Avoid spurious "The compiler crashed" messages in batch mode.

tests/compiler/dart2js/dart2js_batch2_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.
 
 import 'dart:async';
 import 'dart:convert';
 import 'dart:io';
 
 import 'package:path/path.dart' as path;
 import 'package:async_helper/async_helper.dart';
@@ skipping 19 matching lines @@
   return Directory.systemTemp
       .createTemp('dart2js_batch_test-')
       .then((Directory dir) {
     return dir;
   });
 }
 
 Future setup() {
   return createTempDir().then((Directory directory) {
     tmpDir = directory;
-    Directory sunflowerDir = new Directory.fromUri(
-        Platform.script.resolve('../../../third_party/sunflower'));
-
-    print("Copying '${sunflowerDir.path}' to '${tmpDir.path}'.");
-    copyDirectory(sunflowerDir, tmpDir);
+    String newPath = path.join(directory.path, "dart2js_batch2_run.dart");
+    File source =
+        new File(Platform.script.resolve("dart2js_batch2_run.dart").path);
+    source.copySync(newPath);
   });
 }
 
 void cleanUp() {
   print("Deleting '${tmpDir.path}'.");
   tmpDir.deleteSync(recursive: true);
 }
 
 Future launchDart2Js(_) {
   String ext = Platform.isWindows ? '.bat' : '';
   String command =
       path.normalize(path.join(path.fromUri(Platform.script),
                     '../../../../sdk/bin/dart2js${ext}'));
   print("Running '$command --batch' from '${tmpDir}'.");
   return Process.start(command, ['--batch'], workingDirectory: tmpDir.path);
 }
 
 Future runTests(Process process) {
-  String inFile = path.join(tmpDir.path, 'web/sunflower.dart');
+  String inFile = path.join(tmpDir.path, 'dart2js_batch2_run.dart');
   String outFile = path.join(tmpDir.path, 'out.js');
-  String outFile2 = path.join(tmpDir.path, 'out2.js');
 
   process.stdin.writeln('--out="$outFile" "$inFile"');
-  process.stdin.writeln('--out="$outFile2" "$inFile"');
-  process.stdin.writeln('too many arguments');
-  process.stdin.writeln(r'"non existing file.dart"');
   process.stdin.close();
   Future<String> output = process.stdout.transform(UTF8.decoder).join();
   Future<String> errorOut = process.stderr.transform(UTF8.decoder).join();
   return Future.wait([output, errorOut])
         .then((result) {
       String stdoutOutput = result[0];
-      print('out:\n$stdoutOutput');
       String stderrOutput = result[1];
-      print('err:\n$stderrOutput');
 
-      Expect.equals(4, ">>> EOF STDERR".allMatches(stderrOutput).length);
-      Expect.equals(4, ">>>".allMatches(stderrOutput).length);
-
-      Expect.equals(2, ">>> TEST OK".allMatches(stdoutOutput).length);
-      Expect.equals(2, ">>> TEST FAIL".allMatches(stdoutOutput).length);
-      Expect.equals(4, ">>>".allMatches(stdoutOutput).length);
+      Expect.isFalse(stdoutOutput.contains("crashed"));
     });
 }
 
 void main() {
   var tmpDir;
   asyncTest(() {
     return setup()
         .then(launchDart2Js)
         .then(runTests)
         .whenComplete(cleanUp);
   });
 }