Remove unnecessary feature flag update.

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

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2008, 2009, 2011, 2012 Google Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) Research In Motion Limited 2010-2011. All rights reserved.
@@ skipping 118 matching lines @@
 }
 
 const WillBeHeapVector<RefPtrWillBeMember<StyleSheet>>& StyleEngine::styleSheetsForStyleSheetList(TreeScope& treeScope)
 {
     if (treeScope == m_document)
         return documentStyleSheetCollection()->styleSheetsForStyleSheetList();
 
     return ensureStyleSheetCollectionFor(treeScope)->styleSheetsForStyleSheetList();
 }
 
-void StyleEngine::combineCSSFeatureFlags(const RuleFeatureSet& features)
-{
-    // Delay resetting the flags until after next style recalc since unapplying the style may not work without these set (this is true at least with before/after).
-    m_usesSiblingRules = m_usesSiblingRules || features.usesSiblingRules();
-    m_usesFirstLineRules = m_usesFirstLineRules || features.usesFirstLineRules();
-    m_usesWindowInactiveSelector = m_usesWindowInactiveSelector || features.usesWindowInactiveSelector();
-    m_maxDirectAdjacentSelectors = max(m_maxDirectAdjacentSelectors, features.maxDirectAdjacentSelectors());
-}
-
 void StyleEngine::resetCSSFeatureFlags(const RuleFeatureSet& features)
 {
     m_usesSiblingRules = features.usesSiblingRules();
     m_usesFirstLineRules = features.usesFirstLineRules();
     m_usesWindowInactiveSelector = features.usesWindowInactiveSelector();
     m_maxDirectAdjacentSelectors = features.maxDirectAdjacentSelectors();
 }
 
 void StyleEngine::injectAuthorSheet(PassRefPtrWillBeRawPtr<StyleSheetContents> authorSheet)
 {
@@ skipping 227 matching lines @@
     // which is not in a frame. Code which hits this should have checked
     // Document::isActive() before calling into code which could get here.
 
     ASSERT(document().frame());
 
     m_resolver = StyleResolver::create(*m_document);
 
     // A scoped style resolver for document will be created during
     // appendActiveAuthorStyleSheets if needed.
     appendActiveAuthorStyleSheets();
-    combineCSSFeatureFlags(m_resolver->ensureUpdatedRuleFeatureSet());
 }
 
 void StyleEngine::clearResolver()
 {
     ASSERT(!document().inStyleRecalc());
     ASSERT(isMaster() || !m_resolver);
 
     document().clearScopedStyleResolver();
     // StyleEngine::shadowRootRemovedFromDocument removes not-in-document
     // treescopes from activeTreeScopes. StyleEngine::didRemoveShadowRoot
@@ skipping 329 matching lines @@
     visitor->trace(m_dirtyTreeScopes);
     visitor->trace(m_activeTreeScopes);
     visitor->trace(m_fontSelector);
     visitor->trace(m_textToSheetCache);
     visitor->trace(m_sheetToTextCache);
 #endif
     CSSFontSelectorClient::trace(visitor);
 }
 
 } // namespace blink