Remove code related to title directionality, we never used it

Source/core/loader/HistoryController.h

 /*
  * Copyright (C) 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  *
  * 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 22 matching lines @@
 #include "core/history/HistoryItem.h"
 #include "core/loader/FrameLoaderTypes.h"
 #include "wtf/Noncopyable.h"
 #include "wtf/RefPtr.h"
 #include "wtf/text/WTFString.h"
 
 namespace WebCore {
 
 class Frame;
 class SerializedScriptValue;
-class StringWithDirection;
 
 class HistoryController {
     WTF_MAKE_NONCOPYABLE(HistoryController);
 public:
     explicit HistoryController(Frame*);
     ~HistoryController();
 
     void saveScrollPositionAndViewStateToItem(HistoryItem*);
     void clearScrollPositionAndViewState();
     void restoreScrollPositionAndViewState();
 
     void updateBackForwardListForFragmentScroll();
 
     void saveDocumentState();
     void saveDocumentAndScrollState();
     void restoreDocumentState();
 
     void updateForCommit();
     void updateForSameDocumentNavigation();
 
     HistoryItem* currentItem() const { return m_currentItem.get(); }
     void setCurrentItem(HistoryItem*);
-    void setCurrentItemTitle(const StringWithDirection&);
+    void setCurrentItemTitle(const String&);
     bool currentItemShouldBeReplaced() const;
 
     HistoryItem* previousItem() const { return m_previousItem.get(); }
 
     HistoryItem* provisionalItem() const { return m_provisionalItem.get(); }
     void setProvisionalItem(HistoryItem*);
 
     void pushState(PassRefPtr<SerializedScriptValue>, const String& title, const String& url);
     void replaceState(PassRefPtr<SerializedScriptValue>, const String& title, const String& url);
 
@@ skipping 30 matching lines @@
     RefPtr<HistoryItem> m_previousItem;
     RefPtr<HistoryItem> m_provisionalItem;
 
     bool m_defersLoading;
     RefPtr<HistoryItem> m_deferredItem;
 };
 
 } // namespace WebCore
 
 #endif // HistoryController_h