Check in codegen test expectations.

test/codegen/expect/language/gc_test.js

+dart_library.library('language/gc_test', null, /* Imports */[
+  'dart_sdk'
+], function load__gc_test(exports, dart_sdk) {
+  'use strict';
+  const core = dart_sdk.core;
+  const dart = dart_sdk.dart;
+  const dartx = dart_sdk.dartx;
+  const gc_test = Object.create(null);
+  let dynamicTodynamic = () => (dynamicTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [dart.dynamic])))();
+  let VoidTodynamic = () => (VoidTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [])))();
+  gc_test.main = function() {
+    let div = null;
+    for (let i = 0; i < 200; ++i) {
+      let l = core.List.new(1000000);
+      let m = 2;
+      div = dart.fn(_ => {
+        let b = l;
+      }, dynamicTodynamic());
+      let lSmall = core.List.new(3);
+      lSmall[dartx.set](0, l);
+      l[dartx.set](0, lSmall);
+    }
+  };
+  dart.fn(gc_test.main, VoidTodynamic());
+  // Exports:
+  exports.gc_test = gc_test;
+});