PDF.js and Generic Demo Viewer broken on MSEdge

[tonyjin]

Repro steps: Visit https://mozilla.github.io/pdf.js/web/viewer.html on MSEdge (I used the modern.ie VM found here - https://dev.windows.com/en-us/microsoft-edge/tools/vms/mac/)

Screenshot: http://screencast.com/t/CAbhhD5TGIs

Issue seems to be specific to MSEdge.

[priyajeet]

Issue in PDF.js
http://i.imgur.com/tQlxvGI.png

'origin' in URL.prototype (which is undefined in Edge)

pdf.js/src/shared/util.js

Line 1700 in 58329f7

if (typeof URL === 'function' && ('origin' in URL.prototype)) {

caused by e362c3b