Add the text direction to the WebScrollbar interface.

Source/web/WebPluginScrollbarImpl.h

 /*
  * 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 24 matching lines @@
 class IntRect;
 class Scrollbar;
 }
 
 namespace WebKit {
 
 class ScrollbarGroup;
 
 class WebPluginScrollbarImpl : public WebPluginScrollbar {
 public:
-    WebPluginScrollbarImpl(Orientation,
-                     ScrollbarGroup*,
-                     WebPluginScrollbarClient*);
+    WebPluginScrollbarImpl(Orientation, ScrollbarGroup*, WebPluginScrollbarClient*);
     ~WebPluginScrollbarImpl();
 
     void setScrollOffset(int);
     void invalidateScrollbarRect(const WebCore::IntRect&);
     // FIXME: Combine this with the other getTickmarks method
     void getTickmarks(Vector<WebCore::IntRect>&) const;
     WebCore::IntPoint convertFromContainingViewToScrollbar(const WebCore::IntPoint& parentPoint) const;
     void scrollbarStyleChanged();
 
     int scrollOffset() { return m_scrollOffset; }
     WebCore::Scrollbar* scrollbar() { return m_scrollbar.get(); }
 
     // WebKit::WebScrollbar methods
     virtual bool isOverlay() const OVERRIDE;
     virtual int value() const OVERRIDE;
     virtual WebPoint location() const OVERRIDE;
     virtual WebSize size() const OVERRIDE;
     virtual bool enabled() const OVERRIDE;
     virtual int maximum() const OVERRIDE;
     virtual int totalSize() const OVERRIDE;
     virtual bool isScrollViewScrollbar() const OVERRIDE;
     virtual bool isScrollableAreaActive() const OVERRIDE;
     virtual void getTickmarks(WebVector<WebRect>& tickmarks) const OVERRIDE;
     virtual WebScrollbar::ScrollbarControlSize controlSize() const OVERRIDE;
     virtual WebScrollbar::ScrollbarPart pressedPart() const OVERRIDE;
     virtual WebScrollbar::ScrollbarPart hoveredPart() const OVERRIDE;
     virtual WebScrollbar::ScrollbarOverlayStyle scrollbarOverlayStyle() const OVERRIDE;
     virtual WebScrollbar::Orientation orientation() const OVERRIDE;
+    virtual bool isRightToLeft() const OVERRIDE;
     virtual bool isCustomScrollbar() const OVERRIDE;
 
     // WebKit::WebPluginScrollbar methods
     virtual void setLocation(const WebRect&) OVERRIDE;
     virtual void setValue(int position) OVERRIDE;
     virtual void setDocumentSize(int) OVERRIDE;
     virtual void scroll(ScrollDirection, ScrollGranularity, float multiplier) OVERRIDE;
     virtual void paint(WebCanvas*, const WebRect&) OVERRIDE;
     virtual bool handleInputEvent(const WebInputEvent&) OVERRIDE;
     virtual bool isAlphaLocked() const OVERRIDE;
@@ skipping 10 matching lines @@
     ScrollbarGroup* m_group;
     WebPluginScrollbarClient* m_client;
 
     int m_scrollOffset;
     RefPtr<WebCore::Scrollbar> m_scrollbar;
 };
 
 } // namespace WebKit
 
 #endif