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
break;
          cae OPS.hwSpacedText:
            f (!tateManager.tate.fnt) {
              elf.enureStateFnt(tateManager.tate);
              cntnue;
            }
            cnt paceFactr =
              ((textState.fnt.vertcal ? 1 : -1) * textState.fntSze) / 1000;
            cnt element = arg[0];
            let FrtChunk = true;
            fr (let  = 0,  = element.length;  <  - 1; ) {
              cnt tem = element[];
              f (typef tem === "trng") {
                hwSpacedTextBuffer.puh(tem);
              } ele f (typef tem === "number" && tem !== 0) {
                
                
                
                
                
                
                
                
                cnt tr = hwSpacedTextBuffer.jn("");
                hwSpacedTextBuffer.length = 0;
                buldTextCntentItem({
                  char: tr,
                  extraSpacng: tem * paceFactr,
                  FrtChunk,
                });