Add SourceFileEdit.time field.

pkg/analysis_server/lib/src/constants.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 server.constants;
 
 //
 // Server methods
 //
 const String SERVER_GET_VERSION = 'server.getVersion';
@@ skipping 107 matching lines @@
 const String DISPLAY_NAME = 'displayName';
 const String EDITS = 'edits';
 const String ELEMENT = 'element';
 const String ELEMENT_DESCRIPTION = 'elementDescription';
 const String ELEMENT_KIND = 'elementKind';
 const String EXCLUDED = 'excluded';
 const String ERROR = 'error';
 const String ERRORS = 'errors';
 const String FATAL = 'fatal';
 const String FILE = 'file';
+const String FILE_STAMP = 'fileStamp';
 const String FILES = 'files';
 const String FIXES = 'fixes';
 const String FLAGS = 'flags';
 const String HIERARCHY_ITEMS = 'hierarchyItems';
 const String HOVERS = 'hovers';
 const String ID = 'id';
 const String INCLUDE_POTENTIAL = 'includePotential';
 const String INCLUDED = 'included';
 const String INTERFACE_MEMBERS = 'interfaceMembers';
 const String INTERFACES = 'interfaces';
@@ skipping 43 matching lines @@
 const String STATIC_TYPE = 'staticType';
 const String SUBCLASSES = 'subclasses';
 const String SUBSCRIPTIONS = 'subscriptions';
 const String SUGGESTIONS = 'suggestions';
 const String SUPERCLASS = 'superclass';
 const String SUPER_CLASS_MEMBER = 'superclassMember';
 const String TARGETS = 'targets';
 const String TYPE = 'type';
 const String VALUE = 'value';
 const String VERSION = 'version';