[DevTools] added creation stack for event listeners without scheduled stack

third_party/WebKit/Source/core/inspector/ThreadDebugger.h

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef ThreadDebugger_h
 #define ThreadDebugger_h
 
 #include <memory>
 #include "core/CoreExport.h"
 #include "core/inspector/ConsoleTypes.h"
@@ skipping 27 matching lines @@
   }
 
   static void IdleStarted(v8::Isolate*);
   static void IdleFinished(v8::Isolate*);
 
   void AsyncTaskScheduled(const String& task_name, void* task, bool recurring);
   void AsyncTaskCanceled(void* task);
   void AllAsyncTasksCanceled();
   void AsyncTaskStarted(void* task);
   void AsyncTaskFinished(void* task);
+  bool IsRunningAsyncTask() const { return current_async_tasks_; }
   unsigned PromiseRejected(v8::Local<v8::Context>,
                            const String& error_message,
                            v8::Local<v8::Value> exception,
                            std::unique_ptr<SourceLocation>);
   void PromiseRejectionRevoked(v8::Local<v8::Context>,
                                unsigned promise_rejection_id);
 
  protected:
   virtual int ContextGroupId(ExecutionContext*) = 0;
   virtual void ReportConsoleMessage(ExecutionContext*,
@@ skipping 45 matching lines @@
 
   static void GetEventListenersCallback(
       const v8::FunctionCallbackInfo<v8::Value>&);
 
   std::unique_ptr<v8_inspector::V8Inspector> v8_inspector_;
   std::unique_ptr<v8::TracingCpuProfiler> v8_tracing_cpu_profiler_;
   Vector<std::unique_ptr<Timer<ThreadDebugger>>> timers_;
   Vector<v8_inspector::V8InspectorClient::TimerCallback> timer_callbacks_;
   Vector<void*> timer_data_;
   std::unique_ptr<UserGestureIndicator> user_gesture_indicator_;
+
+  int current_async_tasks_ = 0;
 };
 
 }  // namespace blink
 
 #endif  // ThreadDebugger_h