Add ENUM and ENUM_CONSTANT to the specification.

pkg/analysis_server/test/integration/protocol_matchers.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.
 //
 // This file has been automatically generated.  Please do not edit it manually.
 // To regenerate the file, use the script
 // "pkg/analysis_server/tool/spec/generate_files".
 
 /**
  * Matchers for data types defined in the analysis server API
@@ skipping 1256 matching lines @@
  * enum {
  *   ANNOTATION
  *   BUILT_IN
  *   CLASS
  *   COMMENT_BLOCK
  *   COMMENT_DOCUMENTATION
  *   COMMENT_END_OF_LINE
  *   CONSTRUCTOR
  *   DIRECTIVE
  *   DYNAMIC_TYPE
+ *   ENUM
+ *   ENUM_CONSTANT
  *   FIELD
  *   FIELD_STATIC
  *   FUNCTION
  *   FUNCTION_DECLARATION
  *   FUNCTION_TYPE_ALIAS
  *   GETTER_DECLARATION
  *   IDENTIFIER_DEFAULT
  *   IMPORT_PREFIX
  *   KEYWORD
  *   LABEL
@@ skipping 19 matching lines @@
 final Matcher isHighlightRegionType = new MatchesEnum("HighlightRegionType", [
   "ANNOTATION",
   "BUILT_IN",
   "CLASS",
   "COMMENT_BLOCK",
   "COMMENT_DOCUMENTATION",
   "COMMENT_END_OF_LINE",
   "CONSTRUCTOR",
   "DIRECTIVE",
   "DYNAMIC_TYPE",
+  "ENUM",
+  "ENUM_CONSTANT",
   "FIELD",
   "FIELD_STATIC",
   "FUNCTION",
   "FUNCTION_DECLARATION",
   "FUNCTION_TYPE_ALIAS",
   "GETTER_DECLARATION",
   "IDENTIFIER_DEFAULT",
   "IMPORT_PREFIX",
   "KEYWORD",
   "LABEL",
@@ skipping 711 matching lines @@
  *
  * {
  *   "newName": String
  * }
  */
 final Matcher isRenameOptions = new LazyMatcher(() => new MatchesJsonObject(
   "rename options", {
     "newName": isString
   }));