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

chrome/browser/ui/cocoa/one_click_signin_dialog_controller.h

 // Copyright (c) 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_ONE_CLICK_SIGNIN_DIALOG_CONTROLLER_H_
 #define CHROME_BROWSER_UI_COCOA_ONE_CLICK_SIGNIN_DIALOG_CONTROLLER_H_
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/mac/scoped_nsobject.h"
-#include "base/memory/scoped_ptr.h"
 #include "chrome/browser/ui/browser_window.h"
 #include "chrome/browser/ui/cocoa/constrained_window/constrained_window_mac.h"
 
 namespace content {
 class WebContents;
 }
 @class OneClickSigninViewController;
 
 // After the user signs into chrome this class is used to display a tab modal
 // signin confirmation dialog.
@@ skipping 13 matching lines @@
 
   ConstrainedWindowMac* constrained_window() const {
     return constrained_window_.get();
   }
 
   OneClickSigninViewController* view_controller() { return view_controller_; }
 
  private:
   void PerformClose();
 
-  scoped_ptr<ConstrainedWindowMac> constrained_window_;
+  std::unique_ptr<ConstrainedWindowMac> constrained_window_;
   base::scoped_nsobject<OneClickSigninViewController> view_controller_;
 };
 
 #endif  // CHROME_BROWSER_UI_COCOA_ONE_CLICK_SIGNIN_DIALOG_CONTROLLER_H_