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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                  etyXObjectCache.et(name, xbj.dct.bjId, true);
                  relveXObject();
                  return;
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                cnt currentState = tateManager.tate.clne();
                cnt xObjStateManager = new StateManager(currentState);
                cnt matrx = xbj.dct.getArray("Matrx");
                f (Array.Array(matrx) && matrx.length === 6) {
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                  enqueueInvked: fale,
                  enqueue(chunk, ze) {