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

third_party/WebKit/Source/core/layout/svg/LayoutSVGResourceContainer.h

 /*
  * Copyright (C) Research In Motion Limited 2010. All rights reserved.
  *
  * 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
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 96 matching lines @@
 
     HashSet<LayoutObject*> m_clients;
     PersistentHeapHashSet<WeakMember<SVGResourceClient>> m_resourceClients;
 };
 
 inline LayoutSVGResourceContainer* getLayoutSVGResourceContainerById(TreeScope& treeScope, const AtomicString& id)
 {
     if (id.isEmpty())
         return nullptr;
 
-    if (LayoutSVGResourceContainer* layoutResource = treeScope.document().accessSVGExtensions().resourceById(id))
+    if (LayoutSVGResourceContainer* layoutResource = treeScope.accessSVGTreeScopedResources().resourceById(id))
         return layoutResource;
 
     return nullptr;
 }
 
 template<typename Layout>
 Layout* getLayoutSVGResourceById(TreeScope& treeScope, const AtomicString& id)
 {
     if (LayoutSVGResourceContainer* container = getLayoutSVGResourceContainerById(treeScope, id)) {
         if (container->resourceType() == Layout::s_resourceType)
             return static_cast<Layout*>(container);
     }
     return nullptr;
 }
 
 DEFINE_LAYOUT_OBJECT_TYPE_CASTS(LayoutSVGResourceContainer, isSVGResourceContainer());
 
 #define DEFINE_LAYOUT_SVG_RESOURCE_TYPE_CASTS(thisType, typeName) \
     DEFINE_TYPE_CASTS(thisType, LayoutSVGResourceContainer, resource, resource->resourceType() == typeName, resource.resourceType() == typeName)
 
 } // namespace blink
 
 #endif