Check in codegen test expectations.

test/codegen/expect/corelib/reg_exp_start_end_test.js

Index: test/codegen/expect/corelib/reg_exp_start_end_test.js
diff --git a/test/codegen/expect/corelib/reg_exp_start_end_test.js b/test/codegen/expect/corelib/reg_exp_start_end_test.js
new file mode 100644
index 0000000000000000000000000000000000000000..2cc37bb7b608d5b85e6e2195a750b4984ff81c3a
--- /dev/null
+++ b/test/codegen/expect/corelib/reg_exp_start_end_test.js
@@ -0,0 +1,28 @@
+dart_library.library('corelib/reg_exp_start_end_test', null, /* Imports */[
+  'dart_sdk',
+  'expect'
+], function load__reg_exp_start_end_test(exports, dart_sdk, expect) {
+  'use strict';
+  const core = dart_sdk.core;
+  const dart = dart_sdk.dart;
+  const dartx = dart_sdk.dartx;
+  const expect$ = expect.expect;
+  const reg_exp_start_end_test = Object.create(null);
+  let VoidTodynamic = () => (VoidTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [])))();
+  reg_exp_start_end_test.main = function() {
+    let matches = core.RegExp.new("(a(b)((c|de)+))").allMatches("abcde abcde abcde");
+    let it = matches[dartx.iterator];
+    let start = 0;
+    let end = 5;
+    while (dart.test(it.moveNext())) {
+      let match = it.current;
+      expect$.Expect.equals(start, match.start);
+      expect$.Expect.equals(end, match.end);
+      start = start + 6;
+      end = end + 6;
+    }
+  };
+  dart.fn(reg_exp_start_end_test.main, VoidTodynamic());
+  // Exports:
+  exports.reg_exp_start_end_test = reg_exp_start_end_test;
+});