Locally apply upstream patch to fix crbug.com/394373

src/autofit/aflatin.c

 /***************************************************************************/
 /*                                                                         */
 /*  aflatin.c                                                              */
 /*                                                                         */
 /*    Auto-fitter hinting routines for latin writing system (body).        */
 /*                                                                         */
 /*  Copyright 2003-2014 by                                                 */
 /*  David Turner, Robert Wilhelm, and Werner Lemberg.                      */
 /*                                                                         */
 /*  This file is part of the FreeType project, and may only be used,       */
@@ skipping 344 matching lines @@
         /* load the character in the face -- skip unknown or empty ones */
         af_get_char_index( &metrics->root, ch, &glyph_index, &y_offset );
         if ( glyph_index == 0 )
         {
           FT_TRACE5(( "  U+%04lX unavailable\n", ch ));
           continue;
         }
 
         error   = FT_Load_Glyph( face, glyph_index, FT_LOAD_NO_SCALE );
         outline = face->glyph->outline;
-        if ( error || outline.n_points <= 0 )
+        /* reject glyphs that don't produce any rendering */
+        if ( error || outline.n_points <= 2 )
         {
-          FT_TRACE5(( "  U+%04lX contains no outlines\n", ch ));
+          FT_TRACE5(( "  U+%04lX contains no (usable) outlines\n", ch ));
           continue;
         }
 
         /* now compute min or max point indices and coordinates */
         points             = outline.points;
         best_point         = -1;
         best_y             = 0;  /* make compiler happy */
         best_contour_first = 0;  /* ditto */
         best_contour_last  = 0;  /* ditto */
 
@@ skipping 2524 matching lines @@
     (AF_WritingSystem_InitMetricsFunc) af_latin_metrics_init,
     (AF_WritingSystem_ScaleMetricsFunc)af_latin_metrics_scale,
     (AF_WritingSystem_DoneMetricsFunc) NULL,
 
     (AF_WritingSystem_InitHintsFunc)   af_latin_hints_init,
     (AF_WritingSystem_ApplyHintsFunc)  af_latin_hints_apply
   )
 
 
 /* END */