SVG object with same idrefs get conflicted even they are under different shadow root

third_party/WebKit/Source/core/layout/svg/ReferenceFilterBuilder.cpp

 /*
  * Copyright (C) 2013 Adobe Systems Inc. All rights reserved.
  * Copyright (C) 2013 Google Inc.  All rights reserved.
  * Copyright (C) 2011 Apple 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
@@ skipping 59 matching lines @@
     }
 
     if (!treeScope)
         return nullptr;
 
     Element* filter = treeScope->getElementById(filterOperation.fragment());
 
     if (!filter) {
         // Although we did not find the referenced filter, it might exist later
         // in the document.
-        treeScope->document().accessSVGExtensions().addPendingResource(filterOperation.fragment(), &element);
+        treeScope->accessSVGTreeScopedResources().addPendingResource(filterOperation.fragment(), &element);
         return nullptr;
     }
 
     if (!isSVGFilterElement(*filter))
         return nullptr;
 
     return toSVGFilterElement(filter);
 }
 
 } // namespace blink