Import math library with a prefix.

Review URL: https://codereview.chromium.org//14111004

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@21406 260f80e4-7a28-3924-810f-c04153c831b5

test/command_line_config.dart

@@ -5,7 +5,7 @@
 library command_line_config;
 
 import 'dart:io';
-import 'dart:math';
+import 'dart:math' as math;
 
 import 'package:pathos/path.dart' as path;
 import 'package:unittest/unittest.dart';
@@ -92,7 +92,7 @@ class CommandLineConfiguration extends Configuration {
     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).reduce(max);
+    int longest = stack.map((frame) => frame.location.length).reduce(math.max);
 
     // Print out the stack trace nicely formatted.
     for (var frame in stack) {