[inspector] async stacks for Promise.then calls...

src/runtime/runtime-promise.cc

Index: src/runtime/runtime-promise.cc
diff --git a/src/runtime/runtime-promise.cc b/src/runtime/runtime-promise.cc
index f609df73fd6e7864266e54e640291a14ecefaca2..47332544a5949427a71bffd2502b0add0ac19be1 100644
--- a/src/runtime/runtime-promise.cc
+++ b/src/runtime/runtime-promise.cc
@@ -69,8 +69,8 @@ void EnqueuePromiseReactionJob(Isolate* isolate, Handle<JSPromise> promise,
     if (deferred->IsFixedArray()) {
       deferred_obj = isolate->factory()->undefined_value();
     }
-
-    Handle<Object> argv[] = {deferred_obj, status};
+    Handle<Object> argv[] = {deferred_obj, status,
+                             isolate->debug()->NextAsyncTaskId(promise)};
     maybe_result = Execution::TryCall(
         isolate, isolate->promise_debug_get_info(),
         isolate->factory()->undefined_value(), arraysize(argv), argv);
@@ -104,6 +104,14 @@ void PromiseSet(Isolate* isolate, Handle<JSPromise> promise, int status,
 
 void PromiseFulfill(Isolate* isolate, Handle<JSPromise> promise,
                     Handle<Smi> status, Handle<Object> value) {
+  if (isolate->debug()->is_active()) {
+    isolate->debug()->OnAsyncTaskEvent(
+        debug::EnqueueRecurring, isolate->debug()->NextAsyncTaskId(promise),
+        status->value() == kPromiseFulfilled
+            ? isolate->factory()->PromiseResolve_string()
+            : isolate->factory()->PromiseReject_string());
+  }
+
   // Check if there are any callbacks.
   if (!promise->deferred()->IsUndefined(isolate)) {
     Handle<Object> tasks((status->value() == kPromiseFulfilled)
@@ -171,12 +179,8 @@ RUNTIME_FUNCTION(Runtime_EnqueuePromiseResolveThenableJob) {
 
   Handle<Object> debug_id, debug_name;
   if (isolate->debug()->is_active()) {
-    debug_id =
-        handle(Smi::FromInt(isolate->GetNextDebugMicrotaskId()), isolate);
+    debug_id = isolate->debug()->NextAsyncTaskId(promise);
     debug_name = isolate->factory()->PromiseResolveThenableJob_string();
-    isolate->debug()->OnAsyncTaskEvent(isolate->factory()->enqueue_string(),
-                                       debug_id,
-                                       Handle<String>::cast(debug_name));
   } else {
     debug_id = isolate->factory()->undefined_value();
     debug_name = isolate->factory()->undefined_value();