Fix RTL scroll bars being misrendered on Android.

Source/core/rendering/RenderLayer.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  *
  * Portions are Copyright (C) 1998 Netscape Communications Corporation.
  *
  * Other contributors:
  *   Robert O'Callahan <roc+@cs.cmu.edu>
  *   David Baron <dbaron@fas.harvard.edu>
  *   Christian Biesinger <cbiesinger@web.de>
  *   Randall Jesup <rjesup@wgate.com>
@@ skipping 1371 matching lines @@
     ASSERT(box);
 
     if (box->isIntristicallyScrollable(orientation))
         return true;
 
     EOverflow overflowStyle = (orientation == HorizontalScrollbar) ?
         renderer()->style()->overflowX() : renderer()->style()->overflowY();
     return (overflowStyle == OSCROLL || overflowStyle == OAUTO || overflowStyle == OOVERLAY);
 }
 
+bool RenderLayer::shouldPlaceVerticalScrollbarOnLeft() const
+{
+    return renderer()->style()->shouldPlaceBlockDirectionScrollbarOnLogicalLeft();
+}
+
 int RenderLayer::pageStep(ScrollbarOrientation orientation) const
 {
     RenderBox* box = renderBox();
     ASSERT(box);
 
     int length = (orientation == HorizontalScrollbar) ?
         box->pixelSnappedClientWidth() : box->pixelSnappedClientHeight();
     int minPageStep = static_cast<float>(length) * ScrollableArea::minFractionToStepWhenPaging();
     int pageStep = max(minPageStep, length - ScrollableArea::maxOverlapBetweenPages());
 
@@ skipping 4947 matching lines @@
     }
 }
 
 void showLayerTree(const WebCore::RenderObject* renderer)
 {
     if (!renderer)
         return;
     showLayerTree(renderer->enclosingLayer());
 }
 #endif