[promises] Move PromiseResolveThenableJob to c++

src/objects-debug.cc

Index: src/objects-debug.cc
diff --git a/src/objects-debug.cc b/src/objects-debug.cc
index 7d426a045eb9b2584e22e207ee0607ca39191e7a..a472c12d37f754375453d8ff2dfcefe9d0e37c13 100644
--- a/src/objects-debug.cc
+++ b/src/objects-debug.cc
@@ -900,6 +900,14 @@ void Box::BoxVerify() {
   value()->ObjectVerify();
 }
 
+void PromiseContainer::PromiseContainerVerify() {
+  CHECK(IsPromiseContainer());
+  promise()->ObjectVerify();
+  thenable()->ObjectVerify();
+  VerifyPointer(then());
+  VerifyPointer(resolve());
+  VerifyPointer(reject());
+}
 
 void PrototypeInfo::PrototypeInfoVerify() {
   CHECK(IsPrototypeInfo());