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

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

 // 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.
 
 #include "chrome/browser/ui/views/infobars/infobar_container_view.h"
 
 #include "chrome/browser/ui/view_ids.h"
 #include "chrome/browser/ui/views/infobars/infobar_view.h"
 #include "grit/generated_resources.h"
 #include "ui/base/accessibility/accessible_view_state.h"
@@ skipping 26 matching lines @@
     child->SetBounds(0, top, width(), child_height);
     top += child_height;
   }
 }
 
 void InfoBarContainerView::GetAccessibleState(ui::AccessibleViewState* state) {
   state->role = ui::AccessibilityTypes::ROLE_GROUPING;
   state->name = l10n_util::GetStringUTF16(IDS_ACCNAME_INFOBAR_CONTAINER);
 }
 
-void InfoBarContainerView::PlatformSpecificAddInfoBar(InfoBar* infobar) {
-  AddChildView(static_cast<InfoBarView*>(infobar));
+void InfoBarContainerView::PlatformSpecificAddInfoBar(InfoBar* infobar,
+                                                      size_t position) {
+  AddChildViewAt(static_cast<InfoBarView*>(infobar),
+                 static_cast<int>(position));
 }
 
 void InfoBarContainerView::PlatformSpecificRemoveInfoBar(InfoBar* infobar) {
   RemoveChildView(static_cast<InfoBarView*>(infobar));
 }