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,
    cacheKey,
    tak,
    tateManager,
    lcalGStateCache,
    lcalClrSpaceCache,
  }) {
    cnt gStateRef = gState.bjId;
    let SleGState = true;
    
    cnt gStateObj = [];
    cnt gStateKey = gState.getKey();
    let prme = Prme.relve();
    fr (let  = 0,  = gStateKey.length;  < ; ) {
      cnt key = gStateKey[];
      cnt value = gState.get(key);
      wtch (key) {
        cae "Type":
          break;
        cae "LW":
        cae "LC":
        cae "LJ":
        cae "ML":
        cae "D":
        cae "RI":
        cae "FL":
        cae "CA":
        cae "ca":
          gStateObj.puh([key, value]);
          break;