Report UseCounter metric when observing NotDef glyphs

third_party/WebKit/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 62 matching lines @@
   struct RangeData;
 
   // Shapes a single seqment, as identified by the RunSegmenterRange parameter,
   // one or more times taking font fallback into account. The start and end
   // parameters are for the entire text run, not the segment, and are used to
   // determine pre- and post-context for shaping.
   void ShapeSegment(RangeData*,
                     RunSegmenter::RunSegmenterRange,
                     ShapeResult*) const;
 
-  bool ExtractShapeResults(RangeData*,
+  void ExtractShapeResults(RangeData*,
                            bool& font_cycle_queued,
                            const HolesQueueItem&,
                            const SimpleFontData*,
                            UScriptCode,
                            bool is_last_resort,
                            ShapeResult*) const;
 
   bool CollectFallbackHintChars(const Deque<HolesQueueItem>&,
                                 Vector<UChar32>& hint) const;
 
   const UChar* text_;
   unsigned text_length_;
 };
 
 }  // namespace blink
 
 #endif  // HarfBuzzShaper_h