Reduced the callers to the non-const version of CSSValueList::item()

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

 /*
  * Copyright (C) 2007, 2010 Apple 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
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 67 matching lines @@
 static void setCrossOriginAccessControl(FetchRequest& request, SecurityOrigin* securityOrigin)
 {
     // Local fonts are accessible from file: URLs even when
     // allowFileAccessFromFileURLs is false.
     if (request.url().isLocalFile())
         return;
 
     request.setCrossOriginAccessControl(securityOrigin, CrossOriginAttributeAnonymous);
 }
 
-FontResource* CSSFontFaceSrcValue::fetch(Document* document)
+FontResource* CSSFontFaceSrcValue::fetch(Document* document) const
 {
     if (!m_fetched) {
         FetchRequest request(ResourceRequest(m_absoluteResource), FetchInitiatorTypeNames::css);
         request.setContentSecurityCheck(m_shouldCheckContentSecurityPolicy);
         SecurityOrigin* securityOrigin = document->getSecurityOrigin();
         setCrossOriginAccessControl(request, securityOrigin);
         request.mutableResourceRequest().setHTTPReferrer(SecurityPolicy::generateReferrer(m_referrer.referrerPolicy, request.url(), m_referrer.referrer));
         FontResource* resource = FontResource::fetch(request, document->fetcher());
         if (!resource)
             return nullptr;
         m_fetched = FontResourceHelper::create(resource);
     } else {
         // FIXME: CSSFontFaceSrcValue::fetch is invoked when @font-face rule
         // is processed by StyleResolver / StyleEngine.
         restoreCachedResourceIfNeeded(document);
     }
     return m_fetched->resource();
 }
 
-void CSSFontFaceSrcValue::restoreCachedResourceIfNeeded(Document* document)
+void CSSFontFaceSrcValue::restoreCachedResourceIfNeeded(Document* document) const
 {
     ASSERT(m_fetched);
     ASSERT(document && document->fetcher());
 
     const String resourceURL = document->completeURL(m_absoluteResource);
     if (document->fetcher()->cachedResource(KURL(ParsedURLString, resourceURL)))
         return;
 
     FetchRequest request(ResourceRequest(resourceURL), FetchInitiatorTypeNames::css);
     request.setContentSecurityCheck(m_shouldCheckContentSecurityPolicy);
     MixedContentChecker::shouldBlockFetch(document->frame(), m_fetched->resource()->lastResourceRequest(),
         m_fetched->resource()->lastResourceRequest().url(), MixedContentChecker::SendReport);
     document->fetcher()->requestLoadStarted(m_fetched->resource(), request, ResourceFetcher::ResourceLoadingFromCache);
 }
 
 bool CSSFontFaceSrcValue::equals(const CSSFontFaceSrcValue& other) const
 {
     return m_isLocal == other.m_isLocal && m_format == other.m_format && m_specifiedResource == other.m_specifiedResource && m_absoluteResource == other.m_absoluteResource;
 }
 
 } // namespace blink