Fix rtl text shifting in PopupListBox

Source/web/PopupListBox.h

 /*
  * 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 127 matching lines @@
 
     // Computes the size of widget and children.
     virtual void layout() OVERRIDE;
 
     // Returns whether the popup wants to process events for the passed key.
     bool isInterestedInEventForKey(int keyCode);
 
     // Gets the height of a row.
     int getRowHeight(int index);
 
+    int getRowBaseWidth(int index);
+
     virtual void setMaxHeight(int maxHeight) OVERRIDE { m_maxHeight = maxHeight; }
 
     void setMaxWidth(int maxWidth) { m_maxWindowWidth = maxWidth; }
 
     virtual void setMaxWidthAndLayout(int) OVERRIDE;
 
     void disconnectClient() { m_popupClient = 0; }
 
     const Vector<PopupItem*>& items() const { return m_items; }
 
@@ skipping 115 matching lines @@
     // If width exeeds screen width, we have to clip it.
     int m_maxWindowWidth;
 
     // To forward last mouse release event.
     RefPtrWillBePersistent<blink::Element> m_focusedElement;
 };
 
 } // namespace blink
 
 #endif