Update charted to 0.4.8 and roll

packages/package_config/lib/src/packages_impl.dart

 // Copyright (c) 2015, 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.
 
 /// Implementations of [Packages] that may be used in either server or browser
 /// based applications. For implementations that can only run in the browser,
 /// see [package_config.packages_io_impl].
 library package_config.packages_impl;
 
 import "dart:collection" show UnmodifiableMapView;
 import "../packages.dart";
 import "util.dart" show checkValidPackageUri;
 
 /// A [Packages] null-object.
 class NoPackages implements Packages {
   const NoPackages();
 
   Uri resolve(Uri packageUri, {Uri notFound(Uri packageUri)}) {
     String packageName = checkValidPackageUri(packageUri);
     if (notFound != null) return notFound(packageUri);
-    throw new ArgumentError.value(packageUri, "packageUri",
-                                  'No package named "$packageName"');
+    throw new ArgumentError.value(
+        packageUri, "packageUri", 'No package named "$packageName"');
   }
 
   Iterable<String> get packages => new Iterable<String>.generate(0);
 
-  Map<String, Uri> asMap() => const<String,Uri>{};
+  Map<String, Uri> asMap() => const <String, Uri>{};
 }
 
 /// Base class for [Packages] implementations.
 ///
 /// This class implements the [resolve] method in terms of a private
 /// member
 abstract class PackagesBase implements Packages {
   Uri resolve(Uri packageUri, {Uri notFound(Uri packageUri)}) {
     packageUri = _normalizePath(packageUri);
     String packageName = checkValidPackageUri(packageUri);
     Uri packageBase = getBase(packageName);
     if (packageBase == null) {
       if (notFound != null) return notFound(packageUri);
-      throw new ArgumentError.value(packageUri, "packageUri",
-                                    'No package named "$packageName"');
+      throw new ArgumentError.value(
+          packageUri, "packageUri", 'No package named "$packageName"');
     }
     String packagePath = packageUri.path.substring(packageName.length + 1);
     return packageBase.resolve(packagePath);
   }
 
   /// Find a base location for a package name.
   ///
   /// Returns `null` if no package exists with that name, and that can be
   /// determined.
   Uri getBase(String packageName);
@@ skipping 32 matching lines @@
   }
 
   Iterable<String> get packages {
     throw _failListingPackages();
   }
 
   Map<String, Uri> asMap() {
     throw _failListingPackages();
   }
 }