Remove some unused files in libgtk2ui

chrome/browser/ui/libgtk2ui/libgtk2ui.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.
 
 {
   'variables': {
     'chromium_code': 1,
   },
   'targets': [
     {
@@ skipping 40 matching lines @@
       'sources': [
         # Note: sources list duplicated in GN build.
         'app_indicator_icon.cc',
         'app_indicator_icon.h',
         'app_indicator_icon_menu.cc',
         'app_indicator_icon_menu.h',
         'chrome_gtk_frame.cc',
         'chrome_gtk_frame.h',
         'chrome_gtk_menu_subclasses.cc',
         'chrome_gtk_menu_subclasses.h',
-        'g_object_destructor_filo.cc',
-        'g_object_destructor_filo.h',
         'gconf_listener.cc',
         'gconf_listener.h',
         'gtk2_event_loop.cc',
         'gtk2_event_loop.h',
         'gtk2_key_bindings_handler.cc',
         'gtk2_key_bindings_handler.h',
-        'gtk2_signal_registrar.cc',
-        'gtk2_signal_registrar.h',
         'gtk2_status_icon.cc',
         'gtk2_status_icon.h',
         'gtk2_ui.cc',
         'gtk2_ui.h',
         'gtk2_util.cc',
         'gtk2_util.h',
         'libgtk2ui_export.h',
         'menu_util.cc',
         'menu_util.h',
         'native_theme_gtk2.cc',
@@ skipping 38 matching lines @@
             '-Wno-unused-function',
 
             # G_STATIC_ASSERT uses a typedef as a static_assert.
             '-Wno-unused-local-typedef',
           ],
         }],
       ],
     },
   ],
 }