Disable closure wrapping by default

test/dart_codegen/expect/convert/string_conversion.dart

Index: test/dart_codegen/expect/convert/string_conversion.dart
diff --git a/test/dart_codegen/expect/convert/string_conversion.dart b/test/dart_codegen/expect/convert/string_conversion.dart
index eddacddaa98c1a1283e2282fdbf2d99d80abc9f7..a40b44641d062df1855455ed17bb2d3f93256c9e 100644
--- a/test/dart_codegen/expect/convert/string_conversion.dart
+++ b/test/dart_codegen/expect/convert/string_conversion.dart
@@ -46,14 +46,14 @@ if (_buffer.isNotEmpty) _flush();
  Iterator iterator = objects.iterator;
  if (!iterator.moveNext()) return; if (separator.isEmpty) {
 do {
-_chunkedSink.add(((__x26) => DEVC$RT.cast(__x26, dynamic, String, "DynamicCast", """line 147, column 26 of dart:convert/string_conversion.dart: """, __x26 is String, true))(iterator.current.toString()));
+_chunkedSink.add(((__x22) => DEVC$RT.cast(__x22, dynamic, String, "DynamicCast", """line 147, column 26 of dart:convert/string_conversion.dart: """, __x22 is String, true))(iterator.current.toString()));
 }
  while (iterator.moveNext());}
  else {
-_chunkedSink.add(((__x27) => DEVC$RT.cast(__x27, dynamic, String, "DynamicCast", """line 150, column 24 of dart:convert/string_conversion.dart: """, __x27 is String, true))(iterator.current.toString()));
+_chunkedSink.add(((__x23) => DEVC$RT.cast(__x23, dynamic, String, "DynamicCast", """line 150, column 24 of dart:convert/string_conversion.dart: """, __x23 is String, true))(iterator.current.toString()));
  while (iterator.moveNext()) {
 write(separator);
- _chunkedSink.add(((__x28) => DEVC$RT.cast(__x28, dynamic, String, "DynamicCast", """line 153, column 26 of dart:convert/string_conversion.dart: """, __x28 is String, true))(iterator.current.toString()));
+ _chunkedSink.add(((__x24) => DEVC$RT.cast(__x24, dynamic, String, "DynamicCast", """line 153, column 26 of dart:convert/string_conversion.dart: """, __x24 is String, true))(iterator.current.toString()));
 }
 }
 }