Change infobar creation to use a public static Create() method on the infobar delegate classes.

chrome/browser/ui/cocoa/infobars/infobar_container_controller.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_COCOA_INFOBARS_INFOBAR_CONTAINER_CONTROLLER_H_
 #define CHROME_BROWSER_UI_COCOA_INFOBARS_INFOBAR_CONTAINER_CONTROLLER_H_
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/memory/scoped_nsobject.h"
@@ skipping 109 matching lines @@
 // Positions the infobar views in the container view and notifies
 // |browser_controller_| that it needs to resize the container view.
 - (void)positionInfoBarsAndRedraw;
 
 @end
 
 
 @interface InfoBarContainerController (JustForTesting)
 
 // Removes all infobar views.  Infobars which were already closing will be
-// completely closed (i.e. InfobarDelegate::InfoBarClosed() will be called and
-// we'll get a callback to removeController).  Other infobars will simply stop
-// animating and disappear.  Callers must call positionInfoBarsAndRedraw()
-// after calling this method.
+// completely closed (i.e. the InfoBarDelegate will be deleted and we'll get a
+// callback to removeController).  Other infobars will simply stop animating and
+// disappear.  Callers must call positionInfoBarsAndRedraw() after calling this
+// method.
 - (void)removeAllInfoBars;
 
 @end
 
 #endif  // CHROME_BROWSER_UI_COCOA_INFOBARS_INFOBAR_CONTAINER_CONTROLLER_H_