[Async][WIP] Call FrameLoader::checkCompleted() asynchronously to avoid sync body.onload()

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

 /*
  * Copyright (C) 2013 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 326 matching lines @@
 
 void FrameFetchContext::willStartLoadingResource(ResourceRequest& request)
 {
     if (m_documentLoader)
         m_documentLoader->applicationCacheHost()->willStartLoadingResource(request);
 }
 
 void FrameFetchContext::didLoadResource(Resource* resource)
 {
     if (resource->isLoadEventBlockingResourceType())
-        frame()->loader().checkCompleted();
+        frame()->loader().checkCompleted(6);
 }
 
 void FrameFetchContext::addResourceTiming(const ResourceTimingInfo& info)
 {
     Document* initiatorDocument = m_document && info.isMainResource() ? m_document->parentDocument() : m_document.get();
     if (!initiatorDocument || !initiatorDocument->domWindow())
         return;
     DOMWindowPerformance::performance(*initiatorDocument->domWindow())->addResourceTiming(info);
 }
 
@@ skipping 444 matching lines @@
 }
 
 DEFINE_TRACE(FrameFetchContext)
 {
     visitor->trace(m_document);
     visitor->trace(m_documentLoader);
     FetchContext::trace(visitor);
 }
 
 } // namespace blink