[Blink] Adding Writing direction to the context menu for Aura.

Source/core/platform/ScrollView.h

 /*
  * Copyright (C) 2004, 2006, 2007, 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2009 Holger Hans Peter Freyther
  *
  * 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
@@ skipping 75 matching lines @@
     void setHorizontalScrollbarMode(ScrollbarMode mode, bool lock = false) { setScrollbarModes(mode, verticalScrollbarMode(), lock, verticalScrollbarLock()); }
     void setVerticalScrollbarMode(ScrollbarMode mode, bool lock = false) { setScrollbarModes(horizontalScrollbarMode(), mode, horizontalScrollbarLock(), lock); };
     void scrollbarModes(ScrollbarMode& horizontalMode, ScrollbarMode& verticalMode) const;
     ScrollbarMode horizontalScrollbarMode() const { ScrollbarMode horizontal, vertical; scrollbarModes(horizontal, vertical); return horizontal; }
     ScrollbarMode verticalScrollbarMode() const { ScrollbarMode horizontal, vertical; scrollbarModes(horizontal, vertical); return vertical; }
 
     void setHorizontalScrollbarLock(bool lock = true) { m_horizontalScrollbarLock = lock; }
     bool horizontalScrollbarLock() const { return m_horizontalScrollbarLock; }
     void setVerticalScrollbarLock(bool lock = true) { m_verticalScrollbarLock = lock; }
     bool verticalScrollbarLock() const { return m_verticalScrollbarLock; }
+    int verticalScrollbarWidth() const { return verticalScrollbar() ? verticalScrollbar()->width() : 0; }
 
     void setScrollingModesLock(bool lock = true) { m_horizontalScrollbarLock = m_verticalScrollbarLock = lock; }
 
     virtual void setCanHaveScrollbars(bool);
     bool canHaveScrollbars() const { return horizontalScrollbarMode() != ScrollbarAlwaysOff || verticalScrollbarMode() != ScrollbarAlwaysOff; }
 
     // By default you only receive paint events for the area that is visible. In the case of using a
     // tiled backing store, this function can be set, so that the view paints the entire contents.
     bool paintsEntireContents() const { return m_paintsEntireContents; }
     void setPaintsEntireContents(bool);
@@ skipping 246 matching lines @@
     ASSERT_WITH_SECURITY_IMPLICATION(!widget || widget->isScrollView());
     return static_cast<const ScrollView*>(widget);
 }
 
 // This will catch anyone doing an unnecessary cast.
 void toScrollView(const ScrollView*);
 
 } // namespace WebCore
 
 #endif // ScrollView_h