(TBR) Attempt to fix the build by backing out HTML support

pkg/analyzer/lib/task/html.dart

Index: pkg/analyzer/lib/task/html.dart
diff --git a/pkg/analyzer/lib/task/html.dart b/pkg/analyzer/lib/task/html.dart
index 7f17866a7da318416580b407f21c92f05a86f523..f03e0f9d56369e2bdbf0f9aa8af6a5d43ec160c0 100644
--- a/pkg/analyzer/lib/task/html.dart
+++ b/pkg/analyzer/lib/task/html.dart
@@ -4,18 +4,18 @@
 
 library analyzer.task.html;
 
-import 'package:analyzer/task/model.dart';
-import 'package:html/dom.dart';
-import 'package:html/parser.dart';
+//import 'package:analyzer/task/model.dart';
+//import 'package:html/dom.dart';
+//import 'package:html/parser.dart';
 
-/**
- * The result of parsing an HTML file.
- */
-final ResultDescriptor<Document> DOCUMENT =
-    new ResultDescriptor<Document>('DOCUMENT', null);
-
-/**
- * The errors found while parsing an HTML file.
- */
-final ListResultDescriptor<ParseError> DOCUMENT_ERRORS =
-    new ListResultDescriptor<ParseError>('DOCUMENT_ERRORS', <ParseError>[]);
+///**
+// * The result of parsing an HTML file.
+// */
+//final ResultDescriptor<Document> DOCUMENT =
+//    new ResultDescriptor<Document>('DOCUMENT', null);
+//
+///**
+// * The errors found while parsing an HTML file.
+// */
+//final ListResultDescriptor<ParseError> DOCUMENT_ERRORS =
+//    new ListResultDescriptor<ParseError>('DOCUMENT_ERRORS', <ParseError>[]);