wayland: define base:NativeEvent for Wayland

ui/base/wayland/events_wayland.cc

 // Copyright (c) 2011 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.
 
 #include "ui/base/events.h"
 
+#include <linux/input.h>
 #include <X11/extensions/XInput2.h>
 
+#include "base/event_types.h"
 #include "base/logging.h"
 #include "ui/base/keycodes/keyboard_code_conversion_x.h"
-#include "ui/wayland/events/wayland_event.h"
 #include "ui/gfx/point.h"
 
+using namespace base::wayland;
+
+namespace ui {
+
+// These are the mouse events expected. The event type Wayland sends is an
+// evdev event. The following is the correct mapping from evdev to expected
+// events type.
+enum WaylandEventButtonType {
+  LEFT_BUTTON     = BTN_LEFT,
+  MIDDLE_BUTTON   = BTN_RIGHT,
+  RIGHT_BUTTON    = BTN_MIDDLE,
+  SCROLL_UP       = BTN_SIDE,
+  SCROLL_DOWN     = BTN_EXTRA,
+};
+
+} // namespace ui
+
 namespace {
 
 // Scroll amount for each wheelscroll event. 53 is also the value used for GTK+.
 static int kWheelScrollAmount = 53;
 
 int GetEventFlagsFromState(unsigned int state) {
   int flags = 0;
   if (state & ControlMask)
     flags |= ui::EF_CONTROL_DOWN;
   if (state & ShiftMask)
@@ skipping 95 matching lines @@
   return KeyboardCodeFromXKeysym(native_event->key.sym);
 }
 
 bool IsMouseEvent(const base::NativeEvent& native_event) {
   return native_event->type == WAYLAND_BUTTON ||
          native_event->type == WAYLAND_MOTION ||
          native_event->type == WAYLAND_POINTER_FOCUS;
 }
 
 int GetMouseWheelOffset(const base::NativeEvent& native_event) {
-  return native_event->button.button == ui::SCROLL_UP ?
+  return native_event->button.button == SCROLL_UP ?
       kWheelScrollAmount : -kWheelScrollAmount;
 }
 
 }  // namespace ui