Move Proxy Settings API out of experimental

chrome/test/data/extensions/api_test/proxy/direct/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.ProxyDirectSettings
 
 function expect(expected, message) {
   return chrome.test.callbackPass(function(value) {
     chrome.test.assertEq(expected, value, message);
   });
 }
 
 var config = {
   mode: "direct",
 };
 
 chrome.test.runTests([
   // Verify that execution has started to make sure flaky timeouts are not
   // caused by us.
   function verifyTestsHaveStarted() {
     chrome.test.succeed();
   },
   function setAutoSettings() {
-    chrome.experimental.proxy.settings.set(
+    chrome.proxy.settings.set(
         {'value': config},
         chrome.test.callbackPass());
   },
   function verifyRegular() {
-    chrome.experimental.proxy.settings.get(
+    chrome.proxy.settings.get(
         {'incognito': false},
         expect({ 'value': config,
                  'levelOfControl': "ControlledByThisExtension" },
                "invalid proxy settings"));
   },
   function verifyIncognito() {
-    chrome.experimental.proxy.settings.get(
+    chrome.proxy.settings.get(
         {'incognito': true},
         expect({ 'value': config,
                  'incognitoSpecific': false,
                  'levelOfControl': "ControlledByThisExtension" },
                "invalid proxy settings"));
   }
 ]);