SVG objects with same idrefs conflict when under different shadow root

third_party/WebKit/Source/core/svg/SVGUseElement.cpp

 /*
  * Copyright (C) 2004, 2005, 2006, 2007, 2008 Nikolas Zimmermann
  * <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007 Rob Buis <buis@kde.org>
  * Copyright (C) Research In Motion Limited 2009-2010. All rights reserved.
  * Copyright (C) 2011 Torch Mobile (Beijing) Co. Ltd. All rights reserved.
  * Copyright (C) 2012 University of Szeged
  * Copyright (C) 2012 Renata Hodovan <reni@webkit.org>
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 20 matching lines @@
 #include "core/dom/Document.h"
 #include "core/dom/ElementTraversal.h"
 #include "core/dom/StyleChangeReason.h"
 #include "core/dom/TaskRunnerHelper.h"
 #include "core/dom/shadow/ElementShadow.h"
 #include "core/dom/shadow/ShadowRoot.h"
 #include "core/events/Event.h"
 #include "core/fetch/FetchRequest.h"
 #include "core/fetch/ResourceFetcher.h"
 #include "core/layout/svg/LayoutSVGTransformableContainer.h"
-#include "core/svg/SVGDocumentExtensions.h"
 #include "core/svg/SVGGElement.h"
 #include "core/svg/SVGLengthContext.h"
 #include "core/svg/SVGSVGElement.h"
 #include "core/svg/SVGSymbolElement.h"
+#include "core/svg/SVGTreeScopeResources.h"
 #include "core/xml/parser/XMLDocumentParser.h"
 #include "wtf/Vector.h"
 
 namespace blink {
 
 inline SVGUseElement::SVGUseElement(Document& document)
     : SVGGraphicsElement(SVGNames::useTag, document),
       SVGURIReference(this),
       m_x(SVGAnimatedLength::create(this,
                                     SVGNames::xAttr,
@@ skipping 253 matching lines @@
   else if (resourceIsValid())
     lookupScope = m_resource->document();
   else
     return nullptr;
   Element* target = lookupScope->getElementById(m_elementIdentifier);
   // TODO(fs): Why would the Element not be "connected" at this point?
   if (target && target->isConnected())
     return target;
   // Don't record any pending references for external resources.
   if (!m_resource) {
-    document().accessSVGExtensions().addPendingResource(m_elementIdentifier,
-                                                        this);
+    treeScope().ensureSVGTreeScopedResources().addPendingResource(
+        m_elementIdentifier, this);
     DCHECK(hasPendingResources());
   }
   return nullptr;
 }
 
 void SVGUseElement::buildPendingResource() {
   if (inUseShadowTree())
     return;
   clearShadowTree();
   cancelShadowTreeRecreation();
@@ skipping 393 matching lines @@
 
   if (m_resource)
     m_resource->removeClient(this);
 
   m_resource = resource;
   if (m_resource)
     m_resource->addClient(this);
 }
 
 }  // namespace blink