First pass at removing dead vertical writing mode code.

sky/engine/core/rendering/RootInlineBox.cpp

Index: sky/engine/core/rendering/RootInlineBox.cpp
diff --git a/sky/engine/core/rendering/RootInlineBox.cpp b/sky/engine/core/rendering/RootInlineBox.cpp
index 843495bdd6e1d1b773e8b0b4b6a7bd5baeaf6830..3fbfb84044b92678d257843e45a1054a96fc8103 100644
--- a/sky/engine/core/rendering/RootInlineBox.cpp
+++ b/sky/engine/core/rendering/RootInlineBox.cpp
@@ -320,7 +320,7 @@ GapRects RootInlineBox::lineSelectionGap(RenderBlock* rootBlock, const LayoutPoi
         for (InlineBox* box = firstBox->nextLeafChild(); box; box = box->nextLeafChild()) {
             if (box->selectionState() != RenderObject::SelectionNone) {
                 LayoutRect logicalRect(lastLogicalLeft, selTop, box->logicalLeft() - lastLogicalLeft, selHeight);
-                logicalRect.move(renderer().isHorizontalWritingMode() ? offsetFromRootBlock : LayoutSize(offsetFromRootBlock.height(), offsetFromRootBlock.width()));
+                logicalRect.move(offsetFromRootBlock);
                 LayoutRect gapRect = rootBlock->logicalRectToPhysicalRect(rootBlockPhysicalPosition, logicalRect);
                 if (isPreviousBoxSelected && gapRect.width() > 0 && gapRect.height() > 0) {
                     if (paintInfo)
@@ -477,7 +477,7 @@ static bool isEditableLeaf(InlineBox* leaf)
 
 InlineBox* RootInlineBox::closestLeafChildForPoint(const IntPoint& pointInContents, bool onlyEditableLeaves)
 {
-    return closestLeafChildForLogicalLeftPosition(block().isHorizontalWritingMode() ? pointInContents.x() : pointInContents.y(), onlyEditableLeaves);
+    return closestLeafChildForLogicalLeftPosition(pointInContents.x(), onlyEditableLeaves);
 }
 
 InlineBox* RootInlineBox::closestLeafChildForLogicalLeftPosition(int leftPosition, bool onlyEditableLeaves)
@@ -736,7 +736,7 @@ LayoutUnit RootInlineBox::verticalPositionForBox(InlineBox* box, VerticalPositio
         const FontMetrics& fontMetrics = font.fontMetrics();
         int fontSize = font.fontDescription().computedPixelSize();
 
-        LineDirectionMode lineDirection = parent->isHorizontalWritingMode() ? HorizontalLine : VerticalLine;
+        LineDirectionMode lineDirection = HorizontalLine;
 
         if (verticalAlign == SUB)
             verticalPosition += fontSize / 5 + 1;