extensions: Remove chrome.webSocketProxyPrivate API

chrome/test/data/extensions/api_test/web_socket_proxy_private/background.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 hostname = '127.0.0.1';
-var port = -1;
-
-function testModernApi() {
-  function gotMessage(msg) {
-    chrome.test.assertEq(msg.data, window.btoa("aloha\n"));
-  }
-
-  function gotUrl(url) {
-    var url_regex = /^ws:\/\//
-    chrome.test.assertEq(0, url.search(url_regex));
-    ws = new WebSocket(url);
-
-    function gotMessage(msg) {
-      // chrome.test.callbackPass envelope works only once, remove it.
-      ws.onmessage = gotMessage;
-    }
-
-    // We should get response from HTTP test server.
-    ws.onmessage = chrome.test.callbackPass(gotMessage);
-
-    ws.onopen = function() {
-      var request = ["GET / HTTP/1.1",
-                     "Host: 127.0.0.1:" + port,
-                     "Connection: keep-alive",
-                     "User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/535.2 (KHTML, like Gecko) Chrome/15.0.874.54 Safari/535.2",
-                     "Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8",
-                     "", ""].join("\r\n");
-      ws.send(window.btoa(request));
-    };
-  }
-
-  chrome.webSocketProxyPrivate.getURLForTCP(
-      hostname, port, { "tls": false }, chrome.test.callbackPass(gotUrl));
-}
-
-function testObsoleteApi() {
-  function gotPassport(passport) {
-    chrome.test.assertEq('string', typeof(passport));
-    chrome.test.assertTrue(passport.length > 5);  // Short one is insecure.
-  }
-
-  chrome.webSocketProxyPrivate.getPassportForTCP(
-      hostname, port, chrome.test.callbackPass(gotPassport));
-}
-
-function setTestServerPortAndProceed(testConfig) {
-  port = testConfig.testServer.port;
-  chrome.test.runTests([testModernApi, testObsoleteApi]);
-}
-
-chrome.test.getConfig(setTestServerPortAndProceed);