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

Source/core/loader/DocumentThreadableLoader.cpp

 /*
  * Copyright (C) 2011, 2012 Google Inc. All rights reserved.
  * Copyright (C) 2013, Intel Corporation
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 432 matching lines @@
     // FIXME: ThreadableLoaderOptions.sniffContent is not supported for synchronous requests.
     Vector<char> data;
     ResourceError error;
     ResourceResponse response;
     unsigned long identifier = std::numeric_limits<unsigned long>::max();
     if (Frame* frame = m_document->frame()) {
         if (!m_document->fetcher()->checkInsecureContent(Resource::Raw, requestURL, options.mixedContentBlockingTreatment)) {
             m_client->didFail(error);
             return;
         }
-        identifier = frame->loader()->loadResourceSynchronously(request, m_options.allowCredentials, error, response, data);
+        identifier = m_document->fetcher()->fetchSynchronously(request, m_options.allowCredentials, error, response, data);
     }
 
     InspectorInstrumentation::documentThreadableLoaderStartedLoadingForClient(m_document, identifier, m_client);
 
     // No exception for file:/// resources, see <rdar://problem/4962298>.
     // Also, if we have an HTTP response, then it wasn't a network error in fact.
     if (!error.isNull() && !requestURL.isLocalFile() && response.httpStatusCode() <= 0) {
         m_client->didFail(error);
         return;
     }
@@ skipping 44 matching lines @@
 
     if (!(requestUrl.user().isEmpty() && requestUrl.pass().isEmpty())) {
         errorDescription = "The request was redirected to a URL ('" + requestUrl.string() + "') containing userinfo, which is disallowed for cross-origin requests.";
         return false;
     }
 
     return true;
 }
 
 } // namespace WebCore