Add the text direction to the WebScrollbar interface.

Source/core/platform/chromium/support/WebScrollbarImpl.cpp

 /*
  * Copyright (C) 2012 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:
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
  *     notice, this list of conditions and the following disclaimer in the
@@ skipping 10 matching lines @@
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "config.h"
 
 #include "core/platform/chromium/support/WebScrollbarImpl.h"
 
 #include "core/platform/Scrollbar.h"
 #include "core/platform/graphics/IntRect.h"
+#include "core/platform/text/TextDirection.h"
 
 namespace WebKit {
 
 WebScrollbarImpl::WebScrollbarImpl(WebCore::Scrollbar* scrollbar)
     : m_scrollbar(scrollbar)
 {
 }
 
 bool WebScrollbarImpl::isOverlay() const
 {
@@ skipping 70 matching lines @@
 WebScrollbar::ScrollbarOverlayStyle WebScrollbarImpl::scrollbarOverlayStyle() const
 {
     return static_cast<WebScrollbar::ScrollbarOverlayStyle>(m_scrollbar->scrollbarOverlayStyle());
 }
 
 WebScrollbar::Orientation WebScrollbarImpl::orientation() const
 {
     return static_cast<WebScrollbar::Orientation>(m_scrollbar->orientation());
 }
 
+bool WebScrollbarImpl::isRightToLeft() const
+{
+    return m_scrollbar->textDirection() == WebCore::RTL;
+}
+
 bool WebScrollbarImpl::isCustomScrollbar() const
 {
     return m_scrollbar->isCustomScrollbar();
 }
 
 bool WebScrollbarImpl::isAlphaLocked() const
 {
     return m_scrollbar->isAlphaLocked();
 }
 
 void WebScrollbarImpl::setIsAlphaLocked(bool flag)
 {
     m_scrollbar->setIsAlphaLocked(flag);
 }
 
 } // namespace WebKit