Remove base URL, referrer, and charset setters from CSSParserContext

third_party/WebKit/Source/core/css/StyleRuleImport.cpp

 /*
  * (C) 1999-2003 Lars Knoll (knoll@kde.org)
  * (C) 2002-2003 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2002, 2005, 2006, 2008, 2009, 2010, 2012 Apple Inc. All rights
  * reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
@@ skipping 54 matching lines @@
 }
 
 void StyleRuleImport::setCSSStyleSheet(
     const String& href,
     const KURL& baseURL,
     const String& charset,
     const CSSStyleSheetResource* cachedStyleSheet) {
   if (m_styleSheet)
     m_styleSheet->clearOwnerRule();
 
-  CSSParserContext* context = CSSParserContext::create(
-      m_parentStyleSheet ? m_parentStyleSheet->parserContext()
-                         : strictCSSParserContext(),
-      nullptr);
-  context->setCharset(charset);
-  Document* document =
-      m_parentStyleSheet ? m_parentStyleSheet->singleOwnerDocument() : nullptr;
-  if (!baseURL.isNull()) {
-    context->setBaseURL(baseURL);
-    if (document) {
-      context->setReferrer(Referrer(baseURL.strippedForUseAsReferrer(),
-                                    document->getReferrerPolicy()));
-    }
+  Document* document = nullptr;
+  const CSSParserContext* context = strictCSSParserContext();
+  if (m_parentStyleSheet) {
+    document = m_parentStyleSheet->singleOwnerDocument();
+    context = m_parentStyleSheet->parserContext();
   }
+  context = CSSParserContext::create(
+      context, baseURL, charset,
+      (!baseURL.isNull() && document)
+          ? Referrer(baseURL.strippedForUseAsReferrer(),
+                     document->getReferrerPolicy())
+          : context->referrer(),
+      document);
 
   m_styleSheet = StyleSheetContents::create(this, href, context);
 
   m_styleSheet->parseAuthorStyleSheet(
       cachedStyleSheet, document ? document->getSecurityOrigin() : 0);
 
   m_loading = false;
 
   if (m_parentStyleSheet) {
     m_parentStyleSheet->notifyLoadedSheet(cachedStyleSheet);
@@ skipping 45 matching lines @@
     // the sheet being imported is pending.
     if (m_parentStyleSheet && m_parentStyleSheet->loadCompleted() &&
         rootSheet == m_parentStyleSheet)
       m_parentStyleSheet->startLoadingDynamicSheet();
     m_loading = true;
     m_resource->addClient(m_styleSheetClient);
   }
 }
 
 }  // namespace blink