Change CSSToStyleMap functions to take const CSSValue&s

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

 /*
  * (C) 1999-2003 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2008 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.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 28 matching lines @@
     , m_absoluteURL(url.string())
     , m_isCachePending(!image)
     , m_cachedImage(image)
 {
 }
 
 CSSImageValue::~CSSImageValue()
 {
 }
 
-StyleFetchedImage* CSSImageValue::cacheImage(Document* document, const ResourceLoaderOptions& options)
+StyleFetchedImage* CSSImageValue::cacheImage(Document* document, const ResourceLoaderOptions& options) const
 {
     ASSERT(document);
 
     if (m_isCachePending) {
         m_isCachePending = false;
 
         FetchRequest request(ResourceRequest(m_absoluteURL), m_initiatorName.isEmpty() ? FetchInitiatorTypeNames::css : m_initiatorName, options);
         request.mutableResourceRequest().setHTTPReferrer(SecurityPolicy::generateReferrer(m_referrer.referrerPolicy, request.url(), m_referrer.referrer));
 
         if (options.corsEnabled == IsCORSEnabled)
             request.setCrossOriginAccessControl(document->securityOrigin(), options.allowCredentials, options.credentialsRequested);
 
         if (ResourcePtr<ImageResource> cachedImage = ImageResource::fetch(request, document->fetcher()))
             m_cachedImage = StyleFetchedImage::create(cachedImage.get(), document);
     }
 
     return m_cachedImage.get();
 }
 
-void CSSImageValue::restoreCachedResourceIfNeeded(Document& document)
+void CSSImageValue::restoreCachedResourceIfNeeded(Document& document) const
 {
     if (m_isCachePending || !m_cachedImage || !document.fetcher())
         return;
     if (document.fetcher()->cachedResource(KURL(ParsedURLString, m_absoluteURL)))
         return;
 
     ImageResource* resource = m_cachedImage->cachedImage();
     if (!resource)
         return;
 
@@ skipping 26 matching lines @@
 {
     return m_cachedImage ? m_cachedImage->knownToBeOpaque(layoutObject) : false;
 }
 
 DEFINE_TRACE_AFTER_DISPATCH(CSSImageValue)
 {
     visitor->trace(m_cachedImage);
     CSSValue::traceAfterDispatch(visitor);
 }
 
-void CSSImageValue::reResolveURL(const Document& document)
+void CSSImageValue::reResolveURL(const Document& document) const
 {
     KURL url = document.completeURL(m_relativeURL);
     AtomicString urlString(url.string());
     if (urlString == m_absoluteURL)
         return;
     m_absoluteURL = urlString;
     m_isCachePending = true;
     m_cachedImage.clear();
 }
 
 } // namespace blink