Check in codegen test expectations.

test/codegen/expect/language/private_mixin_exception_throw_test.js

Index: test/codegen/expect/language/private_mixin_exception_throw_test.js
diff --git a/test/codegen/expect/language/private_mixin_exception_throw_test.js b/test/codegen/expect/language/private_mixin_exception_throw_test.js
new file mode 100644
index 0000000000000000000000000000000000000000..5490fdf8c08a228718d4e86e47ea81ed9fce1591
--- /dev/null
+++ b/test/codegen/expect/language/private_mixin_exception_throw_test.js
@@ -0,0 +1,42 @@
+dart_library.library('language/private_mixin_exception_throw_test', null, /* Imports */[
+  'dart_sdk'
+], function load__private_mixin_exception_throw_test(exports, dart_sdk) {
+  'use strict';
+  const core = dart_sdk.core;
+  const dart = dart_sdk.dart;
+  const dartx = dart_sdk.dartx;
+  const private_mixin_exception_throw_test = Object.create(null);
+  let VoidTodynamic = () => (VoidTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [])))();
+  private_mixin_exception_throw_test._C = class _C extends core.Object {};
+  private_mixin_exception_throw_test._E = class _E extends core.Object {
+    throwIt() {
+      return dart.throw("it");
+    }
+  };
+  dart.setSignature(private_mixin_exception_throw_test._E, {
+    methods: () => ({throwIt: dart.definiteFunctionType(dart.dynamic, [])})
+  });
+  private_mixin_exception_throw_test._F = class _F extends core.Object {
+    throwIt() {
+      return dart.throw("IT");
+    }
+  };
+  dart.setSignature(private_mixin_exception_throw_test._F, {
+    methods: () => ({throwIt: dart.definiteFunctionType(dart.dynamic, [])})
+  });
+  private_mixin_exception_throw_test._D = class _D extends dart.mixin(private_mixin_exception_throw_test._C, private_mixin_exception_throw_test._E, private_mixin_exception_throw_test._F) {};
+  private_mixin_exception_throw_test.main = function() {
+    let d = new private_mixin_exception_throw_test._D();
+    try {
+      d.throwIt();
+    } catch (e) {
+      let s = dart.stackTrace(e);
+      core.print(dart.str`Exception: ${e}`);
+      core.print(dart.str`Stacktrace:\n${s}`);
+    }
+
+  };
+  dart.fn(private_mixin_exception_throw_test.main, VoidTodynamic());
+  // Exports:
+  exports.private_mixin_exception_throw_test = private_mixin_exception_throw_test;
+});