Remove unnecessary feature flag update.

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

Index: third_party/WebKit/Source/core/dom/StyleEngine.cpp
diff --git a/third_party/WebKit/Source/core/dom/StyleEngine.cpp b/third_party/WebKit/Source/core/dom/StyleEngine.cpp
index 11b0c7645a06a96d0478b57a1b440500e9764f5c..0dcf395c72b951f6c19d634aac05bdc95888fb2e 100644
--- a/third_party/WebKit/Source/core/dom/StyleEngine.cpp
+++ b/third_party/WebKit/Source/core/dom/StyleEngine.cpp
@@ -136,15 +136,6 @@ const WillBeHeapVector<RefPtrWillBeMember<StyleSheet>>& StyleEngine::styleSheets
     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();
@@ -392,7 +383,6 @@ void StyleEngine::createResolver()
     // A scoped style resolver for document will be created during
     // appendActiveAuthorStyleSheets if needed.
     appendActiveAuthorStyleSheets();
-    combineCSSFeatureFlags(m_resolver->ensureUpdatedRuleFeatureSet());
 }
 
 void StyleEngine::clearResolver()