Deprecate Promise::Chain from V8 APIs

src/api.cc

Index: src/api.cc
diff --git a/src/api.cc b/src/api.cc
index 29e417c8d527b3d16e2fc1a97f631aafab5670b7..38d641dd99bfac3280f4b6185d74d44e2d9a042c 100644
--- a/src/api.cc
+++ b/src/api.cc
@@ -6461,10 +6461,12 @@ void Promise::Resolver::Reject(Local<Value> value) {
 }
 
 
-MaybeLocal<Promise> Promise::Chain(Local<Context> context,
-                                   Local<Function> handler) {
+namespace {
+
+MaybeLocal<Promise> DoChain(Value* value, Local<Context> context,
+                            Local<Function> handler) {
   PREPARE_FOR_EXECUTION(context, "Promise::Chain", Promise);
-  auto self = Utils::OpenHandle(this);
+  auto self = Utils::OpenHandle(value);
   i::Handle<i::Object> argv[] = {Utils::OpenHandle(*handler)};
   i::Handle<i::Object> result;
   has_pending_exception = !i::Execution::Call(isolate, isolate->promise_chain(),
@@ -6474,10 +6476,18 @@ MaybeLocal<Promise> Promise::Chain(Local<Context> context,
   RETURN_ESCAPED(Local<Promise>::Cast(Utils::ToLocal(result)));
 }
 
+}  // namespace
+
+
+MaybeLocal<Promise> Promise::Chain(Local<Context> context,
+                                   Local<Function> handler) {
+  return DoChain(this, context, handler);
+}
+
 
 Local<Promise> Promise::Chain(Local<Function> handler) {
   auto context = ContextFromHeapObject(Utils::OpenHandle(this));
-  RETURN_TO_LOCAL_UNCHECKED(Chain(context, handler), Promise);
+  RETURN_TO_LOCAL_UNCHECKED(DoChain(this, context, handler), Promise);
 }