Add SearchResultKind.UNKNOWN to the analysis server API.

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/spec/generate_files".
 
 /**
  * Matchers for data types defined in the analysis server API
@@ skipping 1626 matching lines @@
 
 /**
  * SearchResultKind
  *
  * enum {
  *   DECLARATION
  *   INVOCATION
  *   READ
  *   READ_WRITE
  *   REFERENCE
+ *   UNKNOWN
  *   WRITE
  * }
  */
 final Matcher isSearchResultKind = new MatchesEnum("SearchResultKind", [
   "DECLARATION",
   "INVOCATION",
   "READ",
   "READ_WRITE",
   "REFERENCE",
+  "UNKNOWN",
   "WRITE"
 ]);
 
 /**
  * ServerService
  *
  * enum {
  *   STATUS
  * }
  */
@@ skipping 224 matching lines @@
  *
  * {
  *   "newName": String
  * }
  */
 final Matcher isRenameOptions = new LazyMatcher(() => new MatchesJsonObject(
   "rename options", {
     "newName": isString
   }));