Revert "Revert "fix #27256, track type bounds for generic functions""

pkg/dev_compiler/tool/input_sdk/private/js_mirrors.dart

 // Copyright (c) 2015, 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 dart._js_mirrors;
 
 import 'dart:mirrors';
 import 'dart:_foreign_helper' show JS;
 import 'dart:_internal' as _internal;
 
@@ skipping 56 matching lines @@
 
 dynamic _getGenericClass(obj) {
   return JS('', '#.getGenericClass(#)', _dart, obj);
 }
 
 dynamic _getGenericArgs(obj) {
   return JS('', '#.getGenericArgs(#)', _dart, obj);
 }
 
 dynamic _defaultConstructorType(type) {
-  return JS('', '#.definiteFunctionType(#, [])', _dart, type);
+  return JS('', '#.fnType(#, [])', _dart, type);
 }
 
 dynamic _getMixins(type) {
   return JS('', '#.getMixins(#, [])', _dart, type);
 }
 
 dynamic _getFunctionType(type) {
   return JS('', '#.getFunctionTypeMirror(#)', _dart, type);
 }
 
@@ skipping 559 matching lines @@
       var param =
           new JsParameterMirror._(new Symbol(''), _wrap(type), metadata);
       params[i + args.length] = param;
     }
 
     _params = new List.unmodifiable(params);
   }
 
   String toString() => "MethodMirror on '$_name'";
 }