Attach (recommended) or Link to PDF file here:
[双引号不正常.pdf](https://github.com/mozilla/pdf.js/files/3533108/default.pdf)


Configuration:
- Web browser and its version:  IE11 , chrome 
- Operating system and its version:  win7
- PDF.js version:  master
- Is a browser extension: nothing 
teps to reproduce the problem:
1. viewer.html web  online preview


What is the expected behavior? (add screenshot)
Displayed in normal characters.

What went wrong? (add screenshot)
![20190823143813](https://user-images.githubusercontent.com/6269307/63571860-062e6600-c5b4-11e9-9fff-75d65cf6bade.png)

Not only the two characters I took screenshots, but also a lot of garbled Chinese punctuation. For example, the Chinese 《》 symbol. But these garbled characters only appear in some specific very old pdf files.

Link to a viewer (if hosted on a site other than mozilla.github.io/pdf.js or as Firefox/Chrome extension):nothing 

const isNarrow = name.search(/Narrow/g) !== -1;
    
    this.remeasure =
      (!isStandardFont || isNarrow) && Object.keys(this.widths).length > 0;
    if (
      (isStandardFont || isMappedToStandardFont) &&
      type === "CIDFontType2" &&
      this.cidEncoding.startsWith("Identity-")
    ) {
      const GlyphMapForStandardFonts = getGlyphMapForStandardFonts(),
        cidToGidMap = properties.cidToGidMap;
      
      
      const map = [];
      for (const charCode in GlyphMapForStandardFonts) {
        map[+charCode] = GlyphMapForStandardFonts[charCode];
      }
      if (/Arial-?Black/i.test(name)) {
        const SupplementalGlyphMapForArialBlack =
          getSupplementalGlyphMapForArialBlack();
        for (const charCode in SupplementalGlyphMapForArialBlack) {
          map[+charCode] = SupplementalGlyphMapForArialBlack[charCode];
        }
      } else if (/Calibri/i.test(name)) {
        const SupplementalGlyphMapForCalibri =
          getSupplementalGlyphMapForCalibri();
        for (const charCode in SupplementalGlyphMapForCalibri) {
          map[+charCode] = SupplementalGlyphMapForCalibri[charCode];