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

Source/core/css/SelectorChecker.cpp

Index: Source/core/css/SelectorChecker.cpp
diff --git a/Source/core/css/SelectorChecker.cpp b/Source/core/css/SelectorChecker.cpp
index d6d28b8b1652a827056651b25262e28d8018a1bd..2c00bf76a04b3f20c12831e48353f83e3d97b7c2 100644
--- a/Source/core/css/SelectorChecker.cpp
+++ b/Source/core/css/SelectorChecker.cpp
@@ -263,7 +263,7 @@ SelectorChecker::Match SelectorChecker::match(const SelectorCheckingContext& con
     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)