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

samples/isolate_html/isolate_sample.dart

Index: samples/isolate_html/isolate_sample.dart
diff --git a/samples/isolate_html/isolate_sample.dart b/samples/isolate_html/isolate_sample.dart
index 6e377eb20c666f2b081c6b9437ad2b3efcc778bf..d63f9afb30c578390c629dd786e1ad7f5c197cff 100644
--- a/samples/isolate_html/isolate_sample.dart
+++ b/samples/isolate_html/isolate_sample.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.
 
@@ -6,6 +6,7 @@
 
 #import('dart:html');
 #import('dart:isolate');
+#import('dart:math', prefix: 'Math');
 
 #source('IsolateSample.dart');