Fix names in named parameter lists

lib/src/codegen/js_codegen.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 dev_compiler.src.codegen.js_codegen;
 
 import 'dart:collection' show HashSet, HashMap;
 
 import 'package:analyzer/analyzer.dart' hide ConstantEvaluator;
 import 'package:analyzer/src/generated/ast.dart' hide ConstantEvaluator;
@@ skipping 1166 matching lines @@
   JS.ArrayInitializer _emitTypeNames(List<DartType> types,
       {dynamicIsBottom: false}) {
     var build = (t) => _emitTypeName(t, dynamicIsBottom: dynamicIsBottom);
     return new JS.ArrayInitializer(types.map(build).toList());
   }
 
   JS.ObjectInitializer _emitTypeProperties(Map<String, DartType> types,
       {dynamicIsBottom: false}) {
     var properties = <JS.Property>[];
     types.forEach((name, type) {
-      var key = new JS.LiteralString(name);
+      var key = _propertyName(name);
       var value = _emitTypeName(type, dynamicIsBottom: dynamicIsBottom);
       properties.add(new JS.Property(key, value));
     });
     return new JS.ObjectInitializer(properties);
   }
 
   /// Emit the pieces of a function type, as an array of return type,
   /// regular args, and optional/named args.
   /// If [dynamicIsBottom] is true, then dynamics in argument positions
   /// will be lowered to bottom instead of Object.
@@ skipping 1414 matching lines @@
 
 /// A special kind of element created by the compiler, signifying a temporary
 /// variable. These objects use instance equality, and should be shared
 /// everywhere in the tree where they are treated as the same variable.
 class TemporaryVariableElement extends LocalVariableElementImpl {
   TemporaryVariableElement.forNode(Identifier name) : super.forNode(name);
 
   int get hashCode => identityHashCode(this);
   bool operator ==(Object other) => identical(this, other);
 }