Optimize for horizontal writing mode

Source/core/rendering/RenderReplaced.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2006, 2007 Apple Inc. All rights reserved.
  * Copyright (C) Research In Motion Limited 2011-2012. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
@@ skipping 427 matching lines @@
 LayoutRect RenderReplaced::localSelectionRect(bool checkWhetherSelected) const
 {
     if (checkWhetherSelected && !isSelected())
         return LayoutRect();
 
     if (!inlineBoxWrapper())
         // We're a block-level replaced element.  Just return our own dimensions.
         return LayoutRect(LayoutPoint(), size());
 
     RootInlineBox& root = inlineBoxWrapper()->root();
-    LayoutUnit newLogicalTop = root.block().style()->isFlippedBlocksWritingMode() ? inlineBoxWrapper()->logicalBottom() - root.selectionBottom() : root.selectionTop() - inlineBoxWrapper()->logicalTop();
+    LayoutUnit newLogicalTop = root.block().style()->slowIsFlippedBlocksWritingMode() ? inlineBoxWrapper()->logicalBottom() - root.selectionBottom() : root.selectionTop() - inlineBoxWrapper()->logicalTop();
     if (root.block().style()->isHorizontalWritingMode())
         return LayoutRect(0, newLogicalTop, width(), root.selectionHeight());
     return LayoutRect(newLogicalTop, 0, root.selectionHeight(), height());
 }
 
 void RenderReplaced::setSelectionState(SelectionState state)
 {
     // The selection state for our containing block hierarchy is updated by the base class call.
     RenderBox::setSelectionState(state);
 
@@ skipping 37 matching lines @@
         return LayoutRect();
 
     // The selectionRect can project outside of the overflowRect, so take their union
     // for paint invalidation to avoid selection painting glitches.
     LayoutRect r = isSelected() ? localSelectionRect() : visualOverflowRect();
     mapRectToPaintInvalidationBacking(paintInvalidationContainer, r, paintInvalidationState);
     return r;
 }
 
 }