[promises] Move PromiseReactionJob to c++

src/factory.cc

Index: src/factory.cc
diff --git a/src/factory.cc b/src/factory.cc
index 075ea0cdeb38bba4ab2c08728dab9b4153efa445..64dea9dd08883d78b129dd7d3915d2dfa5e04af9 100644
--- a/src/factory.cc
+++ b/src/factory.cc
@@ -937,6 +937,21 @@ Handle<PromiseContainer> Factory::NewPromiseContainer(
   return result;
 }
 
+Handle<PromiseHandleInfo> Factory::NewPromiseHandleInfo(
+    Handle<Object> value, Handle<Object> tasks, Handle<Object> deferreds,
+    Handle<Object> before_debug_event, Handle<Object> after_debug_event,
+    Handle<JSFunction> reaction_context) {
+  Handle<PromiseHandleInfo> result =
+      Handle<PromiseHandleInfo>::cast(NewStruct(PROMISE_HANDLE_INFO_TYPE));
+  result->set_value(*value);
+  result->set_tasks(*tasks);
+  result->set_deferreds(*deferreds);
+  result->set_before_debug_event(*before_debug_event);
+  result->set_after_debug_event(*after_debug_event);
+  result->set_reaction_context(*reaction_context);
+  return result;
+}
+
 Handle<AliasedArgumentsEntry> Factory::NewAliasedArgumentsEntry(
     int aliased_context_slot) {
   Handle<AliasedArgumentsEntry> entry = Handle<AliasedArgumentsEntry>::cast(