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

samples/matrix/matrix_server.dart

Index: samples/matrix/matrix_server.dart
diff --git a/samples/matrix/matrix_server.dart b/samples/matrix/matrix_server.dart
index be84c802f5e6380bbfe35390e26e774cc3a356f8..eb54f5de24cd0f848dc1fbb0b07ec3c5fb215942 100644
--- a/samples/matrix/matrix_server.dart
+++ b/samples/matrix/matrix_server.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.
 
@@ -8,5 +8,6 @@
  * than #import'ing dart:dom_deprecated.)
  */
 #library("matrix");
+#import("dart:math", prefix: "Math");
 #source("matrix4.dart");
 #source("float32.dart");