api/getDocument : handle ArrayBuffer check for PDF binary data (byteLength)

src/display/api.js

@@ -295,6 +295,8 @@ PDFJS.getDocument = function getDocument(src,
       } else if (typeof pdfBytes === 'object' && pdfBytes !== null &&
                  !isNaN(pdfBytes.length)) {
         params[key] = new Uint8Array(pdfBytes);
+      } else if (isArrayBuffer(pdfBytes)) {
+        params[key] = new Uint8Array(pdfBytes);
       } else {
         error('Invalid PDF binary data: either typed array, string or ' +
               'array-like object is expected in the data property.');