Add PlatformWindow/Event related code for Ozone X11.

ui/events/platform/x11/x11_events_platform.gyp

Index: ui/events/platform/x11/x11_events_platform.gyp
diff --git a/ui/events/platform/x11/x11_events_platform.gyp b/ui/events/platform/x11/x11_events_platform.gyp
index cb1bbcd39c04d5806fd82a91be4da2ca0fb60576..618098741d4cc0d489a8a477598b829ae67d93fd 100644
--- a/ui/events/platform/x11/x11_events_platform.gyp
+++ b/ui/events/platform/x11/x11_events_platform.gyp
@@ -20,6 +20,7 @@
       '../../devices/events_devices.gyp:events_devices',
       '../../events.gyp:events',
       '../../events.gyp:events_base',
+      '../../x/events_x.gyp:events_x',
       '../events_platform.gyp:events_platform',
     ],
     'sources': [
@@ -27,6 +28,8 @@
       'x11_event_source.h',
       'x11_event_source_glib.cc',
       'x11_event_source_libevent.cc',
+      'x11_event_source_linux.cc',
+      'x11_event_source_ozone.cc',
       'x11_hotplug_event_handler.cc',
       'x11_hotplug_event_handler.h',
     ],
@@ -37,11 +40,14 @@
         ],
         'sources!': [
           'x11_event_source_libevent.cc',
+          'x11_event_source_libevent.h',
+          'x11_event_source_ozone.cc',
         ],
       }, {
         # use_glib == 0
         'sources!': [
           'x11_event_source_glib.cc',
+          'x11_event_source_liunx.cc',
         ],
       }],
     ],