Fix type error.

dart/lib/compiler/implementation/native_handler.dart

 // Copyright (c) 2012, 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('native');
 #import('dart:uri');
 #import('leg.dart');
 #import('elements/elements.dart');
 #import('scanner/scannerlib.dart');
 #import('ssa/ssa.dart');
@@ skipping 42 matching lines @@
         classElement.ensureResolved(compiler);
         // Add the information that this class is a subtype of
         // its supertypes. The code emitter and the ssa builder use that
         // information.
         addSubtypes(classElement, emitter.nativeEmitter);
       }
     }
   }
   if (hasNativeClass) {
     final worlds = [compiler.enqueuer.resolution, compiler.enqueuer.codegen];
-    for (Universe world in worlds) {
+    for (var world in worlds) {
       world.registerStaticUse(compiler.findHelper(
           const SourceString('dynamicFunction')));
       world.registerStaticUse(compiler.findHelper(
           const SourceString('dynamicSetMetadata')));
       world.registerStaticUse(compiler.findHelper(
           const SourceString('defineProperty')));
       world.registerStaticUse(compiler.findHelper(
           const SourceString('toStringForNativeObject')));
     }
   }
@@ skipping 276 matching lines @@
                                       String parameters) {
   buffer.add("  if (Object.getPrototypeOf(this).hasOwnProperty");
   buffer.add("('$methodName')) {\n");
   buffer.add("  $code");
   buffer.add("  } else {\n");
   buffer.add("    return Object.prototype.$methodName.call(this");
   buffer.add(parameters == '' ? '' : ', $parameters');
   buffer.add(");\n");
   buffer.add("  }\n");
 }