Reland "Fix form resubmissions happening silently."

Source/core/loader/FrameLoader.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2008 Alp Toker <alp@atoker.com>
  * Copyright (C) Research In Motion Limited 2009. All rights reserved.
  * Copyright (C) 2011 Kris Jordan <krisjordan@gmail.com>
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ skipping 1630 matching lines @@
     ResourceRequest request(item->url());
     request.setHTTPReferrer(item->referrer());
     if (formData) {
         request.setHTTPMethod("POST");
         request.setHTTPBody(formData);
         request.setHTTPContentType(item->formContentType());
         RefPtr<SecurityOrigin> securityOrigin = SecurityOrigin::createFromString(item->referrer());
         addHTTPOriginIfNeeded(request, securityOrigin->toString());
     }
 
-    loadWithNavigationAction(request, NavigationAction(request, FrameLoadTypeBackForward, false), FrameLoadTypeBackForward, 0, SubstituteData());
+    loadWithNavigationAction(request, NavigationAction(request, FrameLoadTypeBackForward, formData), FrameLoadTypeBackForward, 0, SubstituteData());
 }
 
 void FrameLoader::insertDummyHistoryItem()
 {
     RefPtr<HistoryItem> currentItem = HistoryItem::create();
     history()->setCurrentItem(currentItem.get());
     frame()->page()->backForward().setCurrentItem(currentItem.get());
 }
 
 void FrameLoader::dispatchDocumentElementAvailable()
@@ skipping 29 matching lines @@
 {
     SandboxFlags flags = m_forcedSandboxFlags;
     if (Frame* parentFrame = m_frame->tree()->parent())
         flags |= parentFrame->document()->sandboxFlags();
     if (HTMLFrameOwnerElement* ownerElement = m_frame->ownerElement())
         flags |= ownerElement->sandboxFlags();
     return flags;
 }
 
 } // namespace WebCore