Apply transformations after comparing to golden files.

pkg/front_end/testcases/inference/future_union_downwards_2.dart.strong.expect

 library test;
 import self as self;
 import "dart:core" as core;
 import "dart:async" as asy;
 
 class MyFuture<T extends core::Object> extends core::Object implements asy::Future<self::MyFuture::T> {
   constructor •() → void
     : super core::Object::•() {}
   constructor value([dynamic x = null]) → void
     : super core::Object::•() {}
   abstract method noSuchMethod(dynamic invocation) → dynamic;
   method then<S extends core::Object>((self::MyFuture::T) → asy::FutureOr<self::MyFuture::then::S> f, {core::Function onError = null}) → self::MyFuture<self::MyFuture::then::S>
     return null;
 }
 static field self::MyFuture<dynamic> f;
 static field asy::Future<core::int> t1 = self::f.{self::MyFuture::then}<core::int>((dynamic _) → self::MyFuture<core::int> => new self::MyFuture::value<core::int>("hi"));
 static field asy::Future<core::List<core::int>> t2 = self::f.{self::MyFuture::then}<core::List<core::int>>((dynamic _) → core::List<core::int> => <core::int>[3]);
-static method g2() → asy::Future<core::List<core::int>> /* originally async */ {
-  final asy::Completer<asy::FutureOr<core::List<core::int>>> :completer = asy::Completer::sync<asy::FutureOr<core::List<core::int>>>();
-  asy::FutureOr<core::List<core::int>> :return_value;
-  dynamic :async_op_then;
-  dynamic :async_op_error;
-  dynamic :await_jump_var = 0;
-  dynamic :await_ctx_var;
-  function :async_op([dynamic :result, dynamic :exception, dynamic :stack_trace]) → dynamic yielding 
-    try {
-      #L1:
-      {
-        :return_value = <core::int>[3];
-        break #L1;
-      }
-      :completer.complete(:return_value);
-      return;
-    }
-    on dynamic catch(dynamic :exception, dynamic :stack_trace) {
-      :completer.completeError(:exception, :stack_trace);
-    }
-  :async_op_then = asy::_asyncThenWrapperHelper(:async_op);
-  :async_op_error = asy::_asyncErrorWrapperHelper(:async_op);
-  asy::Future::microtask<dynamic>(:async_op);
-  return :completer.future;
+static method g2() → asy::Future<core::List<core::int>> async {
+  return <core::int>[3];
 }
-static method g3() → asy::Future<core::List<core::int>> /* originally async */ {
-  final asy::Completer<asy::FutureOr<core::List<core::int>>> :completer = asy::Completer::sync<asy::FutureOr<core::List<core::int>>>();
-  asy::FutureOr<core::List<core::int>> :return_value;
-  dynamic :async_op_then;
-  dynamic :async_op_error;
-  dynamic :await_jump_var = 0;
-  dynamic :await_ctx_var;
-  function :async_op([dynamic :result, dynamic :exception, dynamic :stack_trace]) → dynamic yielding 
-    try {
-      #L2:
-      {
-        :return_value = new self::MyFuture::value<core::List<core::int>>(<core::int>[3]);
-        break #L2;
-      }
-      :completer.complete(:return_value);
-      return;
-    }
-    on dynamic catch(dynamic :exception, dynamic :stack_trace) {
-      :completer.completeError(:exception, :stack_trace);
-    }
-  :async_op_then = asy::_asyncThenWrapperHelper(:async_op);
-  :async_op_error = asy::_asyncErrorWrapperHelper(:async_op);
-  asy::Future::microtask<dynamic>(:async_op);
-  return :completer.future;
+static method g3() → asy::Future<core::List<core::int>> async {
+  return new self::MyFuture::value<core::List<core::int>>(<core::int>[3]);
 }
 static method main() → dynamic {}