Add non-null types list to StrongModeOptions

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 e7bd28f0daa8d084cb24e56e6b84ef443fd24f82..febc999271bb30c34cedbc4b4ee3d379773f88b3 100644
--- a/pkg/analyzer/lib/src/generated/engine.dart
+++ b/pkg/analyzer/lib/src/generated/engine.dart
@@ -1303,6 +1303,12 @@ class AnalysisOptionsImpl implements AnalysisOptions {
    */
   bool implicitCasts = true;
 
+  /**
+   * A list of non-nullable type names, prefixed by the library URI they belong
+   * to, e.g., 'dart:core,int', 'dart:core,bool', 'file:///foo.dart,bar', etc.
+   */
+  List<String> nonnullableTypes = NONNULLABLE_TYPES;
+
   @override
   bool finerGrainedInvalidation = false;
 
@@ -1319,6 +1325,11 @@ class AnalysisOptionsImpl implements AnalysisOptions {
   bool implicitDynamic = true;
 
   /**
+   * The default list of non-nullable type names.
+   */
+  static const List<String> NONNULLABLE_TYPES = const <String>[];
+
+  /**
    * Initialize a newly created set of analysis options to have their default
    * values.
    */
@@ -1350,6 +1361,7 @@ class AnalysisOptionsImpl implements AnalysisOptions {
     if (options is AnalysisOptionsImpl) {
       strongModeHints = options.strongModeHints;
       implicitCasts = options.implicitCasts;
+      nonnullableTypes = options.nonnullableTypes;
       implicitDynamic = options.implicitDynamic;
     }
     trackCacheDependencies = options.trackCacheDependencies;