Remove parent() concept from ScopedStyleResolver.

sky/engine/core/css/resolver/ScopedStyleResolver.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 38 matching lines @@
     Node* ownerNode = sheet->ownerNode();
     if (!isHTMLStyleElement(ownerNode))
         return &document;
 
     HTMLStyleElement& styleElement = toHTMLStyleElement(*ownerNode);
     if (styleElement.isInShadowTree())
         return styleElement.containingShadowRoot();
     return &document;
 }
 
-ScopedStyleResolver* ScopedStyleResolver::parent() const
-{
-    for (TreeScope* scope = treeScope().parentTreeScope(); scope; scope = scope->parentTreeScope()) {
-        if (ScopedStyleResolver* resolver = scope->scopedStyleResolver())
-            return resolver;
-    }
-    return 0;
-}
-
 void ScopedStyleResolver::addRulesFromSheet(CSSStyleSheet* cssSheet, const MediaQueryEvaluator& medium, StyleResolver* resolver)
 {
     m_authorStyleSheets.append(cssSheet);
     unsigned index = m_authorStyleSheets.size() - 1;
     StyleSheetContents* sheet = cssSheet->contents();
 
     AddRuleFlags addRuleFlags = RuleHasNoSpecialState;
     const RuleSet& ruleSet = sheet->ensureRuleSet(medium, addRuleFlags);
     resolver->addMediaQueryResults(ruleSet.viewportDependentMediaQueryResults());
     resolver->processScopedRules(ruleSet, cssSheet, index, treeScope().rootNode());
@@ skipping 48 matching lines @@
         contextFlags |= SelectorChecker::ScopeContainsLastMatchedElement;
 
     RuleRange ruleRange = collector.matchedResult().ranges.authorRuleRange();
     for (size_t i = 0; i < m_authorStyleSheets.size(); ++i) {
         MatchRequest matchRequest(&m_authorStyleSheets[i]->contents()->ruleSet(), includeEmptyRules, &m_scope->rootNode(), m_authorStyleSheets[i], applyAuthorStyles, i);
         collector.collectMatchingRules(matchRequest, ruleRange, static_cast<SelectorChecker::ContextFlags>(contextFlags), cascadeScope, cascadeOrder);
     }
 }
 
 } // namespace blink