Fix RTL scroll bars being misrendered on Android.

Source/core/platform/ScrollableArea.h

Index: Source/core/platform/ScrollableArea.h
diff --git a/Source/core/platform/ScrollableArea.h b/Source/core/platform/ScrollableArea.h
index ca6614586a02dc056d037acb0d3c53ea05823d72..4494722b3fe4d5e686c7f1a196949ab4728d7fb6 100644
--- a/Source/core/platform/ScrollableArea.h
+++ b/Source/core/platform/ScrollableArea.h
@@ -27,7 +27,6 @@
 #define ScrollableArea_h
 
 #include "core/platform/Scrollbar.h"
-#include "core/platform/text/TextDirection.h"
 #include "wtf/Vector.h"
 
 namespace WebCore {
@@ -180,6 +179,7 @@ public:
     virtual void updateNeedsCompositedScrolling() { }
 
     virtual bool userInputScrollable(ScrollbarOrientation) const = 0;
+    virtual bool shouldPlaceVerticalScrollbarOnLeft() const = 0;
 
     // Convenience functions
     int scrollPosition(ScrollbarOrientation orientation) { return orientation == HorizontalScrollbar ? scrollPosition().x() : scrollPosition().y(); }
@@ -187,8 +187,6 @@ public:
     int maximumScrollPosition(ScrollbarOrientation orientation) { return orientation == HorizontalScrollbar ? maximumScrollPosition().x() : maximumScrollPosition().y(); }
     int clampScrollPosition(ScrollbarOrientation orientation, int pos)  { return std::max(std::min(pos, maximumScrollPosition(orientation)), minimumScrollPosition(orientation)); }
 
-    TextDirection textDirection() const;
-
 protected:
     ScrollableArea();
     virtual ~ScrollableArea();