Pull args, intl, logging, shelf, and source_maps out of the SDK.

pkg/intl/test/message_extraction/failed_extraction_test.dart

-// Copyright (c) 2014, 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 failed_extraction_test;
-
-import "message_extraction_test.dart";
-import "dart:io";
-import "package:unittest/unittest.dart";
-
-main() {
-  test("Expect warnings but successful extraction", () {
-    runTestWithWarnings(warningsAreErrors: false, expectedExitCode: 0);
-  });
-}
-
-const defaultFiles =
-    const ["sample_with_messages.dart", "part_of_sample_with_messages.dart"];
-
-void runTestWithWarnings({bool warningsAreErrors, int expectedExitCode,
-  bool embeddedPlurals: true, List<String> sourceFiles: defaultFiles}) {
-
-  void verify(ProcessResult result) {
-    try {
-      expect(result.exitCode, expectedExitCode);
-    } finally {
-      deleteGeneratedFiles();
-    }
-  }
-
-  copyFilesToTempDirectory();
-  var program = asTestDirPath("../../bin/extract_to_arb.dart");
-  var args = ["--output-dir=$tempDir"];
-  if (warningsAreErrors) {
-    args.add('--warnings-are-errors');
-  }
-  if (!embeddedPlurals) {
-    args.add('--no-embedded-plurals');
-  }
-  var files = sourceFiles.map(asTempDirPath).toList();
-  var allArgs = [program]
-      ..addAll(args)
-      ..addAll(files);
-  var callback = expectAsync(verify);
-  run(null, allArgs).then(callback);
-}