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

runtime/lib/string.dart

-// 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.
 
 /**
  * [StringBase] contains common methods used by concrete String implementations,
  * e.g., OneByteString.
  */
 class StringBase {
 
   factory StringBase._uninstantiable() {
@@ skipping 108 matching lines @@
       if (this.substringMatches(index, other)) {
         return index;
       }
     }
     return -1;
   }
 
   int lastIndexOf(String other, [int start = null]) {
     if (start == null) start = length - 1;
     if (other.isEmpty()) {
-      return Math.min(this.length, start);
+      return min(this.length, start);
     }
     if (start >= this.length) {
       start = this.length - 1;
     }
     for (int index = start; index >= 0; index--) {
       if (this.substringMatches(index, other)) {
         return index;
       }
     }
     return -1;
@@ skipping 356 matching lines @@
     for (int g in groups) {
       result.add(group(g));
     }
     return result;
   }
 
   final int _start;
   final String str;
   final String pattern;
 }