Stop PingLoader's cancellation timer early.

third_party/WebKit/Source/core/loader/PingLoader.cpp

 /*
  * Copyright (C) 2010 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 146 matching lines @@
     if (m_loader)
         m_loader->cancel();
 }
 
 void PingLoader::dispose()
 {
     if (m_loader) {
         m_loader->cancel();
         m_loader = nullptr;
     }
+    m_timeout.stop();
     m_keepAlive.clear();
 }
 
 void PingLoader::didReceiveResponse(WebURLLoader*, const WebURLResponse& response)
 {
     if (LocalFrame* frame = this->frame()) {
         TRACE_EVENT_INSTANT1("devtools.timeline", "ResourceFinish", TRACE_EVENT_SCOPE_THREAD, "data", InspectorResourceFinishEvent::data(m_identifier, 0, true));
         const ResourceResponse& resourceResponse = response.toResourceResponse();
         InspectorInstrumentation::didReceiveResourceResponse(frame, m_identifier, 0, resourceResponse, 0);
         didFailLoading(frame);
@@ skipping 42 matching lines @@
     InspectorInstrumentation::didFailLoading(frame, m_identifier, ResourceError::cancelledError(m_url));
     frame->console().didFailLoading(m_identifier, ResourceError::cancelledError(m_url));
 }
 
 DEFINE_TRACE(PingLoader)
 {
     LocalFrameLifecycleObserver::trace(visitor);
 }
 
 } // namespace blink