Extract SandboxIPCProcess into its own file.

content/content_browser.gypi

 # 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.
 
 {
   'dependencies': [
     '../base/base.gyp:base_static',
     '../crypto/crypto.gyp:crypto',
     '../google_apis/google_apis.gyp:google_apis',
     '../net/net.gyp:net',
@@ skipping 1059 matching lines @@
     'browser/renderer_host/pepper/ssl_context_helper.h',
     'browser/renderer_host/popup_menu_helper_mac.h',
     'browser/renderer_host/popup_menu_helper_mac.mm',
     'browser/renderer_host/render_message_filter.cc',
     'browser/renderer_host/render_message_filter.h',
     'browser/renderer_host/render_process_host_impl.cc',
     'browser/renderer_host/render_process_host_impl.h',
     'browser/renderer_host/render_process_host_mojo_impl.cc',
     'browser/renderer_host/render_process_host_mojo_impl.h',
     'browser/renderer_host/render_sandbox_host_linux.cc',
+    'browser/renderer_host/render_sandbox_host_linux.h',
     'browser/renderer_host/render_process_host_impl.h',
     'browser/renderer_host/render_view_host_delegate.cc',
     'browser/renderer_host/render_view_host_delegate.h',
     'browser/renderer_host/render_view_host_factory.cc',
     'browser/renderer_host/render_view_host_factory.h',
     'browser/renderer_host/render_view_host_impl.cc',
     'browser/renderer_host/render_view_host_impl.h',
     'browser/renderer_host/render_widget_helper.cc',
     'browser/renderer_host/render_widget_helper.h',
     'browser/renderer_host/render_widget_host_delegate.cc',
     'browser/renderer_host/render_widget_host_delegate.h',
     'browser/renderer_host/render_widget_host_impl.cc',
     'browser/renderer_host/render_widget_host_impl.h',
     'browser/renderer_host/render_widget_host_view_android.cc',
     'browser/renderer_host/render_widget_host_view_android.h',
     'browser/renderer_host/render_widget_host_view_aura.cc',
     'browser/renderer_host/render_widget_host_view_aura.h',
     'browser/renderer_host/render_widget_host_view_base.cc',
     'browser/renderer_host/render_widget_host_view_base.h',
     'browser/renderer_host/render_widget_host_view_mac_dictionary_helper.h',
     'browser/renderer_host/render_widget_host_view_mac_dictionary_helper.mm',
     'browser/renderer_host/render_widget_host_view_mac_editcommand_helper.h',
     'browser/renderer_host/render_widget_host_view_mac_editcommand_helper.mm',
     'browser/renderer_host/render_widget_host_view_mac.h',
     'browser/renderer_host/render_widget_host_view_mac.mm',
     'browser/renderer_host/renderer_frame_manager.cc',
     'browser/renderer_host/renderer_frame_manager.h',
+    'browser/renderer_host/sandbox_ipc_linux.cc',
+    'browser/renderer_host/sandbox_ipc_linux.h',
     'browser/renderer_host/software_frame_manager.cc',
     'browser/renderer_host/software_frame_manager.h',
     'browser/renderer_host/socket_stream_dispatcher_host.cc',
     'browser/renderer_host/socket_stream_dispatcher_host.h',
     'browser/renderer_host/socket_stream_host.cc',
     'browser/renderer_host/socket_stream_host.h',
     'browser/renderer_host/text_input_client_mac.h',
     'browser/renderer_host/text_input_client_mac.mm',
     'browser/renderer_host/text_input_client_message_filter.h',
     'browser/renderer_host/text_input_client_message_filter.mm',
@@ skipping 596 matching lines @@
         '../build/linux/system.gyp:dbus',
         '../dbus/dbus.gyp:dbus',
       ],
     }, {  # OS != "linux" or use_dbus==0
       'sources!': [
         'browser/geolocation/wifi_data_provider_linux.cc',
       ],
     }],
   ],
 }