Fix test.dart tests.

tests/standalone/io/skipping_dart2js_compilations_test.dart

Index: tests/standalone/io/skipping_dart2js_compilations_test.dart
diff --git a/tests/standalone/io/skipping_dart2js_compilations_test.dart b/tests/standalone/io/skipping_dart2js_compilations_test.dart
index 3f22a8461d3fffe0c6be61cf0cd4c1b9b52922e5..d027b7d8653a54004d66ae358c0b5202b0ec8e20 100644
--- a/tests/standalone/io/skipping_dart2js_compilations_test.dart
+++ b/tests/standalone/io/skipping_dart2js_compilations_test.dart
@@ -20,6 +20,7 @@ import 'package:expect/expect.dart';
 import 'package:path/path.dart';
 import 'dart:async';
 import 'dart:io';
+import '../../../tools/testing/dart/command.dart';
 import '../../../tools/testing/dart/options.dart' as options;
 import '../../../tools/testing/dart/path.dart';
 import '../../../tools/testing/dart/test_runner.dart' as runner;
@@ -154,13 +155,8 @@ runner.Command makeCompilationCommand(String testName, FileUtils fileUtils) {
   var executable = Platform.executable;
   var arguments = [createFileScript, fileUtils.scriptOutputPath.toNativePath()];
   var bootstrapDeps = [Uri.parse("file://${fileUtils.testSnapshotFilePath}")];
-  return runner.CommandBuilder.instance.getCompilationCommand(
-      'dart2js',
-      fileUtils.testJsFilePath.toNativePath(),
-      false,
-      bootstrapDeps,
-      executable,
-      arguments, {});
+  return Command.compilation('dart2js', fileUtils.testJsFilePath.toNativePath(),
+      false, bootstrapDeps, executable, arguments, {});
 }
 
 void main() {