[promises] Move async debug event creation to c++

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index 195646637356c224cb223202932841208ea9a4e5..0adfdf7461c929fb7d587553720a16eec5d41fe3 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -6751,17 +6751,16 @@ class PromiseResolveThenableJobInfo : public Struct {
   DECL_ACCESSORS(then, JSReceiver)
   DECL_ACCESSORS(resolve, JSFunction)
   DECL_ACCESSORS(reject, JSFunction)
-  DECL_ACCESSORS(before_debug_event, Object)
-  DECL_ACCESSORS(after_debug_event, Object)
+  DECL_ACCESSORS(debug_id, Object)
+  DECL_ACCESSORS(debug_name, Object)
 
   static const int kThenableOffset = Struct::kHeaderSize;
   static const int kThenOffset = kThenableOffset + kPointerSize;
   static const int kResolveOffset = kThenOffset + kPointerSize;
   static const int kRejectOffset = kResolveOffset + kPointerSize;
-  static const int kBeforeDebugEventOffset = kRejectOffset + kPointerSize;
-  static const int kAfterDebugEventOffset =
-      kBeforeDebugEventOffset + kPointerSize;
-  static const int kSize = kAfterDebugEventOffset + kPointerSize;
+  static const int kDebugIdOffset = kRejectOffset + kPointerSize;
+  static const int kDebugNameOffset = kDebugIdOffset + kPointerSize;
+  static const int kSize = kDebugNameOffset + kPointerSize;
 
   DECLARE_CAST(PromiseResolveThenableJobInfo)
   DECLARE_PRINTER(PromiseResolveThenableJobInfo)
@@ -6777,17 +6776,16 @@ class PromiseReactionJobInfo : public Struct {
   DECL_ACCESSORS(value, Object)
   DECL_ACCESSORS(tasks, Object)
   DECL_ACCESSORS(deferred, Object)
-  DECL_ACCESSORS(before_debug_event, Object)
-  DECL_ACCESSORS(after_debug_event, Object)
+  DECL_ACCESSORS(debug_id, Object)
+  DECL_ACCESSORS(debug_name, Object)
   DECL_ACCESSORS(context, Context)
 
   static const int kValueOffset = Struct::kHeaderSize;
   static const int kTasksOffset = kValueOffset + kPointerSize;
   static const int kDeferredOffset = kTasksOffset + kPointerSize;
-  static const int kBeforeDebugEventOffset = kDeferredOffset + kPointerSize;
-  static const int kAfterDebugEventOffset =
-      kBeforeDebugEventOffset + kPointerSize;
-  static const int kContextOffset = kAfterDebugEventOffset + kPointerSize;
+  static const int kDebugIdOffset = kDeferredOffset + kPointerSize;
+  static const int kDebugNameOffset = kDebugIdOffset + kPointerSize;
+  static const int kContextOffset = kDebugNameOffset + kPointerSize;
   static const int kSize = kContextOffset + kPointerSize;
 
   DECLARE_CAST(PromiseReactionJobInfo)