Optimize for horizontal writing mode

Source/core/rendering/RenderText.cpp

 /*
  * (C) 1999 Lars Knoll (knoll@kde.org)
  * (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Andrew Wellington (proton@wiretapped.net)
  * Copyright (C) 2006 Graham Dennis (graham.dennis@gmail.com)
  *
  * 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
@@ skipping 585 matching lines @@
     return createPositionWithAffinityForBox(box, box->caretLeftmostOffset(), shouldAffinityBeDownstream);
 }
 
 PositionWithAffinity RenderText::positionForPoint(const LayoutPoint& point)
 {
     if (!firstTextBox() || textLength() == 0)
         return createPositionWithAffinity(0, DOWNSTREAM);
 
     LayoutUnit pointLineDirection = firstTextBox()->isHorizontal() ? point.x() : point.y();
     LayoutUnit pointBlockDirection = firstTextBox()->isHorizontal() ? point.y() : point.x();
-    bool blocksAreFlipped = style()->isFlippedBlocksWritingMode();
+    bool blocksAreFlipped = style()->slowIsFlippedBlocksWritingMode();
 
     InlineTextBox* lastBox = 0;
     for (InlineTextBox* box = firstTextBox(); box; box = box->nextTextBox()) {
         if (box->isLineBreak() && !box->prevLeafChild() && box->nextLeafChild() && !box->nextLeafChild()->isLineBreak())
             box = box->nextTextBox();
 
         RootInlineBox& rootBox = box->root();
         LayoutUnit top = std::min(rootBox.selectionTop(), rootBox.lineTop());
         if (pointBlockDirection > top || (!blocksAreFlipped && pointBlockDirection == top)) {
             LayoutUnit bottom = rootBox.selectionBottom();
@@ skipping 1246 matching lines @@
     }
     secureTextTimer->restartWithNewText(lastTypedCharacterOffset);
 }
 
 PassRefPtr<AbstractInlineTextBox> RenderText::firstAbstractInlineTextBox()
 {
     return AbstractInlineTextBox::getOrCreate(this, m_firstTextBox);
 }
 
 } // namespace blink