Remove 'errorCode' field from AnalysisError in the analysis server API.

pkg/analysis_server/test/analysis_abstract.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 test.domain.analysis.abstract;
 
 import 'dart:async';
 
 import 'package:analysis_server/src/analysis_server.dart';
 import 'package:analysis_server/src/constants.dart';
@@ skipping 18 matching lines @@
           c >= '0'.codeUnitAt(0) && c <= '9'.codeUnitAt(0))) {
       break;
     }
     length++;
   }
   return length;
 }
 
 
 
-AnalysisError _jsonToAnalysisError(Map<String, Object> json) {
-  return new AnalysisError(
-      json['file'],
-      json['errorCode'],
-      json['offset'],
-      json['length'],
-      json['message'],
-      json['correction']);
-}
-
-
 /**
  * An abstract base for all 'analysis' domain tests.
  */
 class AbstractAnalysisTest {
   MockServerChannel serverChannel;
   MemoryResourceProvider resourceProvider;
   MockPackageMapProvider packageMapProvider;
   AnalysisServer server;
   RequestHandler handler;
 
@@ skipping 222 matching lines @@
   final String correction;
   AnalysisError(this.file, this.errorCode, this.offset, this.length,
       this.message, this.correction);
 
   @override
   String toString() {
     return 'NotificationError(file=$file; errorCode=$errorCode; '
         'offset=$offset; length=$length; message=$message)';
   }
 }