Prepare to add more initiator info to CachedResource(Request)

Source/core/css/CSSImageSetValue.cpp

 /*
  * Copyright (C) 2012 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 90 matching lines @@
         m_scaleFactor = 1;
 
     if (!m_imagesInSet.size())
         fillImageSet();
 
     if (!m_accessedBestFitImage) {
         // FIXME: In the future, we want to take much more than deviceScaleFactor into acount here. 
         // All forms of scale should be included: Page::pageScaleFactor(), Frame::pageZoomFactor(),
         // and any CSS transforms. https://bugs.webkit.org/show_bug.cgi?id=81698
         ImageWithScale image = bestImageForScaleFactor();
-        CachedResourceRequest request(ResourceRequest(document->completeURL(image.imageURL)));
-        request.setInitiator(cachedResourceRequestInitiators().css);
+        CachedResourceRequest request(ResourceRequest(document->completeURL(image.imageURL)), cachedResourceRequestInitiators().css);
         if (CachedResourceHandle<CachedImage> cachedImage = loader->requestImage(request)) {
             m_imageSet = StyleCachedImageSet::create(cachedImage.get(), image.scaleFactor, this);
             m_accessedBestFitImage = true;
         }
     }
 
     return (m_imageSet && m_imageSet->isCachedImageSet()) ? static_cast<StyleCachedImageSet*>(m_imageSet.get()) : 0;
 }
 
 StyleImage* CSSImageSetValue::cachedOrPendingImageSet(Document* document)
@@ skipping 75 matching lines @@
     info.addMember(m_imagesInSet, "imagesInSet");
 }
 
 void CSSImageSetValue::ImageWithScale::reportMemoryUsage(MemoryObjectInfo* memoryObjectInfo) const
 {
     MemoryClassInfo info(memoryObjectInfo, this, WebCoreMemoryTypes::CSS);
     info.addMember(imageURL, "imageURL");
 }
 
 } // namespace WebCore