Delete and recreate the client plugin if WCS is reloaded.

remoting/webapp/session_connector.js

Index: remoting/webapp/session_connector.js
diff --git a/remoting/webapp/session_connector.js b/remoting/webapp/session_connector.js
index 86eff44973ff2bc36eada5ab96d9c0039c0309ef..c03a528581e79280e5e45574af77c62ee894e317 100644
--- a/remoting/webapp/session_connector.js
+++ b/remoting/webapp/session_connector.js
@@ -346,6 +346,14 @@ remoting.SessionConnector.prototype.createSessionIfReady_ = function() {
     return;
   }
 
+  // In some circumstances, the WCS <iframe> can get reloaded, which results

[Sergey Ulanov, 2013/06/20 02:41:53]

Would it be better to put this code in onWcsLoaded_()?

[Jamie, 2013/06/20 17:32:20]

Having it immediately before creating the new plugin makes the "only one plugin
at a time" guarantee explicit (if Javascript had dtors, I'd probably put the
removal code there). On the other hand, having it in onWcsLoaded_ better
expresses the "this function might be called more than once, so we'd better
reset to a sane state before continuing" idea. I prefer the former so unless you
feel strongly, I'll leave it as-is.

+  // in a new clientJid and a new callback. In this case, remove the old
+  // client plugin before instantiating a new one.
+  if (this.clientSession_) {
+    this.clientSession_.removePlugin();
+    this.clientSession_ = null;
+  }
+
   var securityTypes = 'third_party,spake2_pair,spake2_hmac,spake2_plain';
   this.clientSession_ = new remoting.ClientSession(
       this.hostJid_, this.clientJid_, this.hostPublicKey_, this.passPhrase_,