Optimize for horizontal writing mode

Source/core/rendering/RenderInline.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009 Apple Inc. 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 1110 matching lines @@
     if (isRelPositioned())
         offset += offsetForInFlowPosition();
 
     offset += container->columnOffset(point);
 
     if (container->hasOverflowClip())
         offset -= toRenderBox(container)->scrolledContentOffset();
 
     if (offsetDependsOnPoint) {
         *offsetDependsOnPoint = container->hasColumns()
-            || (container->isBox() && container->style()->isFlippedBlocksWritingMode())
+            || (container->isBox() && container->style()->slowIsFlippedBlocksWritingMode())
             || container->isRenderFlowThread();
     }
 
     return offset;
 }
 
 void RenderInline::mapLocalToContainer(const RenderLayerModelObject* paintInvalidationContainer, TransformState& transformState, MapCoordinatesFlags mode, bool* wasFixed, const PaintInvalidationState* paintInvalidationState) const
 {
     if (paintInvalidationContainer == this)
         return;
 
     if (paintInvalidationState && paintInvalidationState->canMapToContainer(paintInvalidationContainer)) {
         LayoutSize offset = paintInvalidationState->paintOffset();
         if (style()->hasInFlowPosition() && layer())
             offset += layer()->offsetForInFlowPosition();
         transformState.move(offset);
         return;
     }
 
     bool containerSkipped;
     RenderObject* o = container(paintInvalidationContainer, &containerSkipped);
     if (!o)
         return;
 
     if (mode & ApplyContainerFlip && o->isBox()) {
-        if (o->style()->isFlippedBlocksWritingMode()) {
+        if (o->style()->slowIsFlippedBlocksWritingMode()) {
             IntPoint centerPoint = roundedIntPoint(transformState.mappedPoint());
             transformState.move(toRenderBox(o)->flipForWritingModeIncludingColumns(centerPoint) - centerPoint);
         }
         mode &= ~ApplyContainerFlip;
     }
 
     LayoutSize containerOffset = offsetFromContainer(o, roundedLayoutPoint(transformState.mappedPoint()));
 
     bool preserve3D = mode & UseTransforms && (o->style()->preserves3D() || style()->preserves3D());
     if (mode & UseTransforms && shouldUseTransformFromContainer(o)) {
@@ skipping 242 matching lines @@
         container = this;
 
     FloatPoint absPos = container->localToAbsolute();
     region.bounds.setX(absPos.x() + region.bounds.x());
     region.bounds.setY(absPos.y() + region.bounds.y());
 
     regions.append(region);
 }
 
 } // namespace blink