Migrate to cleaner InputStream and OutputStream with Reader wrappers.

guacamole/src/main/webapp/scripts/client-ui.js

@@ -815,9 +815,7 @@ GuacUI.Client.attach = function(guac) {
 
     }
 
-    guac.onfile = function(mimetype, filename) {
-
-        var stream = new Guacamole.BlobInputStream(mimetype);
+    guac.onfile = function(stream, mimetype, filename) {
 
         var download = new GuacUI.Download(filename);
         download.updateProgress(getSizeString(0));
@@ -845,8 +843,6 @@ GuacUI.Client.attach = function(guac) {
             GuacUI.Client.notification_area.removeChild(download.getElement());
         };
 
-        return stream;
-
     };
 
     /*