Update some of the fixes to use ChangeBuilder

pkg/analysis_server/test/integration/edit/get_fixes_test.dart

Index: pkg/analysis_server/test/integration/edit/get_fixes_test.dart
diff --git a/pkg/analysis_server/test/integration/edit/get_fixes_test.dart b/pkg/analysis_server/test/integration/edit/get_fixes_test.dart
index e32ce8f4673c1c6b79d394a5ce41fe528a9cc50a..eccbe2916bf82c4f6876101631ecde4b3d2725a2 100644
--- a/pkg/analysis_server/test/integration/edit/get_fixes_test.dart
+++ b/pkg/analysis_server/test/integration/edit/get_fixes_test.dart
@@ -2,6 +2,8 @@
 // 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.
 
+import 'dart:async';
+
 import 'package:analysis_server/protocol/protocol_generated.dart';
 import 'package:analyzer_plugin/protocol/protocol_common.dart';
 import 'package:test/test.dart';
@@ -47,6 +49,9 @@ Future f;
     writeFile(pathname, text);
 
     await analysisFinished;
+    // The errors (at least sometimes) don't get sent until after analysis has
+    // completed. Wait long enough to see whether new errors are reported.
+    await new Future.delayed(new Duration(milliseconds: 1000));
     expect(currentAnalysisErrors[pathname], isEmpty);
   }