Make DocumentOrderedMap take a const reference for scope

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

Index: third_party/WebKit/Source/core/dom/DocumentOrderedMap.h
diff --git a/third_party/WebKit/Source/core/dom/DocumentOrderedMap.h b/third_party/WebKit/Source/core/dom/DocumentOrderedMap.h
index 53a4e4c9c2ebb47a456732f7edc3fa03596f7845..ca8d1ebf27bf65aa5fd745c776e7c21efa6dd4c3 100644
--- a/third_party/WebKit/Source/core/dom/DocumentOrderedMap.h
+++ b/third_party/WebKit/Source/core/dom/DocumentOrderedMap.h
@@ -56,11 +56,11 @@ class DocumentOrderedMap : public GarbageCollected<DocumentOrderedMap> {
   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();
 
@@ -91,7 +91,7 @@ class DocumentOrderedMap : public GarbageCollected<DocumentOrderedMap> {
   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: