Have ContainerNodeAlgorithms deal with references instead of pointers

Source/core/html/parser/HTMLConstructionSite.cpp

Index: Source/core/html/parser/HTMLConstructionSite.cpp
diff --git a/Source/core/html/parser/HTMLConstructionSite.cpp b/Source/core/html/parser/HTMLConstructionSite.cpp
index 4db3db9d6ec75a57ba6889556911c551cce62e0e..46c6faf616dc18a9a3e56b880b6d67781aadd675 100644
--- a/Source/core/html/parser/HTMLConstructionSite.cpp
+++ b/Source/core/html/parser/HTMLConstructionSite.cpp
@@ -99,7 +99,7 @@ static inline void insert(HTMLConstructionSiteTask& task)
         task.parent = toHTMLTemplateElement(task.parent.get())->content();
 
     if (ContainerNode* parent = task.child->parentNode())
-        parent->parserRemoveChild(task.child.get());
+        parent->parserRemoveChild(*task.child);
 
     if (task.nextChild)
         task.parent->parserInsertBefore(task.child.get(), task.nextChild.get());
@@ -124,7 +124,7 @@ static inline void executeReparentTask(HTMLConstructionSiteTask& task)
     ASSERT(task.operation == HTMLConstructionSiteTask::Reparent);
 
     if (ContainerNode* parent = task.child->parentNode())
-        parent->parserRemoveChild(task.child.get());
+        parent->parserRemoveChild(*task.child);
 
     task.parent->parserAppendChild(task.child);
 }