Revert of Revert "Post loading tasks on the appropriate WebFrameScheduler's queue."

third_party/WebKit/Source/core/fetch/ResourceFetcher.cpp

 /*
     Copyright (C) 1998 Lars Knoll (knoll@mpi-hd.mpg.de)
     Copyright (C) 2001 Dirk Mueller (mueller@kde.org)
     Copyright (C) 2002 Waldo Bastian (bastian@kde.org)
     Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
     Copyright (C) 2009 Torch Mobile Inc. http://www.torchmobile.com/
 
     This library is free software; you can redistribute it and/or
     modify it under the terms of the GNU Library General Public
     License as published by the Free Software Foundation; either
@@ skipping 171 matching lines @@
 #endif
 }
 
 ResourceFetcher::~ResourceFetcher()
 {
 #if !ENABLE(OILPAN)
     clearPreloads();
 #endif
 }
 
+WebTaskRunner* ResourceFetcher::loadingTaskRunner()
+{
+    if (!m_context)
+        return nullptr;
+
+    return m_context->loadingTaskRunner();
+}
+
 Resource* ResourceFetcher::cachedResource(const KURL& resourceURL) const
 {
     KURL url = MemoryCache::removeFragmentIdentifierIfNeeded(resourceURL);
     return m_documentResources.get(url).get();
 }
 
 bool ResourceFetcher::canAccessResource(Resource* resource, SecurityOrigin* sourceOrigin, const KURL& url, AccessControlLoggingDecision logErrorsDecision) const
 {
     // Redirects can change the response URL different from one of request.
     bool forPreload = resource->isUnusedPreload();
@@ skipping 957 matching lines @@
     visitor->trace(m_archiveResourceCollection);
     visitor->trace(m_loaders);
     visitor->trace(m_nonBlockingLoaders);
 #if ENABLE(OILPAN)
     visitor->trace(m_preloads);
     visitor->trace(m_resourceTimingInfoMap);
 #endif
 }
 
 }