Replace scoped_ptr with std::unique_ptr in //ui

ui/base/clipboard/clipboard_aurax11.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_BASE_CLIPBOARD_CLIPBOARD_AURAX11_H_
 #define UI_BASE_CLIPBOARD_CLIPBOARD_AURAX11_H_
 
-#include "ui/base/clipboard/clipboard.h"
-
 #include <stddef.h>
 #include <stdint.h>
 
+#include <memory>
+
 #include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
+#include "ui/base/clipboard/clipboard.h"
 
 namespace ui {
 
 class ClipboardAuraX11 : public Clipboard {
  private:
   friend class Clipboard;
 
   ClipboardAuraX11();
   ~ClipboardAuraX11() override;
 
@@ skipping 32 matching lines @@
                      size_t url_len) override;
   void WriteWebSmartPaste() override;
   void WriteBitmap(const SkBitmap& bitmap) override;
   void WriteData(const FormatType& format,
                  const char* data_data,
                  size_t data_len) override;
 
   // TODO(dcheng): Is this still needed now that each platform clipboard has its
   // own class derived from Clipboard?
   class AuraX11Details;
-  scoped_ptr<AuraX11Details> aurax11_details_;
+  std::unique_ptr<AuraX11Details> aurax11_details_;
 
   DISALLOW_COPY_AND_ASSIGN(ClipboardAuraX11);
 };
 
 }  // namespace ui
 
 #endif  // UI_BASE_CLIPBOARD_CLIPBOARD_AURAX11_H_