[inspector] run microtasks after async Runtime.evaluate

src/inspector/v8-runtime-agent-impl.cc

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 60 matching lines @@
                   bool returnByValue, bool generatePreview,
                   std::unique_ptr<Callback> callback) {
     if (value.IsEmpty()) {
       callback->sendFailure("Internal error");
       return;
     }
     if (!value.ToLocalChecked()->IsPromise()) {
       callback->sendFailure(notPromiseError);
       return;
     }
+    v8::MicrotasksScope microtasks_scope(inspector->isolate(),
+                                         v8::MicrotasksScope::kRunMicrotasks);
     v8::Local<v8::Promise> promise =
         v8::Local<v8::Promise>::Cast(value.ToLocalChecked());
     Callback* rawCallback = callback.get();
     ProtocolPromiseHandler<Callback>* handler = new ProtocolPromiseHandler(
         inspector, contextGroupId, executionContextId, objectGroup,
         returnByValue, generatePreview, std::move(callback));
     v8::Local<v8::Value> wrapper = handler->m_wrapper.Get(inspector->isolate());
 
     v8::Local<v8::Function> thenCallbackFunction =
         v8::Function::New(context, thenCallback, wrapper, 0,
@@ skipping 630 matching lines @@
 }
 
 bool V8RuntimeAgentImpl::reportMessage(V8ConsoleMessage* message,
                                        bool generatePreview) {
   message->reportToFrontend(&m_frontend, m_session, generatePreview);
   m_frontend.flush();
   return m_inspector->hasConsoleMessageStorage(m_session->contextGroupId());
 }
 
 }  // namespace v8_inspector