Get rid of TreeBoundaryCrossingRules.

Source/core/css/resolver/ScopedStyleResolver.h

Index: Source/core/css/resolver/ScopedStyleResolver.h
diff --git a/Source/core/css/resolver/ScopedStyleResolver.h b/Source/core/css/resolver/ScopedStyleResolver.h
index a8c91cd62e658ae79f075210b60f1609fbb28979..3c7016dc8730a6cb0198d4c5c5f0f17823bedcf8 100644
--- a/Source/core/css/resolver/ScopedStyleResolver.h
+++ b/Source/core/css/resolver/ScopedStyleResolver.h
@@ -42,10 +42,12 @@ class StyleSheetContents;
 class ViewportStyleResolver;
 
 // This class selects a ComputedStyle for a given element based on a collection of stylesheets.
-class ScopedStyleResolver final : public NoBaseWillBeGarbageCollected<ScopedStyleResolver> {
+class ScopedStyleResolver final : public NoBaseWillBeGarbageCollectedFinalized<ScopedStyleResolver> {
     WTF_MAKE_NONCOPYABLE(ScopedStyleResolver);
     WTF_MAKE_FAST_ALLOCATED_WILL_BE_REMOVED(ScopedStyleResolver);
 public:
+    ~ScopedStyleResolver();
+
     static PassOwnPtrWillBeRawPtr<ScopedStyleResolver> create(TreeScope& scope)
     {
         return adoptPtrWillBeNoop(new ScopedStyleResolver(scope));
@@ -67,6 +69,8 @@ public:
     void resetAuthorStyle();
     void collectViewportRulesTo(ViewportStyleResolver*) const;
 
+    bool hasTreeBoundaryCrossingRules() const { return m_treeBoundaryCrossingRuleSet; }
+
     DECLARE_TRACE();
 
 private: