[promises] Move CreateResolvingFunctions to c++

src/factory.cc

Index: src/factory.cc
diff --git a/src/factory.cc b/src/factory.cc
index 564f821c42875dd1e14e68d0344678b1fe9f8dc0..c298a2a25ad3089f04fd921a4e58411d459136c9 100644
--- a/src/factory.cc
+++ b/src/factory.cc
@@ -962,6 +962,13 @@ Handle<Context> Factory::NewBlockContext(Handle<JSFunction> function,
   return context;
 }
 
+Handle<Context> Factory::NewPromiseResolvingFunctionContext() {
+  Handle<FixedArray> array = NewFixedArray(Context::MIN_CONTEXT_SLOTS + 3);

[adamk, 2016/11/09 00:06:23]

Please pass in this 3; I think we should be able to define it as part of the
enum in builtins-promise.cc.

[gsathya, 2016/11/09 00:57:33]

Done.

+  array->set_map_no_write_barrier(*function_context_map());
+  Handle<Context> context = Handle<Context>::cast(array);
+  context->set_extension(*the_hole_value());
+  return context;
+}
 
 Handle<Struct> Factory::NewStruct(InstanceType type) {
   CALL_HEAP_FUNCTION(