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

lib/compiler/implementation/util/uri_extras.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.
 
 #library('uri_extras');
 
+#import('dart:math');
 #import('dart:uri');
 
 String relativize(Uri base, Uri uri) {
   if (base.scheme == 'file' &&
       base.scheme == uri.scheme &&
       base.userInfo == uri.userInfo &&
       base.domain == uri.domain &&
       base.port == uri.port &&
       uri.query == "" && uri.fragment == "") {
     if (uri.path.startsWith(base.path)) {
       return uri.path.substring(base.path.length);
     }
     List<String> uriParts = uri.path.split('/');
     List<String> baseParts = base.path.split('/');
     int common = 0;
-    int length = Math.min(uriParts.length, baseParts.length);
+    int length = min(uriParts.length, baseParts.length);
     while (common < length && uriParts[common] == baseParts[common]) {
       common++;
     }
     StringBuffer sb = new StringBuffer();
     for (int i = common + 1; i < baseParts.length; i++) {
       sb.add('../');
     }
     for (int i = common; i < uriParts.length - 1; i++) {
       sb.add('${uriParts[i]}/');
     }
     sb.add('${uriParts.last()}');
     return sb.toString();
   }
   return uri.toString();
 }