Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS d.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 pub_tests;
-
-import '../descriptor.dart' as d;
-import '../test_pub.dart';
-
-final transformer = """
-import 'dart:async';
-
-import 'package:barback/barback.dart';
-
-class ModeTransformer extends Transformer {
-  final BarbackSettings settings;
-
-  ModeTransformer.asPlugin(this.settings);
-
-  String get allowedExtensions => '.txt';
-
-  Future apply(Transform transform) {
-    return transform.primaryInput.readAsString().then((contents) {
-      transform.addOutput(
-          new Asset.fromString(transform.primaryInput.id, settings.mode.name));
-    });
-  }
-}
-""";
-
-main() {
-  initConfig();
-  integration("mode defaults to 'release' in pub build", () {
-    d.dir(appPath, [
-      d.pubspec({
-        "name": "myapp",
-        "transformers": ["myapp/src/transformer"]
-      }),
-      d.dir("lib", [d.dir("src", [
-        d.file("transformer.dart", transformer)
-      ])]),
-      d.dir("web", [
-        d.file("foo.txt", "foo")
-      ])
-    ]).create();
-
-    createLockFile('myapp', pkg: ['barback']);
-
-    schedulePub(args: ["build"],
-        output: new RegExp(r'Built 1 file to "build".'));
-
-    d.dir(appPath, [
-      d.dir('build', [
-        d.dir('web', [
-          d.file('foo.txt', 'release')
-        ])
-      ])
-    ]).validate();
-  });
-}