Remove resource type-specific fetching logic from ResourceFetcher

Source/core/css/CSSImageSetValue.cpp

Index: Source/core/css/CSSImageSetValue.cpp
diff --git a/Source/core/css/CSSImageSetValue.cpp b/Source/core/css/CSSImageSetValue.cpp
index 2026b2a74d8c7ab82aa576ea10b3e2f8b6666bc8..414aab2ec2a7a1df20c2b05b1a31c91f746fb80c 100644
--- a/Source/core/css/CSSImageSetValue.cpp
+++ b/Source/core/css/CSSImageSetValue.cpp
@@ -112,7 +112,7 @@ StyleFetchedImageSet* CSSImageSetValue::cachedImageSet(Document* document, float
         if (options.corsEnabled == IsCORSEnabled)
             request.setCrossOriginAccessControl(document->securityOrigin(), options.allowCredentials, options.credentialsRequested);
 
-        if (ResourcePtr<ImageResource> cachedImage = document->fetcher()->fetchImage(request)) {
+        if (ResourcePtr<ImageResource> cachedImage = ImageResource::fetch(request, document->fetcher())) {
             m_imageSet = StyleFetchedImageSet::create(cachedImage.get(), image.scaleFactor, this);
             m_accessedBestFitImage = true;
         }