dart2js: Fix encoding of field names in csp mode.

pkg/compiler/lib/src/js_emitter/old_emitter/emitter.dart

 // Copyright (c) 2014, 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.
 
 part of dart2js.js_emitter;
 
 
 class OldEmitter implements Emitter {
   final Compiler compiler;
   final CodeEmitterTask task;
@@ skipping 1008 matching lines @@
                                       jsAst.Name constructorName,
                                       jsAst.Expression constructorAst,
                                       List<jsAst.Name> fields) {
     cspPrecompiledFunctionFor(outputUnit).add(
         new jsAst.FunctionDeclaration(constructorName, constructorAst));
 
     String fieldNamesProperty = FIELD_NAMES_PROPERTY_NAME;
     bool hasIsolateSupport = compiler.hasIsolateSupport;
     jsAst.Node fieldNamesArray;
     if (hasIsolateSupport) {
-      fieldNamesArray = js.concatenateStrings(
-          js.joinLiterals(fields, js.stringPart(",")),
-          addQuotes: true);
+      fieldNamesArray =
+          new jsAst.ArrayInitializer(fields.map(js.quoteName).toList());
     } else {
       fieldNamesArray = new jsAst.LiteralNull();
     }
 
     cspPrecompiledFunctionFor(outputUnit).add(js.statement(r'''
         {
           #constructorName.#typeNameProperty = #constructorNameString;
           // IE does not have a name property.
           if (!("name" in #constructorName))
               #constructorName.name = #constructorNameString;
@@ skipping 965 matching lines @@
     for (Element element in compiler.enqueuer.codegen.newlyEnqueuedElements) {
       if (element.isInstanceMember) {
         cachedClassBuilders.remove(element.enclosingClass);
 
         nativeEmitter.cachedBuilders.remove(element.enclosingClass);
 
       }
     }
   }
 }