clutter: Move evdev input to src/backends/native

The end goal is to have all clutter backend code in src/backends. Input
is the larger chunk of it, which is now part of our specific
MutterClutterBackendNative, this extends to device manager, input devices,
tools and keymap.

This was supposed to be nice and incremental, but there's no sane way
to cut this through. As a result of the refactor, a number of private
Clutter functions are now exported for external backends to be possible.

https://gitlab.gnome.org/GNOME/mutter/merge_requests/672

src/backends/native/meta-virtual-input-device-native.h

@@ -0,0 +1,31 @@
+/*
+ * Copyright (C) 2016  Red Hat Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library. If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Author: Jonas Ådahl <jadahl@gmail.com>
+ */
+
+#ifndef META_VIRTUAL_INPUT_DEVICE_NATIVE_H
+#define META_VIRTUAL_INPUT_DEVICE_NATIVE_H
+
+#include "clutter/clutter-virtual-input-device.h"
+
+#define META_TYPE_VIRTUAL_INPUT_DEVICE_NATIVE (meta_virtual_input_device_native_get_type ())
+G_DECLARE_FINAL_TYPE (MetaVirtualInputDeviceNative,
+                      meta_virtual_input_device_native,
+                      META, VIRTUAL_INPUT_DEVICE_NATIVE,
+                      ClutterVirtualInputDevice)
+
+#endif /* META_VIRTUAL_INPUT_DEVICE_NATIVE_H */