Update the ResourceRequest in DocumentLoader after the embedder modified it

Source/core/loader/DocumentLoader.cpp

 /*
  * Copyright (C) 2006, 2007, 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2011 Google 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.
@@ skipping 314 matching lines @@
     frameLoader()->client()->loadURLExternally(request, policy);
     return false;
 }
 
 void DocumentLoader::redirectReceived(Resource* resource, ResourceRequest& request, const ResourceResponse& redirectResponse)
 {
     ASSERT_UNUSED(resource, resource == m_mainResource);
     willSendRequest(request, redirectResponse);
 }
 
+void DocumentLoader::updateRequest(Resource* resource, const ResourceRequest& request)
+{
+    ASSERT_UNUSED(resource, resource == m_mainResource);
+    m_request = request;
+}
+
 static bool isFormSubmission(NavigationType type)
 {
     return type == NavigationTypeFormSubmitted || type == NavigationTypeFormResubmitted;
 }
 
 void DocumentLoader::willSendRequest(ResourceRequest& newRequest, const ResourceResponse& redirectResponse)
 {
     // Note that there are no asserts here as there are for the other callbacks. This is due to the
     // fact that this "callback" is sent when starting every load, and the state of callback
     // deferrals plays less of a part in this function in preventing the bad behavior deferring
@@ skipping 513 matching lines @@
 void DocumentLoader::replaceDocument(const String& source, Document* ownerDocument)
 {
     m_frame->loader().stopAllLoaders();
     m_writer = createWriterFor(m_frame, ownerDocument, m_frame->document()->url(), mimeType(), m_writer ? m_writer->encoding() : emptyAtom,  m_writer ? m_writer->encodingWasChosenByUser() : false, true);
     if (!source.isNull())
         m_writer->appendReplacingData(source);
     endWriting(m_writer.get());
 }
 
 } // namespace WebCore