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

pkg/analyzer/lib/src/generated/engine.dart

Index: pkg/analyzer/lib/src/generated/engine.dart
diff --git a/pkg/analyzer/lib/src/generated/engine.dart b/pkg/analyzer/lib/src/generated/engine.dart
index 7e0f08a4c12ae571d55c9efc39227cfa49b4b843..8975ccd98a9639ecceaee2dd721bf1de1b73553b 100644
--- a/pkg/analyzer/lib/src/generated/engine.dart
+++ b/pkg/analyzer/lib/src/generated/engine.dart
@@ -227,7 +227,7 @@ abstract class AnalysisContext {
    * analysis results that have been invalidated by these changes will be
    * removed.
    */
-  ApplyChangesStatus applyChanges(ChangeSet changeSet);
+  void applyChanges(ChangeSet changeSet);
 
   /**
    * Return the documentation comment for the given [element] as it appears in
@@ -1513,18 +1513,6 @@ class AnalysisResult {
 }
 
 /**
- * The result of applying a [ChangeSet] to a [AnalysisContext].
- */
-class ApplyChangesStatus {
-  /**
-   * Is `true` if the given [ChangeSet] caused any changes in the context.
-   */
-  final bool hasChanges;
-
-  ApplyChangesStatus(this.hasChanges);
-}
-
-/**
  * Statistics about cache consistency validation.
  */
 class CacheConsistencyValidationStatistics {