Bug #38374 --> more updates for external helper application support. (NOT PART OF THE BUILD)

code review will come when this is done and gets turned on.

initialize an external app handler with an nsIFile which represents the app.

uriloader/exthandler/win/nsOSHelperAppService.cpp

@@ -58,6 +58,7 @@ NS_IMETHODIMP nsExternalHelperAppService::DoContent(const char *aMimeContentType
 
   // now bind the handler to the application we want to launch when we the handler is done
   // receiving all the data...
+  handler->Init(nsnull /* this should be a nsIFile that represents the app */);
 
   return NS_OK;