Update rasta direct expectations.

pkg/front_end/test/fasta/rasta/generic_factory.dart.direct.expect

 library;
 import self as self;
 import "dart:core" as core;
 
 class C1 extends core::Object {
-  constructor •() → self::C1
-    : super core::Object::•();
+  constructor •() → void
+    : super core::Object::•()
+    ;
 }
 class C2 extends core::Object {
-  constructor •() → self::C2
-    : super core::Object::•();
+  constructor •() → void
+    : super core::Object::•()
+    ;
 }
 class C3 extends core::Object {
-  constructor •() → self::C3
-    : super core::Object::•();
+  constructor •() → void
+    : super core::Object::•()
+    ;
 }
 class A<T extends core::Object> extends core::Object {
-  constructor internal() → dynamic
+  constructor internal() → void
     : super core::Object::•()
     ;
   static factory a<T extends core::Object>() → self::A<self::A::a::T>
     invalid-statement;
   static factory b<T extends core::Object>() → self::A<self::A::b::T>
     invalid-statement;
   static factory c<T extends core::Object>() → self::A<self::A::c::T>
-    invalid-statement;
+    throw "Missing constructor: Missing";
 }
 class B<S extends core::Object> extends self::A<self::B::S> {
-  constructor internal() → dynamic
+  constructor internal() → void
     : super self::A::internal()
     ;
   static factory a<S extends core::Object>() → self::B<self::B::a::S>
     invalid-statement;
   static factory b<S extends core::Object>() → self::B<self::B::b::S>
     invalid-statement;
 }
 class C<U extends core::Object> extends self::B<self::C::U> {
-  constructor •() → dynamic
+  constructor •() → void
     : super self::B::internal()
     ;
 }
 static method main() → dynamic {
   new self::C::•<self::C3>();
   new self::C::•<self::C1>();
   new self::C::•<self::C3>();
   new self::C::•<self::C2>();
-  invalid-expression.call();
+  self::A::c<self::C3>();
 }