Make Document::nodeChildrenWillBeRemoved() take a reference

Source/core/dom/Document.cpp

Index: Source/core/dom/Document.cpp
diff --git a/Source/core/dom/Document.cpp b/Source/core/dom/Document.cpp
index 20777d982c6888951e29e87cd19ac26dbf2691c6..62689136a550d721db3cf6049738707a39b4898b 100644
--- a/Source/core/dom/Document.cpp
+++ b/Source/core/dom/Document.cpp
@@ -3597,7 +3597,7 @@ void Document::updateRangesAfterChildrenChanged(ContainerNode* container)
     }
 }
 
-void Document::nodeChildrenWillBeRemoved(ContainerNode* container)
+void Document::nodeChildrenWillBeRemoved(ContainerNode& container)
 {
     NoEventDispatchAssertion assertNoEventDispatch;
     if (!m_ranges.isEmpty()) {
@@ -3608,12 +3608,12 @@ void Document::nodeChildrenWillBeRemoved(ContainerNode* container)
 
     HashSet<NodeIterator*>::const_iterator nodeIteratorsEnd = m_nodeIterators.end();
     for (HashSet<NodeIterator*>::const_iterator it = m_nodeIterators.begin(); it != nodeIteratorsEnd; ++it) {
-        for (Node* n = container->firstChild(); n; n = n->nextSibling())
+        for (Node* n = container.firstChild(); n; n = n->nextSibling())
             (*it)->nodeWillBeRemoved(*n);
     }
 
     if (Frame* frame = this->frame()) {
-        for (Node* n = container->firstChild(); n; n = n->nextSibling()) {
+        for (Node* n = container.firstChild(); n; n = n->nextSibling()) {
             frame->eventHandler().nodeWillBeRemoved(*n);
             frame->selection().nodeWillBeRemoved(*n);
             frame->page()->dragCaretController().nodeWillBeRemoved(*n);