Have LiveNodeListBase::ownerNode() return a reference

Source/bindings/v8/custom/V8HTMLAllCollectionCustom.cpp

Index: Source/bindings/v8/custom/V8HTMLAllCollectionCustom.cpp
diff --git a/Source/bindings/v8/custom/V8HTMLAllCollectionCustom.cpp b/Source/bindings/v8/custom/V8HTMLAllCollectionCustom.cpp
index 759ada1974e44e52a7f14b8e81272668c89f9b62..9d73a3f573b48f0a8a54c61b68bbb88c856e81fb 100644
--- a/Source/bindings/v8/custom/V8HTMLAllCollectionCustom.cpp
+++ b/Source/bindings/v8/custom/V8HTMLAllCollectionCustom.cpp
@@ -87,10 +87,9 @@ void V8HTMLAllCollection::legacyCallCustom(const v8::FunctionCallbackInfo<v8::Va
         return;
 
     HTMLAllCollection* imp = V8HTMLAllCollection::toNative(info.Holder());
-    Node* ownerNode = imp->ownerNode();
-    ASSERT(ownerNode);
+    Node& ownerNode = imp->ownerNode();
 
-    UseCounter::count(ownerNode->document(), UseCounter::DocumentAllLegacyCall);
+    UseCounter::count(ownerNode.document(), UseCounter::DocumentAllLegacyCall);
 
     if (info.Length() == 1) {
         v8SetReturnValue(info, getItem(imp, info[0], info));