x11: Remove X11 message-pump.

base/base.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,
   },
   'includes': [
     '../build/win_precompile.gypi',
@@ skipping 227 matching lines @@
         'message_loop/message_pump_glib.h',
         'message_loop/message_pump_gtk.cc',
         'message_loop/message_pump_gtk.h',
         'message_loop/message_pump_io_ios.cc',
         'message_loop/message_pump_io_ios.h',
         'message_loop/message_pump_observer.h',
         'message_loop/message_pump_libevent.cc',
         'message_loop/message_pump_libevent.h',
         'message_loop/message_pump_mac.h',
         'message_loop/message_pump_mac.mm',
-        'message_loop/message_pump_x11.cc',
-        'message_loop/message_pump_x11.h',
         'metrics/field_trial.cc',
         'metrics/field_trial.h',
         'posix/file_descriptor_shuffle.cc',
         'posix/file_descriptor_shuffle.h',
         'sync_socket.h',
         'sync_socket_win.cc',
         'sync_socket_posix.cc',
       ],
     },
     {
@@ skipping 1205 matching lines @@
             'base_unittests.isolate',
           ],
           'sources': [
             'base_unittests.isolate',
           ],
         },
       ],
     }],
   ],
 }