Delete a ton more dead vertical writing mode code.

sky/engine/core/rendering/InlineTextBox.cpp

Index: sky/engine/core/rendering/InlineTextBox.cpp
diff --git a/sky/engine/core/rendering/InlineTextBox.cpp b/sky/engine/core/rendering/InlineTextBox.cpp
index 2f8f54719975cf31c1e82338a18be953075eca70..901d57d5ea6c983198c66974bf5682a3f4851b75 100644
--- a/sky/engine/core/rendering/InlineTextBox.cpp
+++ b/sky/engine/core/rendering/InlineTextBox.cpp
@@ -748,7 +748,7 @@ void InlineTextBox::paintSelection(GraphicsContext* context, const FloatPoint& b
     LayoutUnit selectionBottom = root().selectionBottom();
     LayoutUnit selectionTop = root().selectionTopAdjustedForPrecedingBlock();
 
-    int deltaY = roundToInt(renderer().style()->isFlippedLinesWritingMode() ? selectionBottom - logicalBottom() : logicalTop() - selectionTop);
+    int deltaY = roundToInt(logicalTop() - selectionTop);
     int selHeight = std::max(0, roundToInt(selectionBottom - selectionTop));
 
     FloatPoint localOrigin(boxOrigin.x(), boxOrigin.y() - deltaY);
@@ -779,7 +779,7 @@ void InlineTextBox::paintSingleCompositionBackgroundRun(GraphicsContext* context
     if (sPos >= ePos)
         return;
 
-    int deltaY = renderer().style()->isFlippedLinesWritingMode() ? selectionBottom() - logicalBottom() : logicalTop() - selectionTop();
+    int deltaY = logicalTop() - selectionTop();
     int selHeight = selectionHeight();
     FloatPoint localOrigin(boxOrigin.x(), boxOrigin.y() - deltaY);
     context->drawHighlightForText(font, constructTextRun(style, font), localOrigin, selHeight, backgroundColor, sPos, ePos);
@@ -1092,7 +1092,7 @@ void InlineTextBox::paintDocumentMarker(GraphicsContext* pt, const FloatPoint& b
             endPosition = std::min<int>(endPosition, m_truncation);
 
         // Calculate start & width
-        int deltaY = renderer().style()->isFlippedLinesWritingMode() ? selectionBottom() - logicalBottom() : logicalTop() - selectionTop();
+        int deltaY = logicalTop() - selectionTop();
         int selHeight = selectionHeight();
         FloatPoint startPoint(boxOrigin.x(), boxOrigin.y() - deltaY);
         TextRun run = constructTextRun(style, font);