Add error condition INVALID_OVERLAY_CHANGE to analysis server.

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 1615 matching lines @@
     "message": isString
   }, optionalFields: {
     "data": isObject
   }));
 
 /**
  * RequestErrorCode
  *
  * enum {
  *   GET_ERRORS_INVALID_FILE
+ *   INVALID_OVERLAY_CHANGE
  *   INVALID_PARAMETER
  *   INVALID_REQUEST
  *   SERVER_ALREADY_STARTED
  *   UNANALYZED_PRIORITY_FILES
  *   UNKNOWN_REQUEST
  *   UNSUPPORTED_FEATURE
  * }
  */
 final Matcher isRequestErrorCode = new MatchesEnum("RequestErrorCode", [
   "GET_ERRORS_INVALID_FILE",
+  "INVALID_OVERLAY_CHANGE",
   "INVALID_PARAMETER",
   "INVALID_REQUEST",
   "SERVER_ALREADY_STARTED",
   "UNANALYZED_PRIORITY_FILES",
   "UNKNOWN_REQUEST",
   "UNSUPPORTED_FEATURE"
 ]);
 
 /**
  * SearchId
@@ skipping 279 matching lines @@
  *
  * {
  *   "newName": String
  * }
  */
 final Matcher isRenameOptions = new LazyMatcher(() => new MatchesJsonObject(
   "rename options", {
     "newName": isString
   }));