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

chrome/browser/extensions/extension_infobar_delegate.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_EXTENSIONS_EXTENSION_INFOBAR_DELEGATE_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_INFOBAR_DELEGATE_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "chrome/browser/api/infobars/confirm_infobar_delegate.h"
 #include "content/public/browser/notification_observer.h"
@@ skipping 15 matching lines @@
  public:
   // The observer for when the delegate dies.
   class DelegateObserver {
    public:
     virtual void OnDelegateDeleted() = 0;
 
    protected:
     virtual ~DelegateObserver() {}
   };
 
-  ExtensionInfoBarDelegate(Browser* browser,
-                           InfoBarService* infobar_service,
-                           const extensions::Extension* extension,
-                           const GURL& url,
-                           int height);
+  virtual ~ExtensionInfoBarDelegate();
+
+  // Creates an extension delegate and adds it to |infobar_service|.
+  static void Create(InfoBarService* infobar_service,
+                     Browser* browser,
+                     const extensions::Extension* extension,
+                     const GURL& url,
+                     int height);
 
   const extensions::Extension* extension() { return extension_; }
   extensions::ExtensionHost* extension_host() { return extension_host_.get(); }
   int height() { return height_; }
 
   void set_observer(DelegateObserver* observer) { observer_ = observer; }
 
   bool closing() const { return closing_; }
 
  private:
-  virtual ~ExtensionInfoBarDelegate();
+  ExtensionInfoBarDelegate(Browser* browser,
+                           InfoBarService* infobar_service,
+                           const extensions::Extension* extension,
+                           const GURL& url,
+                           int height);
 
   // InfoBarDelegate:
   virtual InfoBar* CreateInfoBar(InfoBarService* owner) OVERRIDE;
   virtual bool EqualsDelegate(InfoBarDelegate* delegate) const OVERRIDE;
   virtual void InfoBarDismissed() OVERRIDE;
   virtual Type GetInfoBarType() const OVERRIDE;
   virtual ExtensionInfoBarDelegate* AsExtensionInfoBarDelegate() OVERRIDE;
 
   // content::NotificationObserver:
   virtual void Observe(int type,
@@ skipping 18 matching lines @@
   int height_;
 
   // Whether we are currently animating to close. This is used to ignore
   // ExtensionView::PreferredSizeChanged notifications.
   bool closing_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionInfoBarDelegate);
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_INFOBAR_DELEGATE_H_