Linux doubles line gap when no VDMX table present

Source/core/platform/graphics/skia/SimpleFontDataSkia.cpp

 /*
  * Copyright (c) 2008, 2009, 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 71 matching lines @@
 
     float ascent;
     float descent;
 
     // Beware those who step here: This code is designed to match Win32 font
     // metrics *exactly* (except the adjustment of ascent/descent on Linux/Android).
     if (isVDMXValid) {
         ascent = vdmxAscent;
         descent = -vdmxDescent;
     } else {
-        SkScalar height = -metrics.fAscent + metrics.fDescent + metrics.fLeading;
         ascent = SkScalarRound(-metrics.fAscent);
-        descent = SkScalarRound(height) - ascent;
+        descent = SkScalarRound(metrics.fDescent);
 #if OS(LINUX) || OS(ANDROID)
         // When subpixel positioning is enabled, if the descent is rounded down, the descent part
         // of the glyph may be truncated when displayed in a 'overflow: hidden' container.
         // To avoid that, borrow 1 unit from the ascent when possible.
         // FIXME: This can be removed if sub-pixel ascent/descent is supported.
         if (platformData().fontRenderStyle().useSubpixelPositioning && descent < SkScalarToFloat(metrics.fDescent) && ascent >= 1) {
             ++descent;
             --ascent;
         }
 #endif
@@ skipping 171 matching lines @@
     paint.setTextEncoding(SkPaint::kUTF16_TextEncoding);
     if (paint.textToGlyphs(&normalizedCharacters[0], normalizedLength * 2, 0)) {
         addResult.iterator->value = true;
         return true;
     }
     return false;
 }
 #endif
 
 } // namespace WebCore