Implement exponential backoff for failed Me2Me authentication attempts

remoting/client/plugin/chromoting_instance.h

 // Copyright (c) 2012 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.
 
 // TODO(ajwong): We need to come up with a better description of the
 // responsibilities for each thread.
 
 #ifndef REMOTING_CLIENT_PLUGIN_CHROMOTING_INSTANCE_H_
 #define REMOTING_CLIENT_PLUGIN_CHROMOTING_INSTANCE_H_
 
@@ skipping 63 matching lines @@
   };
 
   // These values are duplicated in the JS code. Remember to update
   // both copies when making changes.
   enum ConnectionError {
     ERROR_NONE = 0,
     ERROR_HOST_IS_OFFLINE,
     ERROR_SESSION_REJECTED,
     ERROR_INCOMPATIBLE_PROTOCOL,
     ERROR_NETWORK_FAILURE,
+    ERROR_HOST_IS_DISABLED,
   };
 
   // Plugin API version. This should be incremented whenever the API
   // interface changes.
   static const int kApiVersion = 5;
 
   // Backward-compatibility version used by for the messaging
   // interface. Should be updated whenever we remove support for
   // an older version of the API.
   static const int kApiMinMessagingVersion = 5;
@@ skipping 100 matching lines @@
   pp::Var instance_object_;
 
   scoped_ptr<ScopedThreadProxy> thread_proxy_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromotingInstance);
 };
 
 }  // namespace remoting
 
 #endif  // REMOTING_CLIENT_PLUGIN_CHROMOTING_INSTANCE_H_