Have TreeScrope::adoptIfNeeded() take a reference instead of a pointer

Source/core/dom/Attr.cpp

Index: Source/core/dom/Attr.cpp
diff --git a/Source/core/dom/Attr.cpp b/Source/core/dom/Attr.cpp
index e962c77fbd67ca845f6753edadedefdd512d4d60..6b0e04e0c395e6a625b1b96bf0bfe1efce75bfcf 100644
--- a/Source/core/dom/Attr.cpp
+++ b/Source/core/dom/Attr.cpp
@@ -85,7 +85,7 @@ void Attr::createTextChild()
         // This does everything appendChild() would do in this situation (assuming m_ignoreChildrenChanged was set),
         // but much more efficiently.
         textNode->setParentOrShadowHostNode(this);
-        treeScope().adoptIfNeeded(textNode.get());
+        treeScope().adoptIfNeeded(*textNode);
         setFirstChild(textNode.get());
         setLastChild(textNode.get());
     }