Re-enable vertical flow in SimplePath

Source/platform/fonts/GlyphPageTreeNode.cpp

Index: Source/platform/fonts/GlyphPageTreeNode.cpp
diff --git a/Source/platform/fonts/GlyphPageTreeNode.cpp b/Source/platform/fonts/GlyphPageTreeNode.cpp
index 6c1001d685b3c55752d3a4d44712696cb19c0fbb..6f9c11803e30f84f29872cf2671e71927073ea80 100644
--- a/Source/platform/fonts/GlyphPageTreeNode.cpp
+++ b/Source/platform/fonts/GlyphPageTreeNode.cpp
@@ -125,6 +125,8 @@ void GlyphPageTreeNode::pruneTreeFontData(const SimpleFontData* fontData)
 static bool fill(GlyphPage* pageToFill, unsigned offset, unsigned length, UChar* buffer, unsigned bufferLength, const SimpleFontData* fontData)
 {
     bool hasGlyphs = fontData->fillGlyphPage(pageToFill, offset, length, buffer, bufferLength);
+    if (hasGlyphs && fontData->verticalData())
+        fontData->verticalData()->substituteWithVerticalGlyphs(fontData, pageToFill, offset, length);
     return hasGlyphs;
 }