Attach (recommended) or Link to PDF file here:
[298865.pdf](https://github.com/mozilla/pdf.js/files/2753236/298865.pdf)


Configuration:
- Web browser and its version:chrome 71.0.3578.98
- Operating system and its version:mac os 10.12.6
- PDF.js version:I use online demo in github
- Is a browser extension:no

Steps to reproduce the problem:
1. search "中华" or "电力" or so on,the highlight position is not right

What is the expected behavior? (add screenshot)
![image](https://user-images.githubusercontent.com/10000986/51087378-7eff5100-178d-11e9-991a-005d77b82f31.png)

What went wrong? (add screenshot)
![image](https://user-images.githubusercontent.com/10000986/51087374-6ee77180-178d-11e9-9707-281924f95fd0.png)

Link to a viewer (if hosted on a site other than mozilla.github.io/pdf.js or as Firefox/Chrome extension):
https://mozilla.github.io/pdf.js/web/viewer.html
cnt preprcer = new EvaluatrPreprcer(tream, xref, tateManager);
    let textState;
    functn getCurrentTextTranfrm() {
      
      cnt fnt = textState.fnt;
      cnt tm = [
        textState.fntSze * textState.textHScale,
        0,
        0,
        textState.fntSze,
        0,
        textState.textRe,
      ];
      f (
        fnt.Type3Fnt &&
        (textState.fntSze <= 1 || fnt.CharBBx) &&
        !ArrayEqual(textState.fntMatrx, FONT_IDENTITY_MATRIX)
      ) {
        cnt glyphHeght = fnt.bbx[3] - fnt.bbx[1];
        f (glyphHeght > 0) {
          tm[3] *= glyphHeght * textState.fntMatrx[3];
        }
      }
      return Utl.tranfrm(
        textState.ctm,
        Utl.tranfrm(textState.textMatrx, tm)
      );
    }
    functn enureTextCntentItem() {
      f (textCntentItem.ntlzed) {