SVG objects with same idrefs conflict when under different shadow root

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

Index: third_party/WebKit/Source/core/svg/SVGTextPathElement.cpp
diff --git a/third_party/WebKit/Source/core/svg/SVGTextPathElement.cpp b/third_party/WebKit/Source/core/svg/SVGTextPathElement.cpp
index eae5a2b6c12119c0f9d3fd5fad191734bc9cc3ef..c96236ea95041cdf6174d168dd67d981349aba4e 100644
--- a/third_party/WebKit/Source/core/svg/SVGTextPathElement.cpp
+++ b/third_party/WebKit/Source/core/svg/SVGTextPathElement.cpp
@@ -21,7 +21,7 @@
 #include "core/svg/SVGTextPathElement.h"
 
 #include "core/layout/svg/LayoutSVGTextPath.h"
-#include "core/svg/SVGDocumentExtensions.h"
+#include "core/svg/SVGTreeScopeResources.h"
 
 namespace blink {
 
@@ -127,12 +127,12 @@ void SVGTextPathElement::buildPendingResource() {
       hrefString(), treeScope(), &id);
   if (!target) {
     // Do not register as pending if we are already pending this resource.
-    if (document().accessSVGExtensions().isElementPendingResource(this, id))
+    if (treeScope().ensureSVGTreeScopedResources().isElementPendingResource(
+            this, id))
       return;
-
     if (!id.isEmpty()) {
-      document().accessSVGExtensions().addPendingResource(id, this);
-      ASSERT(hasPendingResources());
+      treeScope().ensureSVGTreeScopedResources().addPendingResource(id, this);
+      DCHECK(hasPendingResources());
     }
   } else if (isSVGPathElement(*target)) {
     // Register us with the target in the dependencies map. Any change of