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

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

Index: third_party/WebKit/Source/core/svg/SVGMPathElement.cpp
diff --git a/third_party/WebKit/Source/core/svg/SVGMPathElement.cpp b/third_party/WebKit/Source/core/svg/SVGMPathElement.cpp
index e570f343fb42957082a33c714f0a03b24600ad9b..465b53eeb231bfabfa27698e3046c52aa368d382 100644
--- a/third_party/WebKit/Source/core/svg/SVGMPathElement.cpp
+++ b/third_party/WebKit/Source/core/svg/SVGMPathElement.cpp
@@ -55,11 +55,11 @@ void SVGMPathElement::buildPendingResource()
     Element* target = SVGURIReference::targetElementFromIRIString(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().accessSVGTreeScopedResources().isElementPendingResource(this, id))
             return;
 
         if (!id.isEmpty()) {
-            document().accessSVGExtensions().addPendingResource(id, this);
+            treeScope().accessSVGTreeScopedResources().addPendingResource(id, this);
             ASSERT(hasPendingResources());
         }
     } else if (isSVGPathElement(target)) {