[Reland] Enable AutoResize for Constrained Web Dialogs for Mac.

chrome/browser/ui/cocoa/profiles/profile_signin_confirmation_dialog_cocoa.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 CHROME_BROWSER_UI_COCOA_PROFILES_PROFILE_SIGNIN_CONFIRMATION_DIALOG_COCOA_
 #define CHROME_BROWSER_UI_COCOA_PROFILES_PROFILE_SIGNIN_CONFIRMATION_DIALOG_COCOA_
 
 #import <Cocoa/Cocoa.h>
 
 #include <string>
 
 #include "base/callback.h"
 #include "base/compiler_specific.h"
 #include "base/mac/scoped_nsobject.h"
 #include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "chrome/browser/ui/cocoa/constrained_window/constrained_window_mac.h"
 #include "chrome/browser/ui/cocoa/profiles/profile_signin_confirmation_view_controller.h"
 
 class Browser;
 class Profile;
 
 namespace content {
 class WebContents;
 }
@@ skipping 26 matching lines @@
   void Close();
 
  private:
   // ConstrainedWindowMacDelegate:
   void OnConstrainedWindowClosed(ConstrainedWindowMac* window) override;
 
   // Controller for the dialog view.
   base::scoped_nsobject<ProfileSigninConfirmationViewController> controller_;
 
   // The constrained window that contains the dialog view.
-  scoped_ptr<ConstrainedWindowMac> window_;
+  std::unique_ptr<ConstrainedWindowMac> window_;
 
   DISALLOW_COPY_AND_ASSIGN(ProfileSigninConfirmationDialogCocoa);
 };
 
 #endif  // CHROME_BROWSER_UI_COCOA_PROFILES_PROFILE_SIGNIN_CONFIRMATION_DIALOG_COCOA_