Use more references in ContainerNode code

Source/core/html/parser/HTMLConstructionSite.cpp

 /*
  * Copyright (C) 2010 Google, Inc. All Rights Reserved.
  * Copyright (C) 2011 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 84 matching lines @@
 
 static inline void insert(HTMLConstructionSiteTask& task)
 {
     if (task.parent->hasTagName(templateTag))
         task.parent = toHTMLTemplateElement(task.parent.get())->content();
 
     if (ContainerNode* parent = task.child->parentNode())
         parent->parserRemoveChild(*task.child);
 
     if (task.nextChild)
-        task.parent->parserInsertBefore(task.child.get(), task.nextChild.get());
+        task.parent->parserInsertBefore(task.child.get(), *task.nextChild);
     else
         task.parent->parserAppendChild(task.child.get());
 }
 
 static inline void executeInsertTask(HTMLConstructionSiteTask& task)
 {
     ASSERT(task.operation == HTMLConstructionSiteTask::Insert);
 
     insert(task);
 
@@ skipping 17 matching lines @@
 {
     ASSERT(task.operation == HTMLConstructionSiteTask::InsertAlreadyParsedChild);
 
     insert(task);
 }
 
 static inline void executeTakeAllChildrenTask(HTMLConstructionSiteTask& task)
 {
     ASSERT(task.operation == HTMLConstructionSiteTask::TakeAllChildren);
 
-    task.parent->parserTakeAllChildrenFrom(task.oldParent());
+    task.parent->parserTakeAllChildrenFrom(*task.oldParent());
 }
 
 void HTMLConstructionSite::executeTask(HTMLConstructionSiteTask& task)
 {
     ASSERT(m_taskQueue.isEmpty());
     if (task.operation == HTMLConstructionSiteTask::Insert)
         return executeInsertTask(task);
 
     // All the cases below this point are only used by the adoption agency.
 
@@ skipping 664 matching lines @@
 void HTMLConstructionSite::fosterParent(PassRefPtr<Node> node)
 {
     HTMLConstructionSiteTask task(HTMLConstructionSiteTask::Insert);
     findFosterSite(task);
     task.child = node;
     ASSERT(task.parent);
     queueTask(task);
 }
 
 }