Implement support for QUIC proxies in ProxyServer

chrome/test/data/extensions/api_test/proxy/individual/test.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.
 
 // proxy api test
 // browser_tests.exe --gtest_filter=ProxySettingsApiTest.ProxyFixedIndividual
 
 function expect(expected, message) {
   return chrome.test.callbackPass(function(value) {
     chrome.test.assertEq(expected, value, message);
   });
 }
 
 var httpProxy = {
+  scheme: "quic",
   host: "1.1.1.1"
 };
 var httpProxyExpected = {
-  scheme: "http",
+  scheme: "quic",
   host: "1.1.1.1",
-  port: 80
+  port: 443
 };
 var httpsProxy = {
   host: "2.2.2.2"
 };
 var httpsProxyExpected = {
   scheme: "http",
   host: "2.2.2.2",
   port: 80
 };
 var ftpProxy = {
@@ skipping 48 matching lines @@
   },
   function verifyIncognito() {
     chrome.proxy.settings.get(
         {'incognito': true},
         expect({ 'value': configExpected,
                  'incognitoSpecific': false,
                  'levelOfControl': "controlled_by_this_extension" },
                "invalid proxy settings"));
    }
 ]);