Re-enable vertical flow in SimplePath

Source/platform/fonts/GlyphPageTreeNode.cpp

 /*
  * Copyright (C) 2006, 2007, 2008 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 107 matching lines @@
             it->value->pruneFontData(fontData);
     }
 
     if (pageZeroRoot)
         pageZeroRoot->pruneFontData(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;
 }
 
 void GlyphPageTreeNode::initializePage(const FontData* fontData, unsigned pageNumber)
 {
     ASSERT(!m_page);
     ASSERT(fontData);
 
     // This function must not be called for the root of the tree, because that
     // level does not contain any glyphs.
@@ skipping 300 matching lines @@
     // entries may use different fonts depending on character. If the Font
     // ever finds it needs a glyph out of the system fallback page, it will
     // ask the system for the best font to use and fill that glyph in for us.
     if (GlyphPage* parentPage = m_parent->page())
         return parentPage->createCopiedSystemFallbackPage(this);
     return GlyphPage::createForMixedFontData(this);
 }
 
 } // namespace blink