Throw NSM on unresolved factory redirection.

pkg/front_end/testcases/redirecting_factory.dart.outline.expect

Index: pkg/front_end/testcases/redirecting_factory.dart.outline.expect
diff --git a/pkg/front_end/testcases/redirecting_factory.dart.outline.expect b/pkg/front_end/testcases/redirecting_factory.dart.outline.expect
index cf3b45076b10d6fc4bd73d3fb9e5b45da3c63d46..88ef2c77e1f1254635c7708e1ba55f6d0f88f04e 100644
--- a/pkg/front_end/testcases/redirecting_factory.dart.outline.expect
+++ b/pkg/front_end/testcases/redirecting_factory.dart.outline.expect
@@ -6,12 +6,12 @@ abstract class FooBase<Tf extends core::Object> extends core::Object {
   static field dynamic _redirecting# = <dynamic>[self::FooBase::•];
   abstract get x() → core::int;
   static factory •<Tf extends core::Object>(core::int x) → self::FooBase<self::FooBase::•::Tf>
-    let final dynamic #t1 = self::Foo::• in invalid-expression;
+    let dynamic #redirecting_factory = self::Foo::• in invalid-expression;
 }
 abstract class Foo<T extends core::Object> extends core::Object implements self::FooBase<dynamic> {
   static field dynamic _redirecting# = <dynamic>[self::Foo::•];
   static factory •<T extends core::Object>(core::int x) → self::Foo<self::Foo::•::T>
-    let final dynamic #t2 = self::Bar::• in invalid-expression;
+    let dynamic #redirecting_factory = self::Bar::• in invalid-expression;
 }
 class Bar<Sb extends core::Object, Tb extends core::Object> extends core::Object implements self::Foo<self::Bar::Tb> {
   field core::int x;
@@ -27,12 +27,12 @@ class Builder<X extends core::Object> extends core::Object {
 class SimpleCase<A extends core::Object, B extends core::Object> extends core::Object {
   static field dynamic _redirecting# = <dynamic>[self::SimpleCase::•];
   static factory •<A extends core::Object, B extends core::Object>() → self::SimpleCase<self::SimpleCase::•::A, self::SimpleCase::•::B>
-    let final dynamic #t3 = self::SimpleCaseImpl::• in invalid-expression;
+    let dynamic #redirecting_factory = self::SimpleCaseImpl::• in invalid-expression;
 }
 class SimpleCaseImpl<Ai extends core::Object, Bi extends core::Object> extends core::Object implements self::SimpleCase<self::SimpleCaseImpl::Ai, self::SimpleCaseImpl::Bi> {
   static field dynamic _redirecting# = <dynamic>[self::SimpleCaseImpl::•];
   static factory •<Ai extends core::Object, Bi extends core::Object>() → self::SimpleCaseImpl<self::SimpleCaseImpl::•::Ai, self::SimpleCaseImpl::•::Bi>
-    let final dynamic #t4 = self::SimpleCaseImpl2::• in invalid-expression;
+    let dynamic #redirecting_factory = self::SimpleCaseImpl2::• in invalid-expression;
 }
 class SimpleCaseImpl2<Ai2 extends core::Object, Bi2 extends core::Object> extends core::Object implements self::SimpleCaseImpl<self::SimpleCaseImpl2::Ai2, self::SimpleCaseImpl2::Bi2> {
   constructor •() → void