Roll Observatory packages and add a roll script

stack_trace/lib/src/unparsed_frame.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 stack_trace.unparsed_frame;
-
-import 'frame.dart';
-
-/// A frame that failed to parse.
-///
-/// The [member] property contains the original frame's contents.
-class UnparsedFrame implements Frame {
-  final Uri uri = new Uri(path: "unparsed");
-  final int line = null;
-  final int column = null;
-  final bool isCore = false;
-  final String library = "unparsed";
-  final String package = null;
-  final String location = "unparsed";
-
-  final String member;
-
-  UnparsedFrame(this.member);
-
-  String toString() => member;
-}