Don't reflect ES2015 Function name inference in Function.prototype.toString

test/mjsunit/harmony/function-name.js

Index: test/mjsunit/harmony/function-name.js
diff --git a/test/mjsunit/harmony/function-name.js b/test/mjsunit/harmony/function-name.js
index 5265c2d22a2fd6dd4b39e4c3a11e3058e1160bee..7bb1f6ae01e59c107e0f99ef8766ea3e5942016f 100644
--- a/test/mjsunit/harmony/function-name.js
+++ b/test/mjsunit/harmony/function-name.js
@@ -357,3 +357,17 @@
   var obj = { ['foo']: factory() };
   assertEquals('', obj.foo.name);
 })();
+
+
+(function testNameNotReflectedInToString() {
+  var f = function() {};
+  var g = function*() {};
+  var obj = {
+    ['h']: function() {},
+    i: () => {}
+  };
+  assertEquals('function () {}', f.toString());
+  assertEquals('function* () {}', g.toString());
+  assertEquals('function () {}', obj.h.toString());
+  assertEquals('() => {}', obj.i.toString());
+})();