Current work-in-progress crbug.com/567021

third_party/WebKit/Source/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
@@ skipping 65 matching lines @@
       ruleSet.fontFaceRules();
   for (auto& fontFaceRule : fontFaceRules) {
     if (FontFace* fontFace = FontFace::create(&document, fontFaceRule))
       cssFontSelector->fontFaceCache()->add(cssFontSelector, fontFaceRule,
                                             fontFace);
   }
   if (fontFaceRules.size() && document.styleResolver())
     document.styleResolver()->invalidateMatchedPropertiesCache();
 }
 
-void ScopedStyleResolver::appendCSSStyleSheet(CSSStyleSheet& cssSheet) {
-  RuleSet* ruleSet =
-      treeScope().document().styleEngine().ruleSetForSheet(cssSheet);
-
-  m_viewportDependentMediaQueryResults.appendVector(
-      cssSheet.viewportDependentMediaQueryResults());
-  m_deviceDependentMediaQueryResults.appendVector(
-      cssSheet.deviceDependentMediaQueryResults());
-  if (!ruleSet)
-    return;
-
-  unsigned index = m_authorStyleSheets.size();
-  m_authorStyleSheets.append(&cssSheet);
-  addKeyframeRules(*ruleSet);
-  addFontFaceRules(*ruleSet);
-  addTreeBoundaryCrossingRules(*ruleSet, &cssSheet, index);
-}
-
 void ScopedStyleResolver::appendActiveStyleSheets(
     unsigned index,
     const ActiveStyleSheetVector& activeSheets) {
   for (auto activeIterator = activeSheets.begin() + index;
        activeIterator != activeSheets.end(); activeIterator++) {
     CSSStyleSheet* sheet = activeIterator->first;
     m_viewportDependentMediaQueryResults.appendVector(
         sheet->viewportDependentMediaQueryResults());
     m_deviceDependentMediaQueryResults.appendVector(
         sheet->deviceDependentMediaQueryResults());
@@ skipping 201 matching lines @@
   m_treeBoundaryCrossingRuleSet->append(
       RuleSubSet::create(parentStyleSheet, sheetIndex, ruleSetForScope));
 }
 
 DEFINE_TRACE(ScopedStyleResolver::RuleSubSet) {
   visitor->trace(m_parentStyleSheet);
   visitor->trace(m_ruleSet);
 }
 
 }  // namespace blink