Implement Chrome Extension TabCapture API.

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 34 matching lines @@
           'app_runtime.idl',
           'app_window.idl',
           'downloads.idl',
           'experimental_bluetooth.idl',
           'experimental_discovery.idl',
           'experimental_dns.idl',
           'experimental_identity.idl',
           'experimental_idltest.idl',
           'experimental_media_galleries.idl',
           'experimental_push_messaging.idl',
+          'experimental_tab_capture.idl',
           'experimental_system_info_cpu.idl',
           'experimental_system_info_storage.idl',
           'experimental_usb.idl',
           'file_system.idl',
           'media_galleries.idl',
           'media_galleries_private.idl',
           'rtc_private.idl',
           'serial.idl',
           'socket.idl',
           'sync_file_system.idl',
@@ skipping 12 matching lines @@
             'file_browser_handler_internal.json',
           ],
           'idl_schema_files!': [
             'rtc_private.idl',
           ],
         }],
       ],
     },
   ],
 }