rewrite this in shadowed functions inside native derived class constructors - fixes #1340

test/core/fixtures/transformation/es6.classes/native-constructors/actual.js

@@ -8,3 +8,10 @@ class Bar extends Array {
     this.foo = "bar";
   }
 }
+
+class Baz extends Array {
+  constructor() {
+    super();
+    (() => this)
+  }
+}

test/core/fixtures/transformation/es6.classes/native-constructors/expected.js

@@ -33,3 +33,21 @@ var Bar = (function (_Array2) {
   babelHelpers.inherits(Bar, _Array2);
   return Bar;
 })(Array);
+
+var Baz = (function (_Array3) {
+  function Baz() {
+    babelHelpers.classCallCheck(this, Baz);
+
+    var _this3 = new _Array3();
+
+    _this3.__proto__ = Baz.prototype;
+
+    (function () {
+      return _this3;
+    });
+    return _this3;
+  }
+
+  babelHelpers.inherits(Baz, _Array3);
+  return Baz;
+})(Array);