When replacing an infobar, maintain the old infobar's position.

chrome/browser/ui/views/infobars/infobar_container_view.h

 // Copyright (c) 2011 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_VIEWS_INFOBARS_INFOBAR_CONTAINER_VIEW_H_
 #define CHROME_BROWSER_UI_VIEWS_INFOBARS_INFOBAR_CONTAINER_VIEW_H_
 #pragma once
 
 #include "chrome/browser/tab_contents/infobar_container.h"
 #include "chrome/browser/ui/views/accessible_pane_view.h"
 
 // The views-specific implementation of InfoBarContainer.
 class InfoBarContainerView : public AccessiblePaneView,
                              public InfoBarContainer {
  public:
   explicit InfoBarContainerView(Delegate* delegate);
   virtual ~InfoBarContainerView();
 
  private:
   // AccessiblePaneView:
   virtual gfx::Size GetPreferredSize() OVERRIDE;
   virtual void Layout() OVERRIDE;
   virtual void GetAccessibleState(ui::AccessibleViewState* state) OVERRIDE;
 
   // InfobarContainer:
-  virtual void PlatformSpecificAddInfoBar(InfoBar* infobar) OVERRIDE;
+  virtual void PlatformSpecificAddInfoBar(InfoBar* infobar,
+                                          size_t position) OVERRIDE;
   virtual void PlatformSpecificRemoveInfoBar(InfoBar* infobar) OVERRIDE;
 
   DISALLOW_COPY_AND_ASSIGN(InfoBarContainerView);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_INFOBARS_INFOBAR_CONTAINER_VIEW_H_