Roll Observatory packages and add a roll script

analyzer/lib/task/general.dart

Index: analyzer/lib/task/general.dart
diff --git a/analyzer/lib/task/general.dart b/analyzer/lib/task/general.dart
deleted file mode 100644
index c40ff4c6be4cd92297dfbdc5b10d1fac3a65f5cb..0000000000000000000000000000000000000000
--- a/analyzer/lib/task/general.dart
+++ /dev/null
@@ -1,26 +0,0 @@
-// 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 analyzer.task.general;
-
-import 'package:analyzer/src/generated/source.dart';
-import 'package:analyzer/task/model.dart';
-
-/**
- * The content of a [Source].
- */
-final ResultDescriptor<String> CONTENT =
-    new ResultDescriptor<String>('CONTENT', null);
-
-/**
- * The line information for a [Source].
- */
-final ResultDescriptor<LineInfo> LINE_INFO =
-    new ResultDescriptor<LineInfo>('LINE_INFO', null);
-
-/**
- * The modification time of a [Source].
- */
-final ResultDescriptor<int> MODIFICATION_TIME =
-    new ResultDescriptor<int>('MODIFICATION_TIME', -1);