fix a few more codegen issues:

test/browser/language_tests.js

 // 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.
 
 (function() {
   'use strict';
 
   let _isolate_helper = dart_library.import('dart/_isolate_helper');
   _isolate_helper.startRootIsolate(function() {}, []);
   let async_helper = dart_library.import('async_helper/async_helper');
@@ skipping 17 matching lines @@
             testCase = (testCase < 10 ? '0' : '') + testCase;
           }
           dartLanguageTest(`${multitestName}_${testCase}_multi`);
         }
       } else {
         dartLanguageTest(name);
       }
     }
   }
 
-  suite('scoping', () => {
+  suite('scopes and names', () => {
     dartLanguageTests([
       'implicit_scope_test',
-      ['built_in_identifier_test', 'none', 1]
+      ['built_in_identifier_test', 'none', 1],
+      'naming3_test'
     ]);
   });
 
+  suite('strings', () => {
+    dartLanguageTests(['optimized_string_charcodeat_test']);
+  });
+
   suite('method binding', () => {
     dartLanguageTests([
       ['super_bound_closure_test', 'none'],
       'method_binding_test'
     ]);
   });
 
   suite('dynamic type literal', () => {
     dartLanguageTests([
       ['const_dynamic_type_literal_test', 'none', 1, 3]
@@ skipping 82 matching lines @@
       'export_main_override_test',
       'export_main_test',
       'export_test',
       'local_export_test',
       'reexport_core_test',
       'top_level_entry_test'
     ]);
   });
 
 })();