Import math library with a prefix.

pkg/stack_trace/lib/src/trace.dart

Index: pkg/stack_trace/lib/src/trace.dart
diff --git a/pkg/stack_trace/lib/src/trace.dart b/pkg/stack_trace/lib/src/trace.dart
index bed1d5d89c799419d156dabe75835ffc34572a9a..33b2dd42262fad813a1e3811f3b0b147e5a91311 100644
--- a/pkg/stack_trace/lib/src/trace.dart
+++ b/pkg/stack_trace/lib/src/trace.dart
@@ -5,7 +5,7 @@
 library trace;
 
 import 'dart:uri';
-import 'dart:math';
+import 'dart:math' as math;
 
 import 'frame.dart';
 
@@ -117,7 +117,7 @@ class Trace implements StackTrace {
     if (frames.length == '') return '';
 
     // Figure out the longest path so we know how much to pad.
-    var longest = frames.map((frame) => frame.location.length).reduce(max);
+    var longest = frames.map((frame) => frame.location.length).reduce(math.max);
 
     // Print out the stack trace nicely formatted.
     return frames.map((frame) {