Use hasRareData() rather than null-checking elementRareData().

third_party/WebKit/Source/core/dom/Element.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Peter Kelly (pmk@post.com)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2007 David Smith (catfish.man@gmail.com)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2012, 2013 Apple Inc. All rights reserved.
  *           (C) 2007 Eric Seidel (eric@webkit.org)
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 2595 matching lines @@
         }
         return nullptr;
     }
 
     exceptionState.throwDOMException(SyntaxError, "The value provided ('" + where + "') is not one of 'beforeBegin', 'afterBegin', 'beforeEnd', or 'afterEnd'.");
     return nullptr;
 }
 
 NodeIntersectionObserverData* Element::intersectionObserverData() const
 {
-    if (elementRareData())
+    if (hasRareData())
         return elementRareData()->intersectionObserverData();
     return nullptr;
 }
 
 NodeIntersectionObserverData& Element::ensureIntersectionObserverData()
 {
     return ensureElementRareData().ensureIntersectionObserverData();
 }
 
 // Step 1 of http://domparsing.spec.whatwg.org/#insertadjacenthtml()
@@ skipping 1080 matching lines @@
 
 DEFINE_TRACE_WRAPPERS(Element)
 {
     if (hasRareData()) {
         visitor->traceWrappers(elementRareData());
     }
     ContainerNode::traceWrappers(visitor);
 }
 
 } // namespace blink