Prevent TouchEvent Crash on X

ui/events/event.h

 // Copyright (c) 2012 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_EVENT_H_
 #define UI_EVENTS_EVENT_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/event_types.h"
@@ skipping 497 matching lines @@
   TouchEvent(EventType type,
              const gfx::PointF& location,
              int flags,
              int touch_id,
              base::TimeDelta timestamp,
              float radius_x,
              float radius_y,
              float angle,
              float force);
 
+  TouchEvent(const TouchEvent& copy);
+
   ~TouchEvent() override;
 
   // The id of the pointer this event modifies.
   int touch_id() const { return touch_id_; }
   // A unique identifier for this event.
   uint64 unique_event_id() const { return unique_event_id_; }
   // If we aren't provided with a radius on one axis, use the
   // information from the other axis.
   float radius_x() const { return radius_x_ > 0 ? radius_x_ : radius_y_; }
   float radius_y() const { return radius_y_ > 0 ? radius_y_ : radius_x_; }
@@ skipping 353 matching lines @@
 
   const GestureEventDetails& details() const { return details_; }
 
  private:
   GestureEventDetails details_;
 };
 
 }  // namespace ui
 
 #endif  // UI_EVENTS_EVENT_H_