Update charted to 0.4.8 and roll

packages/package_config/lib/packages_file.dart

Index: packages/package_config/lib/packages_file.dart
diff --git a/packages/package_config/lib/packages_file.dart b/packages/package_config/lib/packages_file.dart
index f30781dc3fb3b0a076e2990451e48e41114fa8e9..93ccd3c18d4cd13dd27dae5a874351f69b795d1a 100644
--- a/packages/package_config/lib/packages_file.dart
+++ b/packages/package_config/lib/packages_file.dart
@@ -84,7 +84,7 @@ Map<String, Uri> parse(List<int> source, Uri baseLocation) {
 /// All the keys of [packageMapping] must be valid package names,
 /// and the values must be URIs that do not have the `package:` scheme.
 void write(StringSink output, Map<String, Uri> packageMapping,
-           {Uri baseUri, String comment}) {
+    {Uri baseUri, String comment}) {
   if (baseUri != null && !baseUri.isAbsolute) {
     throw new ArgumentError.value(baseUri, "baseUri", "Must be absolute");
   }