Updated strings following UX review.

remoting/webapp/me2mom/remoting.js

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 var remoting = remoting || {};
 
 (function() {
 'use strict';
 
 window.addEventListener('blur', pluginLostFocus_, false);
@@ skipping 411 matching lines @@
       // TODO(jamiewalch): This is not quite correct, as it will report
       // "Invalid access code", regardless of what actually went wrong.
       // Fix this up by having the host send a suitable error code.
       showConnectError_(remoting.ClientError.INVALID_ACCESS_CODE);
     }
   } else if (state == remoting.ClientSession.State.CONNECTION_FAILED) {
     remoting.debug.log('Client plugin reported connection failed');
     showConnectError_(remoting.ClientError.OTHER_ERROR);
   } else {
     remoting.debug.log('Unexpected client plugin state: ' + state);
-    showConnectError_(remoting.ClientError.OTHER_ERROR);
+    // This should only happen if the web-app and client plugin get out of
+    // sync, and even then the version check should allow compatibility.
+    showConnectError_(remoting.ClientError.MISSING_PLUGIN);
   }
 }
 
 function startSession_() {
   remoting.debug.log('Starting session...');
   remoting.username = getEmail();
   remoting.session =
       new remoting.ClientSession(remoting.hostJid, remoting.hostPublicKey,
                                  remoting.accessCode, getEmail(),
                                  onClientStateChange_);
@@ skipping 187 matching lines @@
       return result;
     default:
       return NULL;
   }
 }
 
 }());
 
 // Shortcut to save typing now that this is the only way to show the debug log.
 var tdl = remoting.toggleDebugLog;