Add |WebTextDirection toWebTextDirection(TextDirection)|.

Source/web/ChromeClientImpl.cpp

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 538 matching lines @@
                 url = plugin->plugin()->linkAtPosition(result.roundedPointInInnerNodeFrame());
             }
         }
     }
 
     m_webView->client()->setMouseOverURL(url);
 }
 
 void ChromeClientImpl::setToolTip(const String& tooltipText, TextDirection dir)
 {
-    if (!m_webView->client())
-        return;
-    WebTextDirection textDirection = (dir == RTL) ?
-        WebTextDirectionRightToLeft :
-        WebTextDirectionLeftToRight;
-    m_webView->client()->setToolTipText(
-        tooltipText, textDirection);
+    if (m_webView->client())
+        m_webView->client()->setToolTipText(tooltipText, toWebTextDirection(dir));
 }
 
 void ChromeClientImpl::dispatchViewportPropertiesDidChange(const ViewportDescription& description) const
 {
     m_webView->updatePageDefinedViewportConstraints(description);
 }
 
 void ChromeClientImpl::print(LocalFrame* frame)
 {
     if (m_webView->client())
@@ skipping 298 matching lines @@
         m_webView->autofillClient()->textFieldDidEndEditing(WebInputElement(&inputElement));
 }
 
 void ChromeClientImpl::openTextDataListChooser(HTMLInputElement& input)
 {
     if (m_webView->autofillClient())
         m_webView->autofillClient()->openTextDataListChooser(WebInputElement(&input));
 }
 
 } // namespace blink