Revert "Create errors (especially cancellation errors) internally to WebCore, rather"

Source/core/loader/FrameLoader.h

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) Research In Motion Limited 2009. 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:
  *
@@ skipping 137 matching lines @@
     FrameState state() const { return m_state; }
 
     const ResourceRequest& originalRequest() const;
     const ResourceRequest& initialRequest() const;
     void receivedMainResourceError(const ResourceError&);
 
     bool willLoadMediaElementURL(KURL&);
 
     void handleFallbackContent();
 
+    ResourceError cancelledError(const ResourceRequest&) const;
+
     bool isHostedByObjectElement() const;
     bool isLoadingMainFrame() const;
 
     bool isReplacing() const;
     void setReplacing();
     bool subframeIsLoading() const;
     void didChangeTitle(DocumentLoader*);
     void didChangeIcons(IconType);
 
     bool shouldTreatURLAsSrcdocDocument(const KURL&) const;
@@ skipping 257 matching lines @@
 // the frame name references a frame different from the openerFrame, e.g. when it is
 // "_self" or "_parent".
 //
 // FIXME: Consider making this function part of an appropriate class (not FrameLoader)
 // and moving it to a more appropriate location.
 Frame* createWindow(Frame* openerFrame, Frame* lookupFrame, const FrameLoadRequest&, const WindowFeatures&, bool& created);
 
 } // namespace WebCore
 
 #endif // FrameLoader_h