mojo: Fix double character inserts on Windows by removing a Linux hack.

mojo/mojo_services.gypi

 # Copyright (c) 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.
 
 {
   'targets': [
     {
       # GN version: //mojo/services/dbus_echo:bindings
       'target_name': 'mojo_echo_bindings',
       'type': 'static_library',
@@ skipping 66 matching lines @@
         '../ui/events/events.gyp:events',
         '../ui/gfx/gfx.gyp:gfx_geometry',
         'mojo_base.gyp:mojo_environment_chromium',
         'mojo_input_events_bindings',
         'mojo_geometry_bindings',
         'mojo_geometry_lib',
         '<(mojo_system_for_component)',
       ],
       'sources': [
         'services/public/cpp/input_events/lib/input_events_type_converters.cc',
+        'services/public/cpp/input_events/lib/mojo_extended_key_event_data.cc',
+        'services/public/cpp/input_events/lib/mojo_extended_key_event_data.h',
         'services/public/cpp/input_events/input_events_type_converters.h',
         'services/public/cpp/input_events/mojo_input_events_export.h',
       ],
     },
     {
       # GN version: //mojo/services/public/interfaces/input_events
       'target_name': 'mojo_input_events_bindings',
       'type': 'static_library',
       'sources': [
         'services/public/interfaces/input_events/input_event_constants.mojom',
@@ skipping 798 matching lines @@
             'mojo_echo_bindings',
           ],
           'sources': [
             'services/dbus_echo/dbus_echo_service.cc',
           ],
         },
       ],
     }],
   ],
 }