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

third_party/WebKit/Source/core/dom/TreeScope.h

 /*
  * Copyright (C) 2011 Google Inc. All Rights Reserved.
  * Copyright (C) 2012 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.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 13 matching lines @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef TreeScope_h
 #define TreeScope_h
 
 #include "core/CoreExport.h"
 #include "core/dom/DocumentOrderedMap.h"
 #include "core/html/forms/RadioButtonGroupScope.h"
 #include "core/layout/HitTestRequest.h"
+#include "core/svg/SVGTreeScopeResources.h"
 #include "platform/heap/Handle.h"
 #include "wtf/text/AtomicString.h"
 
 namespace blink {
 
 class ContainerNode;
 class DOMSelection;
 class Document;
 class Element;
 class HTMLMapElement;
@@ skipping 64 matching lines @@
     TreeScope* commonAncestorTreeScope(TreeScope& other);
 
     Element* getElementByAccessKey(const String& key) const;
 
     DECLARE_VIRTUAL_TRACE();
 
     ScopedStyleResolver* scopedStyleResolver() const { return m_scopedStyleResolver.get(); }
     ScopedStyleResolver& ensureScopedStyleResolver();
     void clearScopedStyleResolver();
 
+    const SVGTreeScopeResources* svgExtensions();
+    SVGTreeScopeResources& accessSVGTreeScopedResources();
+
 protected:
     TreeScope(ContainerNode&, Document&);
     TreeScope(Document&);
     virtual ~TreeScope();
 
     void setDocument(Document& document) { m_document = &document; }
     void setParentTreeScope(TreeScope&);
     void setNeedsStyleRecalcForViewportUnits();
 
 private:
     Member<ContainerNode> m_rootNode;
     Member<Document> m_document;
     Member<TreeScope> m_parentTreeScope;
 
     Member<DocumentOrderedMap> m_elementsById;
     Member<DocumentOrderedMap> m_imageMapsByName;
 
     Member<IdTargetObserverRegistry> m_idTargetObserverRegistry;
 
     Member<ScopedStyleResolver> m_scopedStyleResolver;
 
     mutable Member<DOMSelection> m_selection;
 
     RadioButtonGroupScope m_radioButtonGroupScope;
+
+    Member<SVGTreeScopeResources> m_svgTreeScopedResources;
+
 };
 
 inline bool TreeScope::hasElementWithId(const AtomicString& id) const
 {
     DCHECK(!id.isNull());
     return m_elementsById && m_elementsById->contains(id);
 }
 
 inline bool TreeScope::containsMultipleElementsWithId(const AtomicString& id) const
 {
     return m_elementsById && m_elementsById->containsMultiple(id);
 }
 
 DEFINE_COMPARISON_OPERATORS_WITH_REFERENCES(TreeScope)
 
 HitTestResult hitTestInDocument(const Document*, int x, int y, const HitTestRequest& = HitTestRequest::ReadOnly | HitTestRequest::Active);
 
 } // namespace blink
 
 #endif // TreeScope_h