Move chrome.usb to //extensions

extensions/common/api/api.gyp

 # Copyright 2014 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': 'extensions_api',
       'type': 'static_library',
       'sources': [
@@ skipping 12 matching lines @@
         # TODO: Eliminate these on Android. See crbug.com/305852.
         'schema_files': [
           'dns.idl',
           'extensions_manifest_types.json',
           'socket.idl',
           'sockets_tcp.idl',
           'sockets_tcp_server.idl',
           'sockets_udp.idl',
           'storage.json',
           'test.json',
+          'usb.idl',
         ],
         'cc_dir': 'extensions/common/api',
         'root_namespace': 'extensions::core_api',
         'impl_dir': 'extensions/browser/api',
       },
       'dependencies': [
         '<(DEPTH)/skia/skia.gyp:skia',
       ],
     },
   ],
 }