Add observatory_pub_packages snapshot to third_party

observatory_pub_packages/smoke/src/default_transformer.dart

+// Copyright (c) 2014, 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.
+
+/// Transformer that replaces the default mirror-based implementation of smoke,
+/// so that during deploy smoke doesn't include any dependency on dart:mirrors.
+library smoke.src.default_transformer;
+
+import 'dart:async';
+import 'package:barback/barback.dart';
+
+/// Replaces the default mirror-based implementation of smoke in
+/// `pacakge:smoke/implementation.dart`, so that during deploy smoke doesn't
+/// include any dependency on dart:mirrors.
+// TODO(sigmund): include tests that run this transformation automatically.
+class DefaultTransformer extends Transformer {
+  DefaultTransformer.asPlugin();
+
+  /// Only apply to `lib/src/implementation.dart`.
+  // TODO(nweiz): This should just take an AssetId when barback <0.13.0 support
+  // is dropped.
+  Future<bool> isPrimary(idOrAsset) {
+    var id = idOrAsset is AssetId ? idOrAsset : idOrAsset.id;
+    return new Future.value(
+        id.package == 'smoke' && id.path == 'lib/src/implementation.dart');
+  }
+
+  Future apply(Transform transform) {
+    var id = transform.primaryInput.id;
+    return transform.primaryInput.readAsString().then((code) {
+      // Note: this rewrite is highly-coupled with how implementation.dart is
+      // written. Make sure both are updated in sync.
+      transform.addOutput(new Asset.fromString(id, code
+          .replaceAll(new RegExp('new Reflective[^;]*;'),
+              'throwNotConfiguredError();')
+          .replaceAll("import 'package:smoke/mirrors.dart';", '')));
+    });
+  }
+}
+
+/** Transformer phases which should be applied to the smoke package. */
+List<List<Transformer>> get phasesForSmoke =>
+    [[new DefaultTransformer.asPlugin()]];