Change ShowConfirmBubble() to take model by scoped_ptr.

chrome/browser/ui/confirm_bubble.h

 // Copyright (c) 2012 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_CONFIRM_BUBBLE_H_
 #define CHROME_BROWSER_UI_CONFIRM_BUBBLE_H_
 
+#include "base/memory/scoped_ptr.h"
 #include "ui/gfx/native_widget_types.h"
 
 class ConfirmBubbleModel;
 
 namespace gfx {
 class Point;
 }
 
 namespace chrome {
 
 // Creates a bubble and shows it with its top center at the specified
 // |origin|. A bubble created by this function takes ownership of the
 // specified |model|.
 void ShowConfirmBubble(gfx::NativeWindow window,
                        gfx::NativeView anchor_view,
                        const gfx::Point& origin,
-                       ConfirmBubbleModel* model);
+                       scoped_ptr<ConfirmBubbleModel> model);
 
 }  // namespace chrome
 
 #endif  // CHROME_BROWSER_UI_CONFIRM_BUBBLE_H_