SkPDF: Stop using kHAdvance_PerGlyphInfo

src/core/SkAdvancedTypefaceMetrics.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #include "SkAdvancedTypefaceMetrics.h"
 #include "SkTypes.h"
@@ skipping 164 matching lines @@
             repeatedAdvances = 0;
             wildCardsInRun = trailingWildCards;
             trailingWildCards = 0;
         }
         curRange.fAdvance.append(1, &advance);
         if (advance != kDontCareAdvance) {
             lastAdvance = advance;
         }
     }
     if (curRange.fStartId == lastIndex) {
-        SkASSERT(prevRange);
         if (!prevRange) {
             fGlyphWidths.reset();
             return;  // https://crbug.com/567031
         }
     } else {
         FinishRange(&curRange, lastIndex - 1, WidthRange::kRange);
         fGlyphWidths.emplace_back(std::move(curRange));
     }
 }