[builtins] move String.prototype[@@iterator] to C++ builtin

src/objects.cc

Index: src/objects.cc
diff --git a/src/objects.cc b/src/objects.cc
index 0f6ce61c06f0bd58af6bae4d9887c3cf8b1ac6c1..d0436bbeebb893f7ab33292fa54a389c62a86835 100644
--- a/src/objects.cc
+++ b/src/objects.cc
@@ -19493,5 +19493,11 @@ Handle<Object> JSModule::LoadExport(Handle<JSModule> module,
   return handle(cell->value(), isolate);
 }
 
+void JSIteratorResult::Initialize(Handle<JSIteratorResult> object,

[Benedikt Meurer, 2016/09/15 17:34:33]

This helper method seems a bit overkill; I'd propose to just inline the two
lines and remove the helper.

+                                  Handle<Object> value, Handle<Object> done) {
+  object->set_value(*value);
+  object->set_done(*done);
+}
+
 }  // namespace internal
 }  // namespace v8