[SystemInfo API] Move Storage API out of experimental namespace and rename to the "system" namespace

chrome/test/data/extensions/api_test/system/storage_eject/test.js

 // Copyright 2013 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 attachedDeviceId;
 
-systemInfo = chrome.experimental.systemInfo;
-
 function testAttach(details) {
   attachedDeviceId = details.id;
   chrome.test.sendMessage('attach_test_ok,' + details.name);
 };
 
 function ejectCallback(result) {
   if (result == "success") {
     chrome.test.sendMessage("eject_ok");
   } else if (result == "in_use") {
     chrome.test.sendMessage("eject_in_use");
   } else if (result == "no_such_device") {
     chrome.test.sendMessage("eject_no_such_device");
   } else {
     chrome.test.sendMessage("eject_failure");
   }
 };
 
 function ejectTest() {
-  systemInfo.storage.ejectDevice(attachedDeviceId, ejectCallback);
+  chrome.system.storage.ejectDevice(attachedDeviceId, ejectCallback);
 };
 
 function addAttachListener() {
-  systemInfo.storage.onAttached.addListener(testAttach);
+  chrome.system.storage.onAttached.addListener(testAttach);
   chrome.test.sendMessage('add_attach_ok');
 };
 
 function removeAttachListener() {
-  systemInfo.storage.onAttached.removeListener(testAttach);
+  chrome.system.storage.onAttached.removeListener(testAttach);
   chrome.test.sendMessage('remove_attach_ok');
 };
 
 function ejectFailTest() {
-  systemInfo.storage.ejectDevice('-1', ejectCallback);
+  chrome.system.storage.ejectDevice('-1', ejectCallback);
 };