Move serial out of experimental.

chrome/test/data/extensions/api_test/serial/real_hardware/background.js

 // Copyright (c) 2012 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.
 
 // TODO(miket): opening Bluetooth ports on OSX is unreliable. Investigate.
 function shouldSkipPort(portName) {
   return portName.match(/[Bb]luetooth/);
 }
 
 var testGetPorts = function() {
   var onGetPorts = function(ports) {
     // Any length is potentially valid, because we're on unknown hardware. But
     // we are testing at least that the ports member was filled in, so it's
     // still a somewhat meaningful test.
     chrome.test.assertTrue(ports.length >= 0);
     chrome.test.succeed();
   }
 
-  chrome.experimental.serial.getPorts(onGetPorts);
+  chrome.serial.getPorts(onGetPorts);
 };
 
 var testMaybeOpenPort = function() {
   var onGetPorts = function(ports) {
     // We're testing as much as we can here without actually assuming the
     // existence of attached hardware.
     //
     // TODO(miket): is there any chance that just opening a serial port but not
     // doing anything could be harmful to devices attached to a developer's
     // machine?
     if (ports.length > 0) {
       var currentPort = 0;
 
       var onFinishedWithPort = function() {
         if (currentPort >= ports.length)
           chrome.test.succeed();
         else
           testPort();
       };
 
       var onClose = function(r) {
         onFinishedWithPort();
       };
 
       var onOpen = function(connectionInfo) {
         var id = connectionInfo.connectionId;
         if (id > 0)
-          chrome.experimental.serial.close(id, onClose);
+          chrome.serial.close(id, onClose);
         else
           onFinishedWithPort();
       };
 
       var testPort = function() {
         var port = ports[currentPort++];
 
         if (shouldSkipPort(port)) {
           onFinishedWithPort();
         } else {
           console.log("Opening serial device " + port);
-          chrome.experimental.serial.open(port, onOpen);
+          chrome.serial.open(port, onOpen);
         }
       }
 
       testPort();
     } else {
       // There aren't any valid ports on this machine. That's OK.
       chrome.test.succeed();
     }
   }
 
-  chrome.experimental.serial.getPorts(onGetPorts);
+  chrome.serial.getPorts(onGetPorts);
 };
 
 var tests = [testGetPorts, testMaybeOpenPort];
 chrome.test.runTests(tests);