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

samples/ui_lib/touch/touch.dart

Index: samples/ui_lib/touch/touch.dart
diff --git a/samples/ui_lib/touch/touch.dart b/samples/ui_lib/touch/touch.dart
index d6103714f3af5aeabdc3c5ca000bbdcae2300b01..8581c8a63fdaf9d5127cb3bc7d74753cfe5eac60 100644
--- a/samples/ui_lib/touch/touch.dart
+++ b/samples/ui_lib/touch/touch.dart
@@ -1,11 +1,13 @@
-// 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.
 
 #library('touch');
 
-#import('dart:html');
 #import('dart:coreimpl');
+#import('dart:html');
+#import('dart:math', prefix: 'Math');
+
 #import('../base/base.dart');
 #import('../util/utilslib.dart');