Optimize for horizontal writing mode

Source/core/rendering/RenderBox.cpp

Index: Source/core/rendering/RenderBox.cpp
diff --git a/Source/core/rendering/RenderBox.cpp b/Source/core/rendering/RenderBox.cpp
index 356f8d868f1f483623db8d66f6b639b43fb3d2ac..1a192ba6dcb31c3b79d3fff7209939c349f012b4 100644
--- a/Source/core/rendering/RenderBox.cpp
+++ b/Source/core/rendering/RenderBox.cpp
@@ -4339,6 +4339,8 @@ LayoutUnit RenderBox::offsetTop() const
 
 LayoutPoint RenderBox::flipForWritingModeForChild(const RenderBox* child, const LayoutPoint& point) const
 {
+    if (!UNLIKELY(document().hasVerticalWritingMode()))
+        return point;
     if (!style()->isFlippedBlocksWritingMode())
         return point;
 
@@ -4349,63 +4351,15 @@ LayoutPoint RenderBox::flipForWritingModeForChild(const RenderBox* child, const
     return LayoutPoint(point.x() + width() - child->width() - (2 * child->x()), point.y());
 }
 
-void RenderBox::flipForWritingMode(LayoutRect& rect) const
-{
-    if (!style()->isFlippedBlocksWritingMode())
-        return;
-
-    if (isHorizontalWritingMode())
-        rect.setY(height() - rect.maxY());
-    else
-        rect.setX(width() - rect.maxX());
-}
-
-LayoutUnit RenderBox::flipForWritingMode(LayoutUnit position) const
-{
-    if (!style()->isFlippedBlocksWritingMode())
-        return position;
-    return logicalHeight() - position;
-}
-
-LayoutPoint RenderBox::flipForWritingMode(const LayoutPoint& position) const
-{
-    if (!style()->isFlippedBlocksWritingMode())
-        return position;
-    return isHorizontalWritingMode() ? LayoutPoint(position.x(), height() - position.y()) : LayoutPoint(width() - position.x(), position.y());
-}
-
 LayoutPoint RenderBox::flipForWritingModeIncludingColumns(const LayoutPoint& point) const
 {
+    if (!UNLIKELY(document().hasVerticalWritingMode()))
+        return point;
     if (!hasColumns() || !style()->isFlippedBlocksWritingMode())
         return flipForWritingMode(point);
     return toRenderBlock(this)->flipForWritingModeIncludingColumns(point);
 }
 
-LayoutSize RenderBox::flipForWritingMode(const LayoutSize& offset) const
-{
-    if (!style()->isFlippedBlocksWritingMode())
-        return offset;
-    return isHorizontalWritingMode() ? LayoutSize(offset.width(), height() - offset.height()) : LayoutSize(width() - offset.width(), offset.height());
-}
-
-FloatPoint RenderBox::flipForWritingMode(const FloatPoint& position) const
-{
-    if (!style()->isFlippedBlocksWritingMode())
-        return position;
-    return isHorizontalWritingMode() ? FloatPoint(position.x(), height() - position.y()) : FloatPoint(width() - position.x(), position.y());
-}
-
-void RenderBox::flipForWritingMode(FloatRect& rect) const
-{
-    if (!style()->isFlippedBlocksWritingMode())
-        return;
-
-    if (isHorizontalWritingMode())
-        rect.setY(height() - rect.maxY());
-    else
-        rect.setX(width() - rect.maxX());
-}
-
 LayoutPoint RenderBox::topLeftLocation() const
 {
     RenderBlock* containerBlock = containingBlock();