Make DocumentOrderedMap take a const reference for scope

third_party/WebKit/Source/core/dom/DocumentOrderedMap.h

 /*
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 38 matching lines @@
 class DocumentOrderedMap : public GarbageCollected<DocumentOrderedMap> {
  public:
   static DocumentOrderedMap* Create();
 
   void Add(const AtomicString&, Element*);
   void Remove(const AtomicString&, Element*);
 
   bool Contains(const AtomicString&) const;
   bool ContainsMultiple(const AtomicString&) const;
   // concrete instantiations of the get<>() method template
-  Element* GetElementById(const AtomicString&, const TreeScope*) const;
+  Element* GetElementById(const AtomicString&, const TreeScope&) const;
   const HeapVector<Member<Element>>& GetAllElementsById(const AtomicString&,
-                                                        const TreeScope*) const;
-  Element* GetElementByMapName(const AtomicString&, const TreeScope*) const;
-  HTMLSlotElement* GetSlotByName(const AtomicString&, const TreeScope*) const;
+                                                        const TreeScope&) const;
+  Element* GetElementByMapName(const AtomicString&, const TreeScope&) const;
+  HTMLSlotElement* GetSlotByName(const AtomicString&, const TreeScope&) const;
 
   DECLARE_TRACE();
 
 #if DCHECK_IS_ON()
   // While removing a ContainerNode, ID lookups won't be precise should the tree
   // have elements with duplicate IDs contained in the element being removed.
   // Rare trees, but ID lookups may legitimately fail across such removals;
   // this scope object informs DocumentOrderedMaps about the transitory
   // state of the underlying tree.
   class RemoveScope {
@@ skipping 10 matching lines @@
    public:
     RemoveScope() {}
     ~RemoveScope() {}
   };
 #endif
 
  private:
   DocumentOrderedMap();
 
   template <bool keyMatches(const AtomicString&, const Element&)>
-  Element* Get(const AtomicString&, const TreeScope*) const;
+  Element* Get(const AtomicString&, const TreeScope&) const;
 
   class MapEntry : public GarbageCollected<MapEntry> {
    public:
     explicit MapEntry(Element* first_element)
         : element(first_element), count(1) {}
 
     DECLARE_TRACE();
 
     Member<Element> element;
     unsigned count;
@@ skipping 10 matching lines @@
 }
 
 inline bool DocumentOrderedMap::ContainsMultiple(const AtomicString& id) const {
   Map::const_iterator it = map_.find(id);
   return it != map_.end() && it->value->count > 1;
 }
 
 }  // namespace blink
 
 #endif  // DocumentOrderedMap_h