Here, i have attached the PDF, that PDF document contains "Nudi" as an embedded font. When i searching the particular word (that in Nudi font), the search result selecting the word that context next to the exact word.

Link to PDF file (or attach file here):
[sample_pdf.zip](https://github.com/mozilla/pdf.js/files/229582/sample_pdf.zip)

Configuration:
- Web browser and its version: Mozilla 45.0.2
- Operating system and its version: Windows 7
- PDF.js version: 1.4.20-disc

What is the expected behavior? (add screenshot)
![find_01](https://cloud.githubusercontent.com/assets/17423938/14704922/c2e67f2c-07d4-11e6-9320-9aed2578d377.png)

});
    div.addEventListener("mouseup", () => {
      if (this.enhanceTextSelection && this.textLayerRenderTask) {
        if (typeof PDFJSDev === "undefined" || !PDFJSDev.test("MOZCENTRAL")) {
          expandDivsTimer = setTimeout(() => {
            if (this.textLayerRenderTask) {
              this.textLayerRenderTask.expandTextDivs(false);
            }
            expandDivsTimer = null;
          }, EXPAND_DIVS_TIMEOUT);
        } else {
          this.textLayerRenderTask.expandTextDivs(false);
        }
        return;
      }
      const end = div.querySelector(".endOfContent");
      if (!end) {
        return;
      }
      if (typeof PDFJSDev === "undefined" || !PDFJSDev.test("MOZCENTRAL")) {
        end.style.top = "";
      }
      end.classList.remove("active");
    });
  }
}
/**
 * @implements IPDFTextLayerFactory
 */
class DefaultTextLayerFactory {