[promises] Port ResolvePromise to TF

src/promise-utils.h

Index: src/promise-utils.h
diff --git a/src/promise-utils.h b/src/promise-utils.h
index 6ed6fcde5f2188c4668fc7330cb70613d5719c3b..2748853f86a09d8957af3c851ba575b2799c0346 100644
--- a/src/promise-utils.h
+++ b/src/promise-utils.h
@@ -5,6 +5,7 @@
 #ifndef V8_PROMISE_UTILS_H_
 #define V8_PROMISE_UTILS_H_
 
+#include "src/contexts.h"
 #include "src/objects.h"
 
 namespace v8 {
@@ -13,6 +14,13 @@ namespace internal {
 // Helper methods for Promise builtins.
 class PromiseUtils : public AllStatic {
  public:
+  enum PromiseResolvingFunctionContextSlot {
+    kAlreadyVisitedSlot = Context::MIN_CONTEXT_SLOTS,
+    kPromiseSlot,
+    kDebugEventSlot,
+    kPromiseContextLength,
+  };
+
   // These get and set the slots on the PromiseResolvingContext, which
   // is used by the resolve/reject promise callbacks.
   static JSObject* GetPromise(Handle<Context> context);