Provide accessor for object internal properties that doesn't require debugger to be active

src/contexts.h

Index: src/contexts.h
diff --git a/src/contexts.h b/src/contexts.h
index 066e8a1ec33a86126a5fdaf39e5b16d5d5a9d796..f120788609f2d748ed0015684cc0f91f0900d899 100644
--- a/src/contexts.h
+++ b/src/contexts.h
@@ -157,6 +157,7 @@ enum BindingFlags {
   V(ERROR_MESSAGE_FOR_CODE_GEN_FROM_STRINGS_INDEX, Object,                     \
     error_message_for_code_gen_from_strings)                                   \
   V(PROMISE_STATUS_INDEX, Symbol, promise_status)                              \
+  V(PROMISE_VALUE_INDEX, Symbol, promise_value)                                \
   V(PROMISE_CREATE_INDEX, JSFunction, promise_create)                          \
   V(PROMISE_RESOLVE_INDEX, JSFunction, promise_resolve)                        \
   V(PROMISE_REJECT_INDEX, JSFunction, promise_reject)                          \
@@ -394,6 +395,7 @@ class Context: public FixedArray {
     RUN_MICROTASKS_INDEX,
     ENQUEUE_MICROTASK_INDEX,
     PROMISE_STATUS_INDEX,
+    PROMISE_VALUE_INDEX,
     PROMISE_CREATE_INDEX,
     PROMISE_RESOLVE_INDEX,
     PROMISE_REJECT_INDEX,