Remove glib from the mojo build.

ui/events/platform/BUILD.gn

 # Copyright 2014 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.
 
 import("//build/config/ui.gni")
 
 component("platform") {
   sources = [
     # Allow this target to include events_export.h without depending on the
     # events target (which would be circular).
@@ skipping 31 matching lines @@
       "x11/hotplug_event_handler_x11.h",
       "x11/keyboard_code_conversion_x11.cc",
       "x11/keyboard_code_conversion_x11.h",
       "x11/keysym_to_unicode.cc",
       "x11/keysym_to_unicode.h",
       "x11/platform_event_utils_x11.cc",
       "x11/touch_factory_x11.cc",
       "x11/touch_factory_x11.h",
       "x11/x11_event_source.cc",
       "x11/x11_event_source.h",
-      "x11/x11_event_source_glib.cc",
       "x11/x11_event_source_libevent.cc",
     ]
 
-    if (is_linux) {
-      sources -= [ "x11/x11_event_source_libevent.cc" ]
-
-      configs += [ "//build/config/linux:glib" ]
-    } else {
-      sources -= [ "x11/x11_event_source_glib.cc" ]
-    }
-
     deps += [ "//ui/gfx/x" ]
   } else {
     sources += [
       "platform_event_source_stub.cc",
       "platform_event_stub.cc",
     ]
   }
 }