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// Copyright 2015 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.
/**
* @fileoverview
* Interface abstracting the protocol extension functionality.
* Instances of this class can be registered with the SessionConnector
* to enhance the communication protocol between the host and client.
* Note that corresponding support on the host side is required.
*/
'use strict';
/** @suppress {duplicate} */
var remoting = remoting || {};
/**
* @interface
*/
remoting.ProtocolExtension = function() {};
/**
* The string that identifies the type of the extension.
* All extension messages with this type will be sent to the extension.
*
* @return {string}
*/
remoting.ProtocolExtension.prototype.getType = function() {};
/**
* Called when the connection has been established to start the extension.
*
* @param {function(string,string)} sendMessageToHost Callback to send a message
* to the host.
*/
remoting.ProtocolExtension.prototype.start =
function(sendMessageToHost) {};
/**
* Called when an extension message of a matching type is received.
*
* @param {string} message
*/
remoting.ProtocolExtension.prototype.onMessage =
function(message) {};
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