harmony_scoping: Implement lexical bindings at top level

src/bootstrapper.cc

Index: src/bootstrapper.cc
diff --git a/src/bootstrapper.cc b/src/bootstrapper.cc
index 264d1c6faf0ffd9daf8ae3024dd3e2bef1c4b74a..060dd37f6a0d340ae1d48441f720b1b5438814c0 100644
--- a/src/bootstrapper.cc
+++ b/src/bootstrapper.cc
@@ -908,6 +908,10 @@ void Genesis::InitializeGlobal(Handle<GlobalObject> global_object,
   Factory* factory = isolate->factory();
   Heap* heap = isolate->heap();
 
+  Handle<GlobalContextTable> global_context_table =
+      factory->NewGlobalContextTable(0);
+  native_context()->set_global_context_table(*global_context_table);
+
   Handle<String> object_name = factory->Object_string();
   JSObject::AddProperty(
       global_object, object_name, isolate->object_function(), DONT_ENUM);