Don't extract the name of a package from its description.

utils/pub/lock_file.dart

 // Copyright (c) 2012, 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('lock_file');
 
 #import('dart:json');
 #import('package.dart');
 #import('source_registry.dart');
 #import('utils.dart');
@@ skipping 45 matching lines @@
         }
         var source = sources[sourceName];
 
         // Parse the description.
         if (!spec.containsKey('description')) {
           throw new FormatException('Package $name is missing a description.');
         }
         var description = spec['description'];
         source.validateDescription(description, fromLockFile: true);
 
-        var id = new PackageId(source, version, description);
+        var id = new PackageId(name, source, version, description);
 
         // Validate the name.
         if (name != id.name) {
           throw new FormatException(
             "Package name $name doesn't match ${id.name}.");
         }
 
         packages[name] = id;
       });
     }
@@ skipping 12 matching lines @@
         'source': id.source.name,
         'description': id.description
       };
     });
 
     // TODO(nweiz): Serialize using the YAML library once it supports
     // serialization. For now, we use JSON, since it's a subset of YAML anyway.
     return JSON.stringify({'packages': packagesObj});
   }
 }