[inspector] migrate AsycEvent to tupple

src/debug/debug.cc

Index: src/debug/debug.cc
diff --git a/src/debug/debug.cc b/src/debug/debug.cc
index 04f6a1f281e3c5e4a13d12923b65824abac7258e..a41033f98308ad342de655ac4e897fad0924200c 100644
--- a/src/debug/debug.cc
+++ b/src/debug/debug.cc
@@ -1846,10 +1846,18 @@ void Debug::OnAsyncTaskEvent(debug::AsyncTaskEventType type, Handle<Object> id,
   DebugScope debug_scope(this);
   if (debug_scope.failed()) return;
 
+  Handle<Smi> type_smi(Smi::FromInt(type), isolate_);
+  if (event_listener_.is_null()) {
+    ProcessDebugEvent(v8::AsyncTaskEvent,
+                      Handle<JSObject>::cast(
+                          isolate_->factory()->NewTuple3(type_smi, id, name)),
+                      true);
+    return;
+  }
+
   // Create the script collected state object.
   Handle<Object> event_data;
   // Bail out and don't call debugger if exception.
-  Handle<Smi> type_smi(Smi::FromInt(type), isolate_);
   if (!MakeAsyncTaskEvent(type_smi, id, name).ToHandle(&event_data)) return;
 
   // Process debug event.