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

pkg/analyzer/lib/src/task/html.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 analyzer.src.task.html;
 
 import 'package:analyzer/src/generated/engine.dart' hide AnalysisTask;
 import 'package:analyzer/src/generated/source.dart';
 import 'package:analyzer/src/task/general.dart';
 import 'package:analyzer/task/general.dart';
 import 'package:analyzer/task/html.dart';
 import 'package:analyzer/task/model.dart';
-import 'package:html/dom.dart';
-import 'package:html/parser.dart';
+//import 'package:html/dom.dart';
+//import 'package:html/parser.dart';
 
 /**
  * A task that scans the content of a file, producing a set of Dart tokens.
  */
 class ParseHtmlTask extends SourceBasedAnalysisTask {
   /**
    * The name of the input whose value is the content of the file.
    */
   static const String CONTENT_INPUT_NAME = 'CONTENT_INPUT_NAME';
 
   /**
    * The task descriptor describing this kind of task.
    */
   static final TaskDescriptor DESCRIPTOR = new TaskDescriptor('ParseHtmlTask',
-      createTask, buildInputs, <ResultDescriptor>[DOCUMENT, DOCUMENT_ERRORS]);
+      createTask, buildInputs,
+      <ResultDescriptor>[/*DOCUMENT, DOCUMENT_ERRORS*/]);
 
   /**
    * Initialize a newly created task to access the content of the source
    * associated with the given [target] in the given [context].
    */
   ParseHtmlTask(InternalAnalysisContext context, AnalysisTarget target)
       : super(context, target);
 
   @override
   TaskDescriptor get descriptor => DESCRIPTOR;
 
   @override
   void internalPerform() {
-    String content = getRequiredInput(CONTENT_INPUT_NAME);
-
-    HtmlParser parser = new HtmlParser(content);
-    Document document = parser.parse();
-    List<ParseError> errors = parser.errors;
-
-    outputs[DOCUMENT] = document;
-    outputs[DOCUMENT_ERRORS] = errors;
+//    String content = getRequiredInput(CONTENT_INPUT_NAME);
+//
+//    HtmlParser parser = new HtmlParser(content);
+//    Document document = parser.parse();
+//    List<ParseError> errors = parser.errors;
+//
+//    outputs[DOCUMENT] = document;
+//    outputs[DOCUMENT_ERRORS] = errors;
   }
 
   /**
    * Return a map from the names of the inputs of this kind of task to the task
    * input descriptors describing those inputs for a task with the given
    * [source].
    */
   static Map<String, TaskInput> buildInputs(Source source) {
     return <String, TaskInput>{CONTENT_INPUT_NAME: CONTENT.of(source)};
   }
 
   /**
    * Create a [ParseHtmlTask] based on the given [target] in the given [context].
    */
   static ParseHtmlTask createTask(
       AnalysisContext context, AnalysisTarget target) {
     return new ParseHtmlTask(context, target);
   }
 }