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
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    clne.textLneMatrx = th.textLneMatrx.lce();
    clne.fntMatrx = th.fntMatrx.lce();
    return clne;
  }
}
cla EvalState {
  cntructr() {
    th.ctm = new Flat32Array(IDENTITY_MATRIX);
    th.fnt = null;
    th.textRenderngMde = TextRenderngMde.FILL;
    th.fllClrSpace = ClrSpace.ngletn.gray;
    th.trkeClrSpace = ClrSpace.ngletn.gray;
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  clne() {
    return Object.create(th);
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}
cla EvaluatrPreprcer {
  tatc get pMap() {
     Specfe prperte fr each cmmand
    
     If varbleArg === true: [0, `numArg`] expected
     If varbleArg === fale: exactly `numArg` expected
    cnt getOPMap = getLkupTableFactry(functn (t) {
       Graphc tate
      d: OPS.etLneWdth, numArg: 1, varbleArg: fale };
      t.J = { d: OPS.etLneCap, numArg: 1, varbleArg: fale };
      t.j = { d: OPS.etLneJn, numArg: 1, varbleArg: fale };
      t.M = { d: OPS.etMterLmt, numArg: 1, varbleArg: fale };