Have getChildNodes() take a ContainerNode in argument

Source/core/editing/RemoveNodePreservingChildrenCommand.cpp

 /*
  * Copyright (C) 2005, 2008 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 23 matching lines @@
 RemoveNodePreservingChildrenCommand::RemoveNodePreservingChildrenCommand(PassRefPtrWillBeRawPtr<Node> node, ShouldAssumeContentIsAlwaysEditable shouldAssumeContentIsAlwaysEditable)
     : CompositeEditCommand(node->document())
     , m_node(node)
     , m_shouldAssumeContentIsAlwaysEditable(shouldAssumeContentIsAlwaysEditable)
 {
     ASSERT(m_node);
 }
 
 void RemoveNodePreservingChildrenCommand::doApply()
 {
-    WillBeHeapVector<RefPtrWillBeMember<Node> > children;
-    for (Node* child = m_node->firstChild(); child; child = child->nextSibling())
-        children.append(child);
+    if (m_node->isContainerNode()) {
+        NodeVector children;
+        getChildNodes(toContainerNode(*m_node), children);
 
-    size_t size = children.size();
-    for (size_t i = 0; i < size; ++i) {
-        RefPtrWillBeRawPtr<Node> child = children[i].release();
-        removeNode(child, m_shouldAssumeContentIsAlwaysEditable);
-        insertNodeBefore(child.release(), m_node, m_shouldAssumeContentIsAlwaysEditable);
+        size_t size = children.size();
+        for (size_t i = 0; i < size; ++i) {
+            RefPtrWillBeRawPtr<Node> child = children[i].release();
+            removeNode(child, m_shouldAssumeContentIsAlwaysEditable);
+            insertNodeBefore(child.release(), m_node, m_shouldAssumeContentIsAlwaysEditable);
+        }
     }
     removeNode(m_node, m_shouldAssumeContentIsAlwaysEditable);
 }
 
 void RemoveNodePreservingChildrenCommand::trace(Visitor* visitor)
 {
     visitor->trace(m_node);
     CompositeEditCommand::trace(visitor);
 }
 
 }