rietveld code review upload.py patch to open issue in browser after upload

rietveld.upload.py.open_url.diff

--- codereview
+++ (clipboard)
@@ -1665,6 +1665,12 @@
     vcs.UploadBaseFiles(issue, rpc_server, patches, patchset, options, files)
     if options.send_mail:
       rpc_server.Send("/" + issue + "/mail", payload="")
+  
+  if response_body.startswith("Issue created.") or\
+  response_body.startswith("Issue updated."):
+    url = msg[msg.rfind("http"):]
+    os.system("open " + url)
+  
   return issue, patchset