For-of calls [Symbol.iterator]() on RHS to get iterator

src/bootstrapper.cc

 // 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.
 
 #include "src/bootstrapper.h"
 
 #include "src/accessors.h"
 #include "src/isolate-inl.h"
 #include "src/natives.h"
 #include "src/snapshot.h"
@@ skipping 1603 matching lines @@
 }
 
 
 void Genesis::InstallExperimentalNativeFunctions() {
   if (FLAG_harmony_proxies) {
     INSTALL_NATIVE(JSFunction, "DerivedHasTrap", derived_has_trap);
     INSTALL_NATIVE(JSFunction, "DerivedGetTrap", derived_get_trap);
     INSTALL_NATIVE(JSFunction, "DerivedSetTrap", derived_set_trap);
     INSTALL_NATIVE(JSFunction, "ProxyEnumerate", proxy_enumerate);
   }
+
+  if (FLAG_harmony_symbols) {
+    INSTALL_NATIVE(Symbol, "symbolIterator", iterator_symbol);
+  }
 }
 
 #undef INSTALL_NATIVE
 
 
 Handle<JSFunction> Genesis::InstallInternalArray(
     Handle<JSBuiltinsObject> builtins,
     const char* name,
     ElementsKind elements_kind) {
   // --- I n t e r n a l   A r r a y ---
@@ skipping 1079 matching lines @@
   return from + sizeof(NestingCounterType);
 }
 
 
 // Called when the top-level V8 mutex is destroyed.
 void Bootstrapper::FreeThreadResources() {
   ASSERT(!IsActive());
 }
 
 } }  // namespace v8::internal