Deprecate Math object in corelib in favor of dart:math library.

samples/swarm/swarmlib.dart

Index: samples/swarm/swarmlib.dart
diff --git a/samples/swarm/swarmlib.dart b/samples/swarm/swarmlib.dart
index a75c4d853e0aa4a0e25eae61b92bc6fa2b094428..bbfcf3c99e758606f36baadc9270dbe35d1b0577 100644
--- a/samples/swarm/swarmlib.dart
+++ b/samples/swarm/swarmlib.dart
@@ -1,4 +1,4 @@
-// Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
+// 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.
 
@@ -7,6 +7,7 @@
 #import('dart:coreimpl');
 #import('dart:json');
 #import('dart:html');
+#import('dart:math', prefix: 'Math');
 #import('../ui_lib/base/base.dart');
 #import('../ui_lib/view/view.dart');
 #import('../ui_lib/observable/observable.dart');