Move the tts and ttsEngine APIs out of experimental, and give

chrome/test/data/extensions/api_test/tts_engine/register_engine/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.
 
 // TTS api test for Chrome on ChromeOS.
 // browser_tests.exe --gtest_filter="TtsApiTest.*"
 
-if (!chrome.tts) {
-  chrome.tts = chrome.experimental.tts;
-}
-
-if (!chrome.ttsEngine) {
-  chrome.ttsEngine = chrome.experimental.ttsEngine;
-}
-
 chrome.test.runTests([
   function testNoListeners() {
     // This call should go to native speech because we haven't registered
     // any listeners.
     chrome.tts.speak(
         'native speech',
         {
          'onEvent': function(event) {
            if (event.type == 'end') {
              chrome.test.succeed();
@@ skipping 135 matching lines @@
       chrome.test.assertEq('Alice', voices[1].voiceName);
       chrome.test.assertEq('en-US', voices[1].lang);
       chrome.test.assertEq('female', voices[1].gender);
 
       chrome.test.assertEq('Pat', voices[2].voiceName);
       chrome.test.assertEq('en-US', voices[2].lang);
       chrome.test.succeed();
     });
   }
 ]);