Treat Object and dynamic similarly

test/dart_codegen/expect/convert/json.dart

 part of dart.convert;
  class JsonUnsupportedObjectError extends Error {final unsupportedObject;
  final cause;
  JsonUnsupportedObjectError(this.unsupportedObject, {
   this.cause}
 );
  String toString() {
   if (cause != null) {
     return "Converting object to an encodable object failed.";
     }
@@ skipping 176 matching lines @@
 if (!_isDone) {
 _isDone = true;
  _sink.close();
 }
 }
 }
  class JsonDecoder extends Converter<String, Object> {final _Reviver _reviver;
  const JsonDecoder([reviver(var key, var value)]) : this._reviver = reviver;
  dynamic convert(String input) => _parseJson(input, _reviver);
  external StringConversionSink startChunkedConversion(Sink<Object> sink);
- Stream<Object> bind(Stream<String> stream) => ((__x17) => DEVC$RT.cast(__x17, DEVC$RT.type((DDC$async$.Stream<dynamic> _) {
-}
-), DEVC$RT.type((DDC$async$.Stream<Object> _) {
-}
-), "CastDynamic", """line 507, column 49 of dart:convert/json.dart: """, __x17 is DDC$async$.Stream<Object>, true))(super.bind(stream));
+ Stream<Object> bind(Stream<String> stream) => super.bind(stream);
 }
  external _parseJson(String source, reviver(key, value)) ;
  Object _defaultToEncodable(object) => object.toJson();
  abstract class _JsonStringifier {static const int BACKSPACE = 0x08;
  static const int TAB = 0x09;
  static const int NEWLINE = 0x0a;
  static const int CARRIAGE_RETURN = 0x0d;
  static const int FORM_FEED = 0x0c;
  static const int QUOTE = 0x22;
  static const int CHAR_0 = 0x30;
  static const int BACKSLASH = 0x5c;
  static const int CHAR_b = 0x62;
  static const int CHAR_f = 0x66;
  static const int CHAR_n = 0x6e;
  static const int CHAR_r = 0x72;
  static const int CHAR_t = 0x74;
  static const int CHAR_u = 0x75;
  final List _seen = new List();
  final Function _toEncodable;
- _JsonStringifier(Object _toEncodable(Object o)) : _toEncodable = ((__x18) => DEVC$RT.cast(__x18, dynamic, Function, "CastGeneral", """line 547, column 24 of dart:convert/json.dart: """, __x18 is Function, true))((_toEncodable != null) ? _toEncodable : _defaultToEncodable);
+ _JsonStringifier(Object _toEncodable(Object o)) : _toEncodable = ((__x17) => DEVC$RT.cast(__x17, dynamic, Function, "CastGeneral", """line 547, column 24 of dart:convert/json.dart: """, __x17 is Function, true))((_toEncodable != null) ? _toEncodable : _defaultToEncodable);
  void writeString(String characters);
  void writeStringSlice(String characters, int start, int end);
  void writeCharCode(int charCode);
  void writeNumber(num number);
  static int hexDigit(int x) => x < 10 ? 48 + x : 87 + x;
  void writeStringContent(String s) {
 int offset = 0;
  final int length = s.length;
  for (int i = 0; i < length; i++) {
 int charCode = s.codeUnitAt(i);
@@ skipping 109 matching lines @@
  for (int i = 1; i < list.length; i++) {
 writeString(',');
  writeObject(list[i]);
 }
 }
  writeString(']');
 }
  void writeMap(Map<String, Object> map) {
 writeString('{');
  String separator = '"';
- map.forEach(((__x27) => DEVC$RT.wrap((dynamic f(String __u19, dynamic __u20)) {
+ map.forEach(((__x26) => DEVC$RT.wrap((dynamic f(String __u18, dynamic __u19)) {
 dynamic c(String x0, dynamic x1) => f(x0, x1);
  return f == null ? null : c;
 }
-, __x27, __t24, __t21, "WrapLiteral", """line 721, column 17 of dart:convert/json.dart: """, __x27 is __t21))((String key, value) {
+, __x26, __t23, __t20, "WrapLiteral", """line 721, column 17 of dart:convert/json.dart: """, __x26 is __t20))((String key, value) {
 writeString(separator);
  separator = ',"';
  writeStringContent(key);
  writeString('":');
  writeObject(value);
 }
 ));
  writeString('}');
 }
 }
@@ skipping 193 matching lines @@
 for (int i = 0; i < indentLength; i++) {
 writeByte(indent[i]);
 }
 }
 }
 }
 }
  typedef Object __t7(Object __u8);
  typedef dynamic __t9(dynamic __u10);
  typedef dynamic __t13(Object __u14);
- typedef void __t21(String __u22, Object __u23);
- typedef dynamic __t24(String __u25, dynamic __u26);
+ typedef void __t20(String __u21, Object __u22);
+ typedef dynamic __t23(String __u24, dynamic __u25);