Make Document::nodeChildrenWillBeRemoved() take a reference

Source/core/dom/RangeBoundaryPoint.h

 /*
  * Copyright (C) 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 31 matching lines @@
     Node* container() const;
     int offset() const;
     Node* childBefore() const;
 
     void clear();
 
     void set(PassRefPtr<Node> container, int offset, Node* childBefore);
     void setOffset(int offset);
 
     void setToBeforeChild(Node&);
-    void setToStartOfNode(PassRefPtr<Node>);
-    void setToEndOfNode(PassRefPtr<Node>);
+    void setToStartOfNode(Node&);
+    void setToEndOfNode(Node&);
 
     void childBeforeWillBeRemoved();
     void invalidateOffset() const;
     void ensureOffsetIsValid() const;
 
 private:
     static const int invalidOffset = -1;
 
     RefPtr<Node> m_containerNode;
     mutable int m_offsetInContainer;
@@ skipping 73 matching lines @@
 }
 
 inline void RangeBoundaryPoint::setToBeforeChild(Node& child)
 {
     ASSERT(child.parentNode());
     m_childBeforeBoundary = child.previousSibling();
     m_containerNode = child.parentNode();
     m_offsetInContainer = m_childBeforeBoundary ? invalidOffset : 0;
 }
 
-inline void RangeBoundaryPoint::setToStartOfNode(PassRefPtr<Node> container)
+inline void RangeBoundaryPoint::setToStartOfNode(Node& container)
 {
-    ASSERT(container);
-    m_containerNode = container;
+    m_containerNode = PassRefPtr<Node>(container);
     m_offsetInContainer = 0;
     m_childBeforeBoundary = nullptr;
 }
 
-inline void RangeBoundaryPoint::setToEndOfNode(PassRefPtr<Node> container)
+inline void RangeBoundaryPoint::setToEndOfNode(Node& container)
 {
-    ASSERT(container);
-    m_containerNode = container;
+    m_containerNode = PassRefPtr<Node>(container);
     if (m_containerNode->offsetInCharacters()) {
         m_offsetInContainer = m_containerNode->maxCharacterOffset();
         m_childBeforeBoundary = nullptr;
     } else {
         m_childBeforeBoundary = m_containerNode->lastChild();
         m_offsetInContainer = m_childBeforeBoundary ? invalidOffset : 0;
     }
 }
 
 inline void RangeBoundaryPoint::childBeforeWillBeRemoved()
@@ skipping 21 matching lines @@
     } else {
         if (a.offset() != b.offset())
             return false;
     }
     return true;
 }
 
 }
 
 #endif