x11: Make the event-source work with both glib and libevent message-pumps.

ui/events/events.gyp

 # Copyright 2013 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 136 matching lines @@
         'platform/platform_event_dispatcher.h',
         'platform/platform_event_observer.h',
         'platform/platform_event_source.cc',
         'platform/platform_event_source.h',
         'platform/platform_event_source_stub.cc',
         'platform/platform_event_types.h',
         'platform/scoped_event_dispatcher.cc',
         'platform/scoped_event_dispatcher.h',
         'platform/x11/x11_event_source.cc',
         'platform/x11/x11_event_source.h',
+        'platform/x11/x11_event_source_glib.cc',
+        'platform/x11/x11_event_source_libevent.cc',
         'win/events_win.cc',
         'x/events_x.cc',
         'linux/text_edit_command_auralinux.cc',
         'linux/text_edit_command_auralinux.h',
         'linux/text_edit_key_bindings_delegate_auralinux.cc',
         'linux/text_edit_key_bindings_delegate_auralinux.h',
       ],
       'conditions': [
         # We explicitly enumerate the platforms we _do_ provide native cracking
         # for here.
@@ skipping 16 matching lines @@
           ],
           'dependencies': [
             '../../build/linux/system.gyp:x11',
             '../gfx/gfx.gyp:gfx_x11',
           ],
         }],
         ['use_glib==1', {
           'dependencies': [
             '../../build/linux/system.gyp:glib',
           ],
+          'sources!': [
+            'platform/x11/x11_event_source_libevent.cc',
+          ],
+        }, {
+          # use_glib == 0
+          'sources!': [
+            'platform/x11/x11_event_source_glib.cc',
+          ],
         }],
         ['use_ozone_evdev==1', {
           'defines': ['USE_OZONE_EVDEV=1'],
         }],
         ['use_ozone_evdev==1 and use_udev==1', {
           'dependencies': [
             '<(DEPTH)/build/linux/system.gyp:udev',
           ],
         }],
         ['use_ozone_evdev==1 and use_evdev_gestures==1', {
@@ skipping 179 matching lines @@
           ],
           'variables': {
             'test_suite_name': 'events_unittests',
           },
           'includes': [ '../../build/apk_test.gypi' ],
         },
       ],
     }],
   ],
 }