Replace scoped_ptr with std::unique_ptr in //ui

ui/display/chromeos/x11/native_display_event_dispatcher_x11.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_DISPLAY_CHROMEOS_X11_NATIVE_DISPLAY_EVENT_DISPATCHER_X11_H_
 #define UI_DISPLAY_CHROMEOS_X11_NATIVE_DISPLAY_EVENT_DISPATCHER_X11_H_
 
 #include <stdint.h>
 
 #include "base/macros.h"
@@ skipping 13 matching lines @@
  public:
   NativeDisplayEventDispatcherX11(
       NativeDisplayDelegateX11::HelperDelegate* delegate,
       int xrandr_event_base);
   ~NativeDisplayEventDispatcherX11() override;
 
   // ui::PlatformEventDispatcher:
   bool CanDispatchEvent(const PlatformEvent& event) override;
   uint32_t DispatchEvent(const PlatformEvent& event) override;
 
-  void SetTickClockForTest(scoped_ptr<base::TickClock> tick_clock);
+  void SetTickClockForTest(std::unique_ptr<base::TickClock> tick_clock);
 
   // How long the cached output is valid after startup.
   static const int kUseCacheAfterStartupMs;
 
  private:
   NativeDisplayDelegateX11::HelperDelegate* delegate_;  // Not owned.
 
   // The base of the event numbers used to represent XRandr events used in
   // decoding events regarding output add/remove.
   int xrandr_event_base_;
 
   base::TimeTicks startup_time_;
 
-  scoped_ptr<base::TickClock> tick_clock_;
+  std::unique_ptr<base::TickClock> tick_clock_;
 
   DISALLOW_COPY_AND_ASSIGN(NativeDisplayEventDispatcherX11);
 };
 
 }  // namespace ui
 
 #endif  // UI_DISPLAY_CHROMEOS_X11_NATIVE_DISPLAY_EVENT_DISPATCHER_X11_H_