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

pkg/intl/lib/date_format_helpers.dart

 // 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.
 
 /**
  * A class for holding onto the data for a date so that it can be built
  * up incrementally.
  */
 class _DateBuilder {
   int year = 0,
@@ skipping 69 matching lines @@
 
   /**
    * Return the next [howMany] items, or as many as there are remaining.
    * Does not modify the stream position.
    */
   peek([howMany = 1]) {
     var result;
     if (contents is String) {
       result = contents.substring(
           index,
-          Math.min(index + howMany, contents.length));
+          min(index + howMany, contents.length));
     } else {
       // Assume List
       result = contents.getRange(index, howMany);
     }
     return result;
   }
 
   /** Return the remaining contents of the stream */
   rest() => peek(contents.length - index);
 
@@ skipping 22 matching lines @@
 
   /**
    * Assuming that the contents are characters, read as many digits as we
    * can see and then return the corresponding integer. Advance the stream.
    */
   var digitMatcher = const RegExp(@'\d+');
   int nextInteger() {
     var string = digitMatcher.stringMatch(rest());
     if (string == null || string.isEmpty()) return null;
     read(string.length);
-    return Math.parseInt(string);
+    return parseInt(string);
   }
-}
+}