Prepare for chaining resynthesizers from AC to SDK AC.

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 4f8d664a8ebaad3c874b7676524b99838ec6b044..4262ca0dd833ad9e16fbca38ba77facde2cf51a6 100644
--- a/pkg/analyzer/lib/src/generated/engine.dart
+++ b/pkg/analyzer/lib/src/generated/engine.dart
@@ -24,6 +24,7 @@ import 'package:analyzer/src/generated/utilities_general.dart';
 import 'package:analyzer/src/plugin/command_line_plugin.dart';
 import 'package:analyzer/src/plugin/engine_plugin.dart';
 import 'package:analyzer/src/plugin/options_plugin.dart';
+import 'package:analyzer/src/summary/resynthesize.dart';
 import 'package:analyzer/src/task/manager.dart';
 import 'package:analyzer/task/dart.dart';
 import 'package:analyzer/task/model.dart';
@@ -1888,6 +1889,11 @@ abstract class InternalAnalysisContext implements AnalysisContext {
   CachePartition get privateAnalysisCachePartition;
 
   /**
+   * The helper for [aboutToComputeResult].
+   */
+  AboutToComputeResultHelper aboutToComputeResultHelper;
+
+  /**
    * Sets the [TypeProvider] for this context.
    */
   void set typeProvider(TypeProvider typeProvider);