Roll Observatory packages and add a roll script

initialize/lib/src/static_loader.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.
-library initialize.static_loader;
-
-import 'dart:collection' show Queue;
-import 'package:initialize/initialize.dart';
-
-/// This represents an annotation/declaration pair.
-class InitEntry<T> {
-  /// The annotation instance.
-  final Initializer<T> meta;
-
-  /// The target of the annotation to pass to initialize.
-  final T target;
-
-  InitEntry(this.meta, this.target);
-}
-
-/// Set of initializers that are invoked by `run`.  This is initialized with
-/// code automatically generated by the transformer.
-Queue<InitEntry> initializers = new Queue<InitEntry>();
-
-/// Returns initializer functions matching the supplied filters and removes them
-/// from `initializers` so they won't be ran again.
-Queue<Function> loadInitializers(
-    {List<Type> typeFilter, InitializerFilter customFilter, Uri from}) {
-  if (from != null) {
-    throw 'The `from` option is not supported in deploy mode.';
-  }
-  Queue<Function> result = new Queue<Function>();
-
-  var matchesFilters = (initializer) {
-    if (typeFilter != null &&
-        !typeFilter.any((t) => initializer.meta.runtimeType == t)) {
-      return false;
-    }
-    if (customFilter != null && !customFilter(initializer.meta)) {
-      return false;
-    }
-    return true;
-  };
-
-  result.addAll(initializers
-      .where(matchesFilters)
-      .map((i) => () => i.meta.initialize(i.target)));
-
-  initializers.removeWhere(matchesFilters);
-
-  return result;
-}