Trace where timers were scheduled in Blink

Source/core/page/EventSource.cpp

 /*
  * Copyright (C) 2009, 2012 Ericsson AB. All rights reserved.
  * Copyright (C) 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2011, Code Aurora Forum. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1. Redistributions of source code must retain the above copyright
@@ skipping 99 matching lines @@
 {
     ASSERT(m_state == CLOSED);
     ASSERT(!m_requestInFlight);
 }
 
 void EventSource::scheduleInitialConnect()
 {
     ASSERT(m_state == CONNECTING);
     ASSERT(!m_requestInFlight);
 
-    m_connectTimer.startOneShot(0);
+    m_connectTimer.startOneShot(0, FROM_HERE);
 }
 
 void EventSource::connect()
 {
     ASSERT(m_state == CONNECTING);
     ASSERT(!m_requestInFlight);
 
     ResourceRequest request(m_url);
     request.setHTTPMethod("GET");
     request.setHTTPHeaderField("Accept", "text/event-stream");
@@ skipping 28 matching lines @@
 
     if (m_state != CLOSED)
         scheduleReconnect();
     else
         unsetPendingActivity(this);
 }
 
 void EventSource::scheduleReconnect()
 {
     m_state = CONNECTING;
-    m_connectTimer.startOneShot(m_reconnectDelay / 1000.0);
+    m_connectTimer.startOneShot(m_reconnectDelay / 1000.0, FROM_HERE);
     dispatchEvent(Event::create(EventTypeNames::error));
 }
 
 void EventSource::connectTimerFired(Timer<EventSource>*)
 {
     connect();
 }
 
 String EventSource::url() const
 {
@@ skipping 246 matching lines @@
 
 PassRefPtr<MessageEvent> EventSource::createMessageEvent()
 {
     RefPtr<MessageEvent> event = MessageEvent::create();
     event->initMessageEvent(m_eventName.isEmpty() ? EventTypeNames::message : m_eventName, false, false, SerializedScriptValue::create(String(m_data)), m_eventStreamOrigin, m_lastEventId, 0, nullptr);
     m_data.clear();
     return event.release();
 }
 
 } // namespace WebCore