Remove IPC::ParamTraits for ui::Event.

ui/events/gesture_event_details.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_GESTURE_DETECTION_GESTURE_EVENT_DETAILS_H_
 #define UI_EVENTS_GESTURE_DETECTION_GESTURE_EVENT_DETAILS_H_
 
 #include <string.h>
 
 #include "base/logging.h"
 #include "ui/events/event_constants.h"
 #include "ui/events/events_base_export.h"
 #include "ui/gfx/geometry/rect.h"
 #include "ui/gfx/geometry/rect_conversions.h"
 
-namespace IPC {
-template <class P> struct ParamTraits;
-}
-
 namespace ui {
 
 struct EVENTS_BASE_EXPORT GestureEventDetails {
  public:
   GestureEventDetails();
   explicit GestureEventDetails(EventType type);
   GestureEventDetails(EventType type, float delta_x, float delta_y);
 
   // The caller is responsible for ensuring that the gesture data from |other|
   // is compatible and sufficient for that expected by gestures of |type|.
@@ skipping 165 matching lines @@
       bool right;
       bool up;
       bool down;
     } swipe;
 
     // Tap information must be set for ET_GESTURE_TAP,
     // ET_GESTURE_TAP_UNCONFIRMED, and ET_GESTURE_DOUBLE_TAP events.
     int tap_count;  // TAP repeat count.
   } data_;
 
-  // For mojo native implementation of (de)serialization.
-  friend struct IPC::ParamTraits<ui::GestureEventDetails>;
-  friend struct IPC::ParamTraits<ui::GestureEventDetails::Details>;
-
   GestureDeviceType device_type_;
 
   int touch_points_;  // Number of active touch points in the gesture.
 
   // Bounding box is an axis-aligned rectangle that contains all the
   // enclosing rectangles of the touch-points in the gesture.
   gfx::RectF bounding_box_;
 };
 
 }  // namespace ui
 
 #endif  // UI_EVENTS_GESTURE_DETECTION_GESTURE_EVENT_DETAILS_H_