Use downloadToFile option when XHR downloads a Blob

Source/core/fetch/ResourceFetcher.cpp

 /*
     Copyright (C) 1998 Lars Knoll (knoll@mpi-hd.mpg.de)
     Copyright (C) 2001 Dirk Mueller (mueller@kde.org)
     Copyright (C) 2002 Waldo Bastian (bastian@kde.org)
     Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
     Copyright (C) 2009 Torch Mobile Inc. http://www.torchmobile.com/
 
     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
@@ skipping 1168 matching lines @@
 void ResourceFetcher::didReceiveData(const Resource* resource, const char* data, int dataLength, int encodedDataLength, const ResourceLoaderOptions& options)
 {
     // FIXME: use frame of master document for imported documents.
     InspectorInstrumentationCookie cookie = InspectorInstrumentation::willReceiveResourceData(frame(), resource->identifier(), encodedDataLength);
     if (options.sendLoadCallbacks != SendCallbacks)
         return;
     context().dispatchDidReceiveData(m_documentLoader, resource->identifier(), data, dataLength, encodedDataLength);
     InspectorInstrumentation::didReceiveResourceData(cookie);
 }
 
+void ResourceFetcher::didDownloadData(const Resource* resource, int dataLength, int encodedDataLength, const ResourceLoaderOptions& options)
+{
+    InspectorInstrumentationCookie cookie = InspectorInstrumentation::willReceiveResourceData(frame(), resource->identifier(), encodedDataLength);
+    if (options.sendLoadCallbacks != SendCallbacks)
+        return;
+    context().dispatchDidDownloadData(m_documentLoader, resource->identifier(), dataLength, encodedDataLength);
+    InspectorInstrumentation::didReceiveResourceData(cookie);
+}
+
 void ResourceFetcher::subresourceLoaderFinishedLoadingOnePart(ResourceLoader* loader)
 {
     if (m_multipartLoaders)
         m_multipartLoaders->add(loader);
     if (m_loaders)
         m_loaders->remove(loader);
     if (Frame* frame = this->frame())
         return frame->loader().checkLoadComplete(m_documentLoader);
 }
 
@@ skipping 121 matching lines @@
 }
 #endif
 
 const ResourceLoaderOptions& ResourceFetcher::defaultResourceOptions()
 {
     DEFINE_STATIC_LOCAL(ResourceLoaderOptions, options, (SendCallbacks, SniffContent, BufferData, AllowStoredCredentials, ClientRequestedCredentials, AskClientForCrossOriginCredentials, DoSecurityCheck, CheckContentSecurityPolicy, DocumentContext));
     return options;
 }
 
 }