Allow resource loads inside page unload events

Source/core/fetch/ResourceFetcher.cpp

Index: Source/core/fetch/ResourceFetcher.cpp
diff --git a/Source/core/fetch/ResourceFetcher.cpp b/Source/core/fetch/ResourceFetcher.cpp
index 4cb4aa5b3785eaf2b2fc695d92e79c2881f20c7d..fc8247657c6c6fc211634fef9ca435f221a6f5a8 100644
--- a/Source/core/fetch/ResourceFetcher.cpp
+++ b/Source/core/fetch/ResourceFetcher.cpp
@@ -555,7 +555,9 @@ bool ResourceFetcher::shouldLoadNewResource() const
         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)