Move synchronously fetching to ResourceFetcher, as well as most of the logic

Source/core/xml/XSLTProcessorLibxslt.cpp

Index: Source/core/xml/XSLTProcessorLibxslt.cpp
diff --git a/Source/core/xml/XSLTProcessorLibxslt.cpp b/Source/core/xml/XSLTProcessorLibxslt.cpp
index 6f86926eae71ba6c2feb10e368db5f772780ad8a..4ab991faba6d153492431070627731917c9db947 100644
--- a/Source/core/xml/XSLTProcessorLibxslt.cpp
+++ b/Source/core/xml/XSLTProcessorLibxslt.cpp
@@ -104,7 +104,7 @@ static xmlDocPtr docLoaderFunc(const xmlChar* uri,
 
         bool requestAllowed = globalResourceFetcher->frame() && globalResourceFetcher->document()->securityOrigin()->canRequest(url);
         if (requestAllowed) {
-            globalResourceFetcher->frame()->loader()->loadResourceSynchronously(url, AllowStoredCredentials, error, response, data);
+            globalResourceFetcher->fetchSynchronously(url, AllowStoredCredentials, error, response, data);
             requestAllowed = globalResourceFetcher->document()->securityOrigin()->canRequest(response.url());
         }
         if (!requestAllowed) {