Remove code related to title directionality, we never used it

Source/core/dom/Document.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
@@ skipping 30 matching lines @@
 #include "core/dom/ScriptExecutionContext.h"
 #include "core/dom/TextLinkColors.h"
 #include "core/dom/TreeScope.h"
 #include "core/dom/UserActionElementSet.h"
 #include "core/dom/ViewportArguments.h"
 #include "core/html/CollectionType.h"
 #include "core/page/FocusDirection.h"
 #include "core/page/PageVisibilityState.h"
 #include "weborigin/ReferrerPolicy.h"
 #include "core/platform/Timer.h"
-#include "core/platform/text/StringWithDirection.h"
 #include "core/rendering/HitTestRequest.h"
 #include "wtf/Deque.h"
 #include "wtf/HashSet.h"
 #include "wtf/OwnPtr.h"
 #include "wtf/PassOwnPtr.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/WeakPtr.h"
 
 namespace WebCore {
 
@@ skipping 693 matching lines @@
     void updateViewportArguments();
     void processReferrerPolicy(const String& policy);
 
     // Returns the owning element in the parent document.
     // Returns 0 if this is the top level document.
     HTMLFrameOwnerElement* ownerElement() const;
 
     HTMLIFrameElement* seamlessParentIFrame() const;
     bool shouldDisplaySeamlesslyWithParent() const;
 
-    // Used by DOM bindings; no direction known.
-    String title() const { return m_title.string(); }
+    String title() const { return m_title; }
     void setTitle(const String&);
 
-    const StringWithDirection& titleWithDirection() const { return m_title; }
-
     Element* titleElement() const { return m_titleElement.get(); }
-    void setTitleElement(const StringWithDirection&, Element* titleElement);
+    void setTitleElement(const String& title, Element* titleElement);
     void removeTitle(Element* titleElement);
 
     String cookie(ExceptionState&) const;
     void setCookie(const String&, ExceptionState&);
 
     String referrer() const;
 
     String domain() const;
     void setDomain(const String& newDomain, ExceptionState&);
 
@@ skipping 319 matching lines @@
     virtual PassOwnPtr<LifecycleNotifier> createLifecycleNotifier() OVERRIDE;
 
     virtual const KURL& virtualURL() const; // Same as url(), but needed for ScriptExecutionContext to implement it without a performance loss for direct calls.
     virtual KURL virtualCompleteURL(const String&) const; // Same as completeURL() for the same reason as above.
 
     virtual void addMessage(MessageSource, MessageLevel, const String& message, const String& sourceURL, unsigned lineNumber, ScriptState*);
     void internalAddMessage(MessageSource, MessageLevel, const String& message, const String& sourceURL, unsigned lineNumber, PassRefPtr<ScriptCallStack>, ScriptState*);
 
     virtual double timerAlignmentInterval() const;
 
-    void updateTitle(const StringWithDirection&);
+    void updateTitle(const String&);
     void updateFocusAppearanceTimerFired(Timer<Document>*);
     void updateBaseURL();
 
     void createStyleResolver();
 
     void executeScriptsWaitingForResourcesIfNeeded();
 
     void seamlessParentUpdatedStylesheets();
 
     PassRefPtr<NodeList> handleZeroPadding(const HitTestRequest&, HitTestResult&) const;
@@ skipping 119 matching lines @@
 
     bool m_gotoAnchorNeededAfterStylesheetsLoad;
     bool m_isDNSPrefetchEnabled;
     bool m_haveExplicitlyDisabledDNSPrefetch;
     bool m_containsValidityStyleRules;
     bool m_updateFocusAppearanceRestoresSelection;
 
     // http://www.whatwg.org/specs/web-apps/current-work/#ignore-destructive-writes-counter
     unsigned m_ignoreDestructiveWriteCount;
 
-    StringWithDirection m_title;
-    StringWithDirection m_rawTitle;
+    String m_title;
+    String m_rawTitle;
     bool m_titleSetExplicitly;
     RefPtr<Element> m_titleElement;
 
     OwnPtr<AXObjectCache> m_axObjectCache;
     OwnPtr<DocumentMarkerController> m_markers;
 
     Timer<Document> m_updateFocusAppearanceTimer;
 
     Element* m_cssTarget;
 
@@ skipping 164 matching lines @@
 inline bool Node::isDocumentNode() const
 {
     return this == documentInternal();
 }
 
 Node* eventTargetNodeForDocument(Document*);
 
 } // namespace WebCore
 
 #endif // Document_h