Checked mode fixes.

dart/tests/try/web/incremental_compilation_update_test.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 trydart.incremental_compilation_update_test;
 
 import 'dart:html';
 
 import 'dart:async' show
     Future;
@@ skipping 988 matching lines @@
 ];
 
 void main() {
   listener.start();
 
   document.head.append(lineNumberStyle());
 
   return asyncTest(() => Future.forEach(tests, compileAndRun));
 }
 
+int testCount = 1;
+
 Future compileAndRun(List<ProgramResult> programs) {
   var status = new DivElement();
   document.body.append(status);
 
   IFrameElement iframe =
       appendIFrame(
           '/root_dart/tests/try/web/incremental_compilation_update.html',
           document.body)
           ..style.width = '100%'
           ..style.height = '600px';
 
   return listener.expect('iframe-ready').then((_) {
     ProgramResult program = programs.first;
 
 
-    status.append(new HeadingElement.h2()..appendText("Full program:"));
+    status.append(
+        new HeadingElement.h2()
+            ..appendText("Full program #${testCount++}:"));
     status.append(numberedLines(program.code));
 
     status.style.color = 'orange';
     WebCompilerTestCase test = new WebCompilerTestCase(program.code);
     return test.run().then((String jsCode) {
       status.style.color = 'red';
       var objectUrl =
           Url.createObjectUrl(new Blob([jsCode], 'application/javascript'));
 
       iframe.contentWindow.postMessage(['add-script', objectUrl], '*');
@@ skipping 80 matching lines @@
   position: absolute;
   left: 0px;
   width: 3em;
   text-align: right;
   background-color: lightgoldenrodyellow;
 }
 ''');
   style.type = 'text/css';
   return style;
 }