Issue 27130. Fix applying changes to .analysis_options on save.

pkg/analyzer/test/src/context/context_test.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 analyzer.test.src.context.context_test;
 
 import 'dart:async';
 import 'dart:collection';
 
 import 'package:analyzer/dart/ast/ast.dart';
@@ skipping 380 matching lines @@
     Source source = addSource("/test.dart", content);
     context.setContents(source, content);
     context.computeErrors(source);
     while (!context.sourcesNeedingProcessing.isEmpty) {
       context.performAnalysisTask();
     }
     // Adding the source as a changedSource should have no effect since
     // it is already overridden in the content cache.
     ChangeSet changeSet = new ChangeSet();
     changeSet.changedSource(source);
-    ApplyChangesStatus changesStatus = context.applyChanges(changeSet);
-    expect(changesStatus.hasChanges, isFalse);
+    context.applyChanges(changeSet);
     expect(context.sourcesNeedingProcessing, hasLength(0));
   }
 
   void test_applyChanges_recompute_exportNamespace() {
     Source libSource = addSource(
         "/lib.dart",
         r'''
 class A {}
 ''');
     Source exporterSource = addSource(
@@ skipping 4835 matching lines @@
    * Initialize the visitor.
    */
   _ElementGatherer();
 
   @override
   void visitElement(Element element) {
     elements[element] = element;
     super.visitElement(element);
   }
 }