Re-enable and add new HTML support

pkg/analyzer/lib/src/generated/error.dart

 // Copyright (c) 2014, 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 engine.error;
 
 import 'dart:collection';
 
 import 'ast.dart' show AstNode;
 import 'element.dart';
@@ skipping 3093 matching lines @@
       : super(name, message, correction);
 
   @override
   ErrorSeverity get errorSeverity => ErrorType.HINT.severity;
 
   @override
   ErrorType get type => ErrorType.HINT;
 }
 
 /**
+ * The error codes used for errors in HTML files. The convention for this
+ * class is for the name of the error code to indicate the problem that caused
+ * the error to be generated and for the error message to explain what is wrong
+ * and, when appropriate, how the problem can be corrected.
+ */
+class HtmlErrorCode extends ErrorCode {
+  /**
+   * An error code indicating that there is a syntactic error in the file.
+   *
+   * Parameters:
+   * 0: the error message from the parse error
+   */
+  static const HtmlErrorCode PARSE_ERROR =
+      const HtmlErrorCode('PARSE_ERROR', '{0}');
+
+  /**
+   * Initialize a newly created error code to have the given [name]. The message
+   * associated with the error will be created from the given [message]
+   * template. The correction associated with the error will be created from the
+   * given [correction] template.
+   */
+  const HtmlErrorCode(String name, String message, [String correction])
+      : super(name, message, correction);
+
+  @override
+  ErrorSeverity get errorSeverity => ErrorSeverity.ERROR;
+
+  @override
+  ErrorType get type => ErrorType.COMPILE_TIME_ERROR;
+}
+
+/**
  * The error codes used for warnings in HTML files. The convention for this
  * class is for the name of the error code to indicate the problem that caused
  * the error to be generated and for the error message to explain what is wrong
  * and, when appropriate, how the problem can be corrected.
  */
 class HtmlWarningCode extends ErrorCode {
   /**
    * An error code indicating that the value of the 'src' attribute of a Dart
    * script tag is not a valid URI.
    *
@@ skipping 1814 matching lines @@
    * Initialize a newly created error code to have the given [name].
    */
   const TodoCode(String name) : super(name, "{0}");
 
   @override
   ErrorSeverity get errorSeverity => ErrorSeverity.INFO;
 
   @override
   ErrorType get type => ErrorType.TODO;
 }