WIP (Introduce WTF::NonNullPtr<T>.)

Source/core/css/SelectorChecker.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 2004-2005 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2006, 2007 Nicholas Shanks (webkit@nickshanks.com)
  * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
  * Copyright (C) 2007, 2008 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (c) 2011, Code Aurora Forum. All rights reserved.
  * Copyright (C) Research In Motion Limited 2011. All rights reserved.
@@ skipping 245 matching lines @@
         if ((context.elementStyle || m_mode == CollectingRules || m_mode == QueryingRules) && dynamicPseudo != NOPSEUDO
             && !nextContext.hasSelectionPseudo
             && !(nextContext.hasScrollbarPseudo && nextContext.selector->m_match == CSSSelector::PseudoClass))
             return SelectorFailsCompletely;
         nextContext.isSubSelector = true;
         return match(nextContext, dynamicPseudo, siblingTraversalStrategy);
 
     case CSSSelector::ShadowPseudo:
         {
             // If we're in the same tree-scope as the scoping element, then following a shadow descendant combinator would escape that and thus the scope.
-            if (context.scope && &context.scope->treeScope() == &context.element->treeScope() && (context.behaviorAtBoundary & BoundaryBehaviorMask) != StaysWithinTreeScope)
+            if (context.scope && context.scope->treeScope() == context.element->treeScope() && (context.behaviorAtBoundary & BoundaryBehaviorMask) != StaysWithinTreeScope)
                 return SelectorFailsCompletely;
             Element* shadowHostNode = context.element->shadowHost();
             if (!shadowHostNode)
                 return SelectorFailsCompletely;
             nextContext.element = shadowHostNode;
             nextContext.isSubSelector = false;
             nextContext.elementStyle = 0;
             return match(nextContext, ignoreDynamicPseudo, siblingTraversalStrategy);
         }
     }
@@ skipping 715 matching lines @@
     return element->focused() && isFrameFocused(element);
 }
 
 template
 SelectorChecker::Match SelectorChecker::match(const SelectorCheckingContext&, PseudoId&, const DOMSiblingTraversalStrategy&) const;
 
 template
 SelectorChecker::Match SelectorChecker::match(const SelectorCheckingContext&, PseudoId&, const ShadowDOMSiblingTraversalStrategy&) const;
 
 }