Add Unicode Variation Selector support to harfBuzzGetGlyph

Source/platform/fonts/shaping/HarfBuzzShaper.h

 /*
  * Copyright (C) 2012 Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 60 matching lines @@
     {
         if (runIndex < m_harfBuzzRuns.size()) {
             startIndex = m_harfBuzzRuns[runIndex]->startIndex();
             numGlyphs = m_harfBuzzRuns[runIndex]->numGlyphs();
             script = m_harfBuzzRuns[runIndex]->script();
             return true;
         }
         return false;
     }
 
+    uint16_t glyphForTesting(unsigned runIndex, size_t glyphIndex)
+    {
+        return m_harfBuzzRuns[runIndex]->glyphData(glyphIndex).glyph;
+    }
+
+    float advanceForTesting(unsigned runIndex, size_t glyphIndex)
+    {
+        return m_harfBuzzRuns[runIndex]->glyphData(glyphIndex).advance;
+    }
+
 private:
     struct HarfBuzzRunGlyphData {
         uint16_t glyph;
         uint16_t characterIndex;
         float advance;
         FloatSize offset;
     };
 
     class PLATFORM_EXPORT HarfBuzzRun {
     public:
@@ skipping 69 matching lines @@
     int m_toIndex;
 
     float m_totalWidth;
 
     friend struct CachedShapingResults;
 };
 
 } // namespace blink
 
 #endif // HarfBuzzShaper_h