Merge kernel closure conversion into the Dart SDK

pkg/kernel/bin/batch_util.dart

 // Copyright (c) 2016, 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 kernel.batch_util;
 
 import 'dart:async';
 import 'dart:convert';
 import 'dart:io';
 
-enum CompilerOutcome { Ok, Fail, }
+enum CompilerOutcome {
+  Ok,
+  Fail,
+}
 
 typedef Future<CompilerOutcome> BatchCallback(List<String> arguments);
 
 /// Runs the given [callback] in the batch mode for use by the test framework in
 /// `dart-lang/sdk`.
 ///
 /// The [callback] should behave as a main method, except it should return a
 /// [CompilerOutcome] for reporting its outcome to the testing framework.
 Future runBatch(BatchCallback callback) async {
   int totalTests = 0;
@@ skipping 19 matching lines @@
         print('>>> TEST FAIL ${watch.elapsedMilliseconds}ms');
       }
     } catch (e, stackTrace) {
       stderr.writeln(e);
       stderr.writeln(stackTrace);
       stderr.writeln('>>> EOF STDERR');
       print('>>> TEST CRASH');
     }
   }
 }