harmony_scoping: Implement lexical bindings at top level

src/factory.h

Index: src/factory.h
diff --git a/src/factory.h b/src/factory.h
index 9f9813cae0b2d9a41649f578a91baa5a32f9f91b..2a57ad51e6c2d71c30d755f6bcdaa4c60d6abb3f 100644
--- a/src/factory.h
+++ b/src/factory.h
@@ -229,6 +229,9 @@ class Factory FINAL {
   Handle<Context> NewGlobalContext(Handle<JSFunction> function,
                                    Handle<ScopeInfo> scope_info);
 
+  // Create an empty global context table.
+  Handle<GlobalContextTable> NewGlobalContextTable(int length);
+
   // Create a module context.
   Handle<Context> NewModuleContext(Handle<ScopeInfo> scope_info);