Enable ES6 generators

test/mjsunit/es6/generators-debug-liveedit.js

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// Flags: --expose-debug-as debug --harmony-generators
+// Flags: --expose-debug-as debug
 
 var Debug = debug.Debug;
 var LiveEdit = Debug.LiveEdit;
 
 unique_id = 0;
 
 var Generator = (function*(){}).constructor;
 
 function assertIteratorResult(value, done, result) {
   assertEquals({value: value, done: done}, result);
@@ skipping 94 matching lines @@
     // Patching inside a generator activation may succeed.
     patch(fun_inside, "'Cat'", "'Koala'");
   }
   iter = generator(function() { return fun_inside(attempt_fun_patches) });
   assertEquals('Cat',
                fun_outside(function () {
                  assertIteratorResult('Koala', false, iter.next());
                  assertTrue(fun_patch_restarted);
                }));
 })();