Collect content:attr(...)-features in RuleFeatureSet.

Source/core/css/resolver/StyleResolver.cpp

Index: Source/core/css/resolver/StyleResolver.cpp
diff --git a/Source/core/css/resolver/StyleResolver.cpp b/Source/core/css/resolver/StyleResolver.cpp
index 2125d545b93fdfa362c9a7f4408efce3cfb87e42..b14c8fd0fedf7b139d4d3c4293e4cbe0399613d0 100644
--- a/Source/core/css/resolver/StyleResolver.cpp
+++ b/Source/core/css/resolver/StyleResolver.cpp
@@ -517,12 +517,6 @@ PassRefPtr<RenderStyle> StyleResolver::styleForDocument(Document& document)
     return documentStyle.release();
 }
 
-static void addContentAttrValuesToFeatures(const Vector<AtomicString>& contentAttrValues, RuleFeatureSet& features)
-{
-    for (size_t i = 0; i < contentAttrValues.size(); ++i)
-        features.addContentAttr(contentAttrValues[i]);
-}
-
 void StyleResolver::adjustRenderStyle(StyleResolverState& state, Element* element)
 {
     StyleAdjuster adjuster(document().inQuirksMode());
@@ -630,8 +624,6 @@ PassRefPtr<RenderStyle> StyleResolver::styleForElement(Element* element, RenderS
         applyMatchedProperties(state, collector.matchedResult());
         applyCallbackSelectors(state);
 
-        addContentAttrValuesToFeatures(state.contentAttrValues(), m_features);
-
         // Cache our original display.
         state.style()->setOriginalDisplay(state.style()->display());
 
@@ -813,8 +805,6 @@ bool StyleResolver::pseudoStyleForElementInternal(Element& element, const Pseudo
         applyMatchedProperties(state, collector.matchedResult());
         applyCallbackSelectors(state);
 
-        addContentAttrValuesToFeatures(state.contentAttrValues(), m_features);
-
         // Cache our original display.
         state.style()->setOriginalDisplay(state.style()->display());
 
@@ -888,8 +878,6 @@ PassRefPtr<RenderStyle> StyleResolver::styleForPage(int pageIndex)
 
     applyMatchedProperties<LowPriorityProperties>(state, result, false, 0, result.matchedProperties.size() - 1, inheritedOnly);
 
-    addContentAttrValuesToFeatures(state.contentAttrValues(), m_features);
-
     loadPendingResources(state);
 
     didAccess();