Add fields to platform library, implement them on runtime dart.

tests/lib/platform/number_of_processors_test.dart

Index: tests/lib/platform/number_of_processors_test.dart
diff --git a/tests/language/bootstrap_test.dart b/tests/lib/platform/number_of_processors_test.dart
similarity index 50%
copy from tests/language/bootstrap_test.dart
copy to tests/lib/platform/number_of_processors_test.dart
index 747dbf9e4bae1ff32d8597a228719fbe31a73d7c..043914d4c75cd7f5c7a5537b32565434a7fbbf0d 100644
--- a/tests/language/bootstrap_test.dart
+++ b/tests/lib/platform/number_of_processors_test.dart
@@ -1,19 +1,15 @@
 // Copyright (c) 2013, 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.
-// Dart test for testing binary operations.
-// VMOptions=--verify_implements  --check-function-fingerprints
 
-class BootstrapTest {
+import "dart:platform" as platform;
 
-  static testMain() {
-    var obj = new Object();
-
-    return obj;
-  }
-
-}
+import "package:unittest/unittest.dart";
 
 main() {
-  BootstrapTest.testMain();
+  if (platform.operatingSystem != null) {
+    expect(platform.numberOfProcessors, isPositive);
+  } else {
+    expect(platform.numberOfProcessors, isNull);
+  }
 }