Update charted to 0.4.8 and roll

packages/stack_trace/lib/src/utils.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 stack_trace.src.utils;
-
 /// The line used in the string representation of stack chains to represent
 /// the gap between traces.
 const chainGap = '===== asynchronous gap ===========================\n';
 
-/// Returns [string] with enough spaces added to the end to make it [length]
-/// characters long.
-String padRight(String string, int length) {
-  if (string.length >= length) return string;
+/// The line used in the string representation of VM stack chains to represent
+/// the gap between traces.
+const vmChainGap = '<asynchronous suspension>\n';
 
-  var result = new StringBuffer();
-  result.write(string);
-  for (var i = 0; i < length - string.length; i++) {
-    result.write(' ');
-  }
-
-  return result.toString();
-}
-
-/// Flattens nested lists inside an iterable into a single list containing only
-/// non-list elements.
-List flatten(Iterable nested) {
-  var result = [];
-  helper(list) {
-    for (var element in list) {
-      if (element is List) {
-        helper(element);
-      } else {
-        result.add(element);
-      }
-    }
-  }
-  helper(nested);
-  return result;
-}
+// TODO(nweiz): When cross-platform imports work, use them to set this.
+/// Whether we're running in a JS context.
+final bool inJS = 0.0 is int;