Update charted to 0.4.8 and roll

packages/stack_trace/lib/src/lazy_trace.dart

Index: packages/stack_trace/lib/src/lazy_trace.dart
diff --git a/packages/stack_trace/lib/src/lazy_trace.dart b/packages/stack_trace/lib/src/lazy_trace.dart
index 6bfe51c73a328ac0db903c56b25ec3f5ff45b59d..a31b75fdea2ab2e83410d2f6e57cf58b99d9725f 100644
--- a/packages/stack_trace/lib/src/lazy_trace.dart
+++ b/packages/stack_trace/lib/src/lazy_trace.dart
@@ -2,8 +2,6 @@
 // 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 lazy_trace;
-
 import 'frame.dart';
 import 'trace.dart';
 
@@ -25,10 +23,11 @@ class LazyTrace implements Trace {
   }
 
   List<Frame> get frames => _trace.frames;
+  StackTrace get original => _trace.original;
   StackTrace get vmTrace => _trace.vmTrace;
   Trace get terse => new LazyTrace(() => _trace.terse);
   Trace foldFrames(bool predicate(Frame frame), {bool terse: false}) =>
-    new LazyTrace(() => _trace.foldFrames(predicate, terse: terse));
+      new LazyTrace(() => _trace.foldFrames(predicate, terse: terse));
   String toString() => _trace.toString();
 
   // Work around issue 14075.