Merge kernel closure conversion into the Dart SDK

pkg/kernel/bin/transform.dart

Index: pkg/kernel/bin/transform.dart
diff --git a/pkg/kernel/bin/transform.dart b/pkg/kernel/bin/transform.dart
index 680a760566ad92a1eb001fa5810c2583a1b2c02f..37f183809e023d132d1ba30064b7becdee4a37fa 100755
--- a/pkg/kernel/bin/transform.dart
+++ b/pkg/kernel/bin/transform.dart
@@ -12,6 +12,7 @@ import 'package:kernel/kernel.dart';
 import 'package:kernel/transformations/continuation.dart' as cont;
 import 'package:kernel/transformations/infer_values.dart' as infer_values;
 import 'package:kernel/transformations/mixin_full_resolution.dart' as mix;
+import 'package:kernel/transformations/closure_conversion.dart' as closures;
 import 'package:kernel/transformations/treeshaker.dart' as treeshaker;
 
 import 'batch_util.dart';
@@ -72,6 +73,9 @@ Future<CompilerOutcome> runTransformation(List<String> arguments) async {
     case 'resolve-mixins':
       program = mix.transformProgram(program);
       break;
+    case 'closures':
+      program = closures.transformProgram(program);
+      break;
     case 'treeshake':
       program = treeshaker.transformProgram(program);
       break;