Make GTK and Aura parts orthogonal to OS parts

content/content_browser.gypi

 # Copyright (c) 2011 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.
 
 {
   'dependencies': [
     '../crypto/crypto.gyp:crypto',
     '../net/net.gyp:net',
     '../net/net.gyp:http_server',
     '../ppapi/ppapi_internal.gyp:ppapi_proxy',
@@ skipping 546 matching lines @@
     'browser/worker_host/worker_message_filter.cc',
     'browser/worker_host/worker_message_filter.h',
     'browser/worker_host/worker_process_host.cc',
     'browser/worker_host/worker_process_host.h',
     'browser/worker_host/worker_service.cc',
     'browser/worker_host/worker_service.h',
     'browser/worker_host/worker_service_observer.h',
     'browser/zygote_host_linux.cc',
     'browser/zygote_host_linux.h',
     'browser/zygote_main_linux.cc',
+    'public/browser/browser_main_parts.h',
     'public/browser/content_browser_client.h',
     'public/browser/native_web_keyboard_event.h',
     'public/browser/navigation_types.h',
     'public/browser/notification_details.h',
     'public/browser/notification_observer.h',
     'public/browser/notification_registrar.cc',
     'public/browser/notification_registrar.h',
     'public/browser/notification_service.h',
     'public/browser/notification_source.h',
     'public/browser/notification_types.h',
@@ skipping 136 matching lines @@
       ],
     }, {
       'sources/': [
         ['exclude', '^browser/renderer_host/accelerated_surface_container_linux.cc'],
         ['exclude', '^browser/renderer_host/accelerated_surface_container_linux.h'],
       ],
    }],
  ],
 }