Added new version of reduce.

utils/tests/pub/command_line_config.dart

 // Copyright (c) 2013, 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 command_line_config;
 
 import 'dart:io';
+import 'dart:math';
 
 import 'package:pathos/path.dart' as path;
 import 'package:unittest/unittest.dart';
 import '../../pub/utils.dart';
 
 /// Gets a "special" string (ANSI escape or Unicode). On Windows, returns
 /// something else since those aren't supported.
 String _getSpecial(String color, [String onWindows = '']) {
   // No ANSI escapes on windows.
   if (Platform.operatingSystem == 'windows') return onWindows;
@@ skipping 66 matching lines @@
     // Parse out each stack entry.
     var stack = [];
     for (var line in stackTrace.split('\n')) {
       if (line.trim() == '') continue;
       stack.add(new _StackFrame(line));
     }
 
     if (stack.length == 0) return;
 
     // Figure out the longest path so we know how much to pad.
-    int longest = stack.map((frame) => frame.location.length).max();
+    int longest = stack.map((frame) => frame.location.length).reduce(max);
 
     // Print out the stack trace nicely formatted.
     for (var frame in stack) {
       print('  ${_padLeft(frame.location, longest)}  ${frame.member}');
     }
 
     print('');
   }
 
   String _padLeft(String string, int length) {
@@ skipping 54 matching lines @@
     var library = match[2];
     if (!isCore) {
       // Make the library path relative to the entrypoint.
       library = path.relative(library);
     }
 
     var member = match[1].replaceAll("<anonymous closure>", _lambda);
     return new _StackFrame._(isCore, library, match[3], match[4], member);
   }
 }