Trace where timers were scheduled in Blink

Source/modules/geolocation/testing/GeolocationClientMock.cpp

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  * Copyright (C) 2012 Apple 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.
@@ skipping 86 matching lines @@
     // Called from Geolocation::disconnectFrame() in response to LocalFrame destruction.
     m_pendingPermissions.remove(geolocation);
     if (m_pendingPermissions.isEmpty() && m_permissionTimer.isActive())
         m_permissionTimer.stop();
 }
 
 void GeolocationClientMock::asyncUpdatePermission()
 {
     ASSERT(m_permissionState != PermissionStateUnset);
     if (!m_permissionTimer.isActive())
-        m_permissionTimer.startOneShot(0);
+        m_permissionTimer.startOneShot(0, FROM_HERE);
 }
 
 void GeolocationClientMock::permissionTimerFired(Timer<GeolocationClientMock>* timer)
 {
     ASSERT_UNUSED(timer, timer == &m_permissionTimer);
     ASSERT(m_permissionState != PermissionStateUnset);
     bool allowed = m_permissionState == PermissionStateAllowed;
     GeolocationSet::iterator end = m_pendingPermissions.end();
 
     // Once permission has been set (or denied) on a Geolocation object, there can be
@@ skipping 32 matching lines @@
 
 GeolocationPosition* GeolocationClientMock::lastPosition()
 {
     return m_lastPosition.get();
 }
 
 void GeolocationClientMock::asyncUpdateController()
 {
     ASSERT(m_controller);
     if (m_isActive && !m_controllerTimer.isActive())
-        m_controllerTimer.startOneShot(0);
+        m_controllerTimer.startOneShot(0, FROM_HERE);
 }
 
 void GeolocationClientMock::controllerTimerFired(Timer<GeolocationClientMock>* timer)
 {
     ASSERT_UNUSED(timer, timer == &m_controllerTimer);
     ASSERT(m_controller);
 
     if (m_lastPosition.get()) {
         ASSERT(!m_hasError);
         m_controller->positionChanged(m_lastPosition.get());
     } else if (m_hasError) {
         m_controller->errorOccurred(GeolocationError::create(GeolocationError::PositionUnavailable, m_errorMessage).get());
     }
 }
 
 void GeolocationClientMock::clearError()
 {
     m_hasError = false;
     m_errorMessage = String();
 }
 
 } // WebCore