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

chrome/common/extensions/api/api.gyp

 # 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.
 
 {
   'targets': [
     {
       'target_name': 'api',
       'type': 'static_library',
       'sources': [
@@ skipping 76 matching lines @@
           'rtc_private.idl',
           'runtime.json',
           'serial.idl',
           'session_restore.json',
           'socket.idl',
           'storage.json',
           'sync_file_system.idl',
           'system_indicator.idl',
           'system_info_cpu.idl',
           'system_info_display.idl',
+          'system_info_storage.idl',
           'system_private.json',
           'tab_capture.idl',
           'tabs.json',
           'terminal_private.json',
           'test.json',
           'top_sites.json',
           'usb.idl',
           'wallpaper_private.json',
           'web_navigation.json',
           'web_request.json',
@@ skipping 17 matching lines @@
         ['OS!="chromeos"', {
           'schema_files!': [
             'file_browser_handler_internal.json',
             'rtc_private.idl',
           ],
         }],
       ],
     },
   ],
 }