Roll Observatory packages and add a roll script

analyzer/lib/src/generated/utilities_dart.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.
-
-// This code was auto-generated, is not intended to be edited, and is subject to
-// significant change. Please see the README file for more information.
-
-library engine.utilities.dart;
-
-import 'java_core.dart';
-
-/**
- * The enumeration `ParameterKind` defines the different kinds of parameters. There are two
- * basic kinds of parameters: required and optional. Optional parameters are further divided into
- * two kinds: positional optional and named optional.
- */
-class ParameterKind extends Enum<ParameterKind> {
-  static const ParameterKind REQUIRED =
-      const ParameterKind('REQUIRED', 0, false);
-
-  static const ParameterKind POSITIONAL =
-      const ParameterKind('POSITIONAL', 1, true);
-
-  static const ParameterKind NAMED = const ParameterKind('NAMED', 2, true);
-
-  static const List<ParameterKind> values = const [REQUIRED, POSITIONAL, NAMED];
-
-  /**
-   * A flag indicating whether this is an optional parameter.
-   */
-  final bool isOptional;
-
-  /**
-   * Initialize a newly created kind with the given state.
-   *
-   * @param isOptional `true` if this is an optional parameter
-   */
-  const ParameterKind(String name, int ordinal, this.isOptional)
-      : super(name, ordinal);
-}
-
-/**
- * Check whether [uri1] starts with (or 'is prefixed by') [uri2] by checking
- * path segments.
- */
-bool startsWith(Uri uri1, Uri uri2) {
-  List<String> uri1Segments = uri1.pathSegments;
-  List<String> uri2Segments = uri2.pathSegments.toList();
-  // Trim trailing empty segments ('/foo/' => ['foo', ''])
-  if (uri2Segments.last == '') {
-    uri2Segments.removeLast();
-  }
-
-  if (uri2Segments.length > uri1Segments.length) {
-    return false;
-  }
-
-  for (int i = 0; i < uri2Segments.length; ++i) {
-    if (uri2Segments[i] != uri1Segments[i]) {
-      return false;
-    }
-  }
-  return true;
-}