Convert //chrome/browser/ui from scoped_ptr to std::unique_ptr

chrome/browser/ui/cocoa/media_picker/desktop_media_picker_cocoa.h

 // Copyright 2013 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 CHROME_BROWSER_UI_COCOA_MEDIA_PICKER_DESKTOP_MEDIA_PICKER_COCOA_H_
 #define CHROME_BROWSER_UI_COCOA_MEDIA_PICKER_DESKTOP_MEDIA_PICKER_COCOA_H_
 
 #import "base/mac/scoped_nsobject.h"
 #include "chrome/browser/media/desktop_media_picker.h"
 
 @class DesktopMediaPickerController;
 
 // Cocoa's DesktopMediaPicker implementation.
 class DesktopMediaPickerCocoa : public DesktopMediaPicker {
  public:
   DesktopMediaPickerCocoa();
   ~DesktopMediaPickerCocoa() override;
 
   // Overridden from DesktopMediaPicker:
   void Show(content::WebContents* web_contents,
             gfx::NativeWindow context,
             gfx::NativeWindow parent,
             const base::string16& app_name,
             const base::string16& target_name,
-            scoped_ptr<DesktopMediaList> media_list,
+            std::unique_ptr<DesktopMediaList> media_list,
             bool request_audio,
             const DoneCallback& done_callback) override;
 
  private:
   base::scoped_nsobject<DesktopMediaPickerController> controller_;
 };
 
 #endif  // CHROME_BROWSER_UI_COCOA_MEDIA_PICKER_DESKTOP_MEDIA_PICKER_COCOA_H_