Have Node::ensureRareData() return 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 a8c4b570081df7616853c961040b1b1b14286b59..49ca221f528ac5a651a756956fe0c16d6b8df578 100644
--- a/Source/core/dom/Document.cpp
+++ b/Source/core/dom/Document.cpp
@@ -4227,7 +4227,7 @@ bool Document::hasSVGRootNode() const
 
 PassRefPtr<HTMLCollection> Document::ensureCachedCollection(CollectionType type)
 {
-    return ensureRareData()->ensureNodeLists()->addCacheWithAtomicName<HTMLCollection>(this, type);
+    return ensureRareData().ensureNodeLists()->addCacheWithAtomicName<HTMLCollection>(this, type);
 }
 
 PassRefPtr<HTMLCollection> Document::images()
@@ -4279,17 +4279,17 @@ PassRefPtr<HTMLCollection> Document::allForBinding()
 
 PassRefPtr<HTMLCollection> Document::all()
 {
-    return ensureRareData()->ensureNodeLists()->addCacheWithAtomicName<HTMLAllCollection>(this, DocAll);
+    return ensureRareData().ensureNodeLists()->addCacheWithAtomicName<HTMLAllCollection>(this, DocAll);
 }
 
 PassRefPtr<HTMLCollection> Document::windowNamedItems(const AtomicString& name)
 {
-    return ensureRareData()->ensureNodeLists()->addCacheWithAtomicName<HTMLNameCollection>(this, WindowNamedItems, name);
+    return ensureRareData().ensureNodeLists()->addCacheWithAtomicName<HTMLNameCollection>(this, WindowNamedItems, name);
 }
 
 PassRefPtr<HTMLCollection> Document::documentNamedItems(const AtomicString& name)
 {
-    return ensureRareData()->ensureNodeLists()->addCacheWithAtomicName<HTMLNameCollection>(this, DocumentNamedItems, name);
+    return ensureRareData().ensureNodeLists()->addCacheWithAtomicName<HTMLNameCollection>(this, DocumentNamedItems, name);
 }
 
 void Document::finishedParsing()