Remove code related to title directionality, we never used it

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 47 matching lines @@
 class FormSubmission;
 class FrameLoaderClient;
 class IconController;
 class NavigationAction;
 class Page;
 class ResourceError;
 class ResourceRequest;
 class ResourceResponse;
 class SecurityOrigin;
 class SerializedScriptValue;
-class StringWithDirection;
 class SubstituteData;
 
 struct FrameLoadRequest;
 struct WindowFeatures;
 
 bool isBackForwardLoadType(FrameLoadType);
 
 class FrameLoader {
     WTF_MAKE_NONCOPYABLE(FrameLoader);
 public:
@@ skipping 230 matching lines @@
     bool m_startingClientRedirect;
 
     SandboxFlags m_forcedSandboxFlags;
 
     RefPtr<HistoryItem> m_requestedHistoryItem;
 };
 
 } // namespace WebCore
 
 #endif // FrameLoader_h