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

src/objects-debug.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/objects.h"
 
 #include "src/bootstrapper.h"
 #include "src/disasm.h"
 #include "src/disassembler.h"
 #include "src/field-type.h"
@@ skipping 904 matching lines @@
   value()->ObjectVerify();
 }
 
 void PromiseResolveThenableJobInfo::PromiseResolveThenableJobInfoVerify() {
   Isolate* isolate = GetIsolate();
   CHECK(IsPromiseResolveThenableJobInfo());
   CHECK(thenable()->IsJSReceiver());
   CHECK(then()->IsJSReceiver());
   CHECK(resolve()->IsJSFunction());
   CHECK(reject()->IsJSFunction());
-  CHECK(before_debug_event()->IsJSObject() ||
-        before_debug_event()->IsUndefined(isolate));
-  CHECK(after_debug_event()->IsJSObject() ||
-        after_debug_event()->IsUndefined(isolate));
+  CHECK(debug_id()->IsNumber() || debug_id()->IsUndefined(isolate));
+  CHECK(debug_name()->IsString() || debug_name()->IsUndefined(isolate));
 }
 
 void PromiseReactionJobInfo::PromiseReactionJobInfoVerify() {
   Isolate* isolate = GetIsolate();
   CHECK(IsPromiseReactionJobInfo());
   CHECK(value()->IsObject());
   CHECK(tasks()->IsJSArray() || tasks()->IsCallable());
   CHECK(deferred()->IsJSObject() || deferred()->IsUndefined(isolate));
-  CHECK(before_debug_event()->IsJSObject() ||
-        before_debug_event()->IsUndefined(isolate));
-  CHECK(after_debug_event()->IsJSObject() ||
-        after_debug_event()->IsUndefined(isolate));
+  CHECK(debug_id()->IsNumber() || debug_id()->IsUndefined(isolate));
+  CHECK(debug_name()->IsString() || debug_name()->IsUndefined(isolate));
   CHECK(context()->IsContext());
 }
 
 void JSModuleNamespace::JSModuleNamespaceVerify() {
   CHECK(IsJSModuleNamespace());
   module()->ObjectVerify();
 }
 
 void JSFixedArrayIterator::JSFixedArrayIteratorVerify() {
   CHECK(IsJSFixedArrayIterator());
@@ skipping 457 matching lines @@
 
   // Both are done at the same time.
   CHECK_EQ(new_it.done(), old_it.done());
 }
 
 
 #endif  // DEBUG
 
 }  // namespace internal
 }  // namespace v8