Allow resource loads inside page unload events

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 537 matching lines @@
 
     return true;
 }
 
 bool ResourceFetcher::shouldLoadNewResource() const
 {
     if (!frame())
         return false;
     if (!m_documentLoader)
         return true;
-    return m_documentLoader == frame()->loader().activeDocumentLoader();
+    if (m_documentLoader == frame()->loader().activeDocumentLoader())
+        return true;
+    return document() && document()->pageDismissalEventBeingDispatched() != Document::NoDismissal;
 }
 
 bool ResourceFetcher::resourceNeedsLoad(Resource* resource, const FetchRequest& request, RevalidationPolicy policy)
 {
     if (FetchRequest::DeferredByClient == request.defer())
         return false;
     if (policy != Use)
         return true;
     if (resource->stillNeedsLoad())
         return true;
@@ skipping 751 matching lines @@
 }
 #endif
 
 const ResourceLoaderOptions& ResourceFetcher::defaultResourceOptions()
 {
     DEFINE_STATIC_LOCAL(ResourceLoaderOptions, options, (SendCallbacks, SniffContent, BufferData, AllowStoredCredentials, ClientRequestedCredentials, AskClientForCrossOriginCredentials, DoSecurityCheck, CheckContentSecurityPolicy, DocumentContext));
     return options;
 }
 
 }