Minor changes in analyzer to make it easier to extend

pkg/analyzer/test/generated/engine_test.dart

Index: pkg/analyzer/test/generated/engine_test.dart
diff --git a/pkg/analyzer/test/generated/engine_test.dart b/pkg/analyzer/test/generated/engine_test.dart
index f0556c9aeabe17045a35beab4470080b2c5c79cd..d20ab08600a18d40ca3220bea94d640a74124924 100644
--- a/pkg/analyzer/test/generated/engine_test.dart
+++ b/pkg/analyzer/test/generated/engine_test.dart
@@ -6056,6 +6056,19 @@ class TestAnalysisContext implements InternalAnalysisContext {
     fail("Unexpected invocation of getTypeProvider");
     return null;
   }
+
+  @override
+  TypeResolverVisitorFactory get typeResolverVisitorFactory {
+    fail("Unexpected invocation of getTypeResolverVisitorFactory");
+    return null;
+  }
+
+  @override
+  ResolverVisitorFactory get resolverVisitorFactory {
+    fail("Unexpected invocation of getResolverVisitorFactory");
+    return null;
+  }
+
   @override
   void addListener(AnalysisListener listener) {
     fail("Unexpected invocation of addListener");