Make Map::MapVerify check that deprecated implies not-stable

Change-Id: I4c86ede2e1f423d0faf5dde28bb435d5c99f9144
Reviewed-on: https://chromium-review.googlesource.com/c/1462962Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Commit-Queue: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59497}

src/objects-debug.cc

@@ -667,6 +667,7 @@ void Map::MapVerify(Isolate* isolate) {
   CHECK_IMPLIES(IsJSObjectMap() && !CanHaveFastTransitionableElementsKind(),
                 IsDictionaryElementsKind(elements_kind()) ||
                     IsTerminalElementsKind(elements_kind()));
+  CHECK_IMPLIES(is_deprecated(), !is_stable());
   if (is_prototype_map()) {
     DCHECK(prototype_info() == Smi::kZero ||
            prototype_info()->IsPrototypeInfo());