Clean up leg.dart.

dart/lib/compiler/implementation/resolution/resolution.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 resolution;
+
+import '../dart2jslib.dart' hide Diagnostic;
+import '../../compiler.dart' show Diagnostic;
+import '../tree/tree.dart';
+import '../elements/elements.dart';
+import '../util/util.dart';
+import '../scanner/scannerlib.dart' show PartialMetadataAnnotation;
+
+part 'members.dart';