Roll Observatory packages and add a roll script

analyzer/lib/task/html.dart

Index: analyzer/lib/task/html.dart
diff --git a/analyzer/lib/task/html.dart b/analyzer/lib/task/html.dart
deleted file mode 100644
index abfbdf71c9498034339b2c2ac1f8175abe134bef..0000000000000000000000000000000000000000
--- a/analyzer/lib/task/html.dart
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@@ -1,29 +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.html;
-
-import 'package:analyzer/src/generated/error.dart';
-import 'package:analyzer/src/generated/source.dart';
-import 'package:analyzer/task/model.dart';
-import 'package:html/dom.dart';
-
-/**
- * The result of parsing an HTML file.
- */
-final ResultDescriptor<Document> HTML_DOCUMENT =
-    new ResultDescriptor<Document>('HTML_DOCUMENT', null);
-
-/**
- * The analysis errors associated with a [Source] representing an HTML file.
- */
-final ListResultDescriptor<AnalysisError> HTML_ERRORS =
-    new ListResultDescriptor<AnalysisError>(
-        'HTML_ERRORS', AnalysisError.NO_ERRORS);
-
-/**
- * The sources of the Dart libraries referenced by an HTML file.
- */
-final ListResultDescriptor<Source> REFERENCED_LIBRARIES =
-    new ListResultDescriptor<Source>('REFERENCED_LIBRARIES', Source.EMPTY_LIST);