RFR: 8214856 : Errors with JSZip in web console after upgrade to 3.1.5

[Priya Lakshmi Muthuswamy]

Hi,

Kindly review the fix for https://bugs.openjdk.java.net/browse/JDK-8214856
webrev: http://cr.openjdk.java.net/~pmuthuswamy/8214856/webrev.00/

In JSZip 3.x few api's have changed. Made the changes according to the 
JSZip upgrade 
guidelines(https://stuk.github.io/jszip/documentation/upgrade_guide.html).

Thanks,
Priya