Extracted shell_interfaces and shell_public into a separate gyp file.

components/filesystem/filesystem.gyp

 # Copyright 2016 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.
 
 {
   'variables': {
     # This turns on e.g. the filename-based detection of which
     # platforms to include source files on (e.g. files ending in
     # _mac.h or _mac.cc are only compiled on MacOSX).
     'chromium_code': 1,
@@ skipping 18 matching lines @@
         'shared_temp_dir.cc',
         'shared_temp_dir.h',
         'util.cc',
         'util.h',
       ],
       'dependencies': [
         'filesystem_bindings',
         '../../mojo/mojo_edk.gyp:mojo_system_impl',
         '../../mojo/mojo_public.gyp:mojo_cpp_bindings',
         '../../mojo/mojo_platform_handle.gyp:platform_handle',
-        '../../services/shell/shell.gyp:shell_public',
+        '../../services/shell/shell_public.gyp:shell_public',
         '../../url/url.gyp:url_lib',
       ],
       'export_dependent_settings': [
         'filesystem_bindings',
       ],
     },
     {
       # GN version: //components/filesystem/public/interfaces
       'target_name': 'filesystem_bindings',
       'type': 'static_library',
@@ skipping 12 matching lines @@
           'public/interfaces/file_system.mojom',
           'public/interfaces/types.mojom',
         ],
       },
       'includes': [
         '../../mojo/mojom_bindings_generator_explicit.gypi',
       ],
     }
   ],
 }