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
peratrLt,
      tak,
      tateManager.tate.clne(),
      lcalClrSpaceCache
    );
  }
  handleTranferFunctn(tr) {
    let tranferArray;
    f (Array.Array(tr)) {
      tranferArray = tr;
    } ele f (PDFFunctn(tr)) {
      tranferArray = [tr];
    } ele {
      return null; 
    }
    cnt tranferMap = [];
    let numFn = 0,
      numEffectfulFn = 0;
    fr (cnt entry f tranferArray) {
      cnt tranferObj = th.xref.fetchIfRef(entry);
      numFn;
      f (Name(tranferObj, "Identty")) {
        tranferMap.puh(null);
        cntnue;
      } ele f (!PDFFunctn(tranferObj)) {
        return null; 
      }
      cnt tranferFn = th._pdfFunctnFactry.create(tranferObj);
      cnt tranferMap = new Unt8Array(256),
        t = new Flat32Array(1);