ozone: evdev: Add libgestures bindings for touchpad & mouse support

ui/events/ozone/evdev/gestures/gesture_logging.h

Index: ui/events/ozone/evdev/gestures/gesture_logging.h
diff --git a/ui/events/ozone/evdev/gestures/gesture_logging.h b/ui/events/ozone/evdev/gestures/gesture_logging.h
new file mode 100644
index 0000000000000000000000000000000000000000..4c4412fe78d4febaefb937c4928823ac863547d7
--- /dev/null
+++ b/ui/events/ozone/evdev/gestures/gesture_logging.h
@@ -0,0 +1,13 @@
+// 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.
+
+#ifndef UI_EVENTS_OZONE_EVDEV_GESTURES_GESTURE_LOGGING_H_
+#define UI_EVENTS_OZONE_EVDEV_GESTURES_GESTURE_LOGGING_H_
+
+// libgestures.so binds to this function for logging.
+// TODO(spang): Fix libgestures to not require this.
+extern "C" __attribute__((visibility("default")))
+void gestures_log(int verb, const char* fmt, ...);
+
+#endif  // UI_EVENTS_OZONE_EVDEV_GESTURES_GESTURE_LOGGING_H_