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

ui/events/ozone/evdev/event_converter_evdev.h

 // 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_EVENT_CONVERTER_EVDEV_H_
 #define UI_EVENTS_OZONE_EVDEV_EVENT_CONVERTER_EVDEV_H_
 
 #include "base/basictypes.h"
 #include "base/bind.h"
 #include "base/memory/scoped_ptr.h"
 #include "ui/events/events_export.h"
 
 namespace ui {
 
 class Event;
 class EventModifiersEvdev;
 
+typedef base::Callback<void(Event*)> EventDispatchCallback;
+
 // Base class for device-specific evdev event conversion.
 class EVENTS_EXPORT EventConverterEvdev {
  public:
   EventConverterEvdev();
+  explicit EventConverterEvdev(const EventDispatchCallback& callback);
   virtual ~EventConverterEvdev();
 
-  void SetDispatchCallback(base::Callback<void(void*)> callback) {
-    dispatch_callback_ = callback;
-  }
-
   // Start converting events.
   virtual void Start() = 0;
 
   // Stop converting events.
   virtual void Stop() = 0;
 
  protected:
   // Dispatches an event using the dispatch-callback set using
   // |SetDispatchCalback()|.
   virtual void DispatchEventToCallback(ui::Event* event);
 
  private:
-  base::Callback<void(void*)> dispatch_callback_;
+  EventDispatchCallback dispatch_callback_;
 
   DISALLOW_COPY_AND_ASSIGN(EventConverterEvdev);
 };
 
 }  // namespace ui
 
 #endif  // UI_EVENTS_OZONE_EVDEV_EVENT_CONVERTER_EVDEV_H_