Remove unused linked_ptr inclusion

ui/events/gestures/gesture_recognizer_impl.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_GESTURES_GESTURE_RECOGNIZER_IMPL_H_
 #define UI_EVENTS_GESTURES_GESTURE_RECOGNIZER_IMPL_H_
 
 #include <stdint.h>
 
 #include <map>
 #include <memory>
 #include <vector>
 
 #include "base/macros.h"
-#include "base/memory/linked_ptr.h"
 #include "ui/events/event_constants.h"
 #include "ui/events/events_export.h"
 #include "ui/events/gestures/gesture_provider_aura.h"
 #include "ui/events/gestures/gesture_recognizer.h"
 #include "ui/gfx/geometry/point.h"
 
 namespace ui {
 class GestureConsumer;
 class GestureEvent;
 class GestureEventHelper;
@@ skipping 73 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(GestureRecognizerImpl);
 };
 
 // Provided only for testing:
 EVENTS_EXPORT void SetGestureRecognizerForTesting(
     GestureRecognizer* gesture_recognizer);
 
 }  // namespace ui
 
 #endif  // UI_EVENTS_GESTURES_GESTURE_RECOGNIZER_IMPL_H_