Revert "Remove @deprecated features."

pkg/polymer/lib/component_build.dart

Index: pkg/polymer/lib/component_build.dart
diff --git a/pkg/polymer/lib/component_build.dart b/pkg/polymer/lib/component_build.dart
new file mode 100644
index 0000000000000000000000000000000000000000..cdd08201c3a12204124d6fc1e029032026a60c5a
--- /dev/null
+++ b/pkg/polymer/lib/component_build.dart
@@ -0,0 +1,23 @@
+// 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.
+
+/** This library is deprecated. Please use `builder.dart` instead. */
+@deprecated
+library build_utils;
+
+import 'dart:async';
+import 'package:meta/meta.dart';
+
+import 'builder.dart' as builder;
+
+/**
+ * This function is deprecated. Please use `build` from `builder.dart`
+ * instead.
+ */
+@deprecated
+Future build(List<String> arguments, List<String> entryPoints,
+    {bool printTime: true, bool shouldPrint: true}) {
+  return builder.build(
+      entryPoints: entryPoints, options: builder.parseOptions(arguments));
+}