dart2js: fix a few TODOs in the startup emitter.

pkg/compiler/lib/src/js_emitter/lazy_emitter/model_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.
 
 library dart2js.js_emitter.lazy_emitter.model_emitter;
 
 import '../../constants/values.dart' show ConstantValue, FunctionConstantValue;
 import '../../dart2jslib.dart' show Compiler;
 import '../../elements/elements.dart' show ClassElement, FunctionElement;
 import '../../js/js.dart' as js;
@@ skipping 217 matching lines @@
 
   Map<String, dynamic> nativeHoles(Program program) {
     Map<String, dynamic> nativeHoles = <String, dynamic>{};
 
     js.Statement nativeIsolateAffinityTagInitialization;
     if (NativeGenerator.needsIsolateAffinityTagInitialization(backend)) {
       nativeIsolateAffinityTagInitialization =
           NativeGenerator.generateIsolateAffinityTagInitialization(
               backend,
               generateEmbeddedGlobalAccess,
-              // TODO(floitsch): convertToFastObject.
+              // TODO(floitsch): internStringFunction.
               js.js("(function(x) { return x; })", []));
     } else {
       nativeIsolateAffinityTagInitialization = js.js.statement(";");
     }
     nativeHoles['nativeIsolateAffinityTagInitialization'] =
         nativeIsolateAffinityTagInitialization;
 
 
     js.Expression nativeInfoAccess = js.js('nativeInfo', []);
     js.Expression constructorAccess = js.js('constructor', []);
@@ skipping 989 matching lines @@
 
   var end = Date.now();
   // print('Setup: ' + (end - start) + ' ms.');
 
   #invokeMain;  // Start main.
 
 })(Date.now(), #code)
 }""";
 
 }