Handle multiple signin_internal_uis by using a linked_ptr

chrome/browser/ui/webui/signin_internals_ui.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_WEBUI_SIGNIN_INTERNALS_UI_H_
 #define CHROME_BROWSER_UI_WEBUI_SIGNIN_INTERNALS_UI_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
-#include "base/memory/scoped_ptr.h"
 #include "base/values.h"
 #include "components/signin/core/browser/about_signin_internals.h"
 #include "content/public/browser/web_ui_controller.h"
 
 // The implementation for the chrome://signin-internals page.
 class SignInInternalsUI : public content::WebUIController,
                           public AboutSigninInternals::Observer {
  public:
   explicit SignInInternalsUI(content::WebUI* web_ui);
   virtual ~SignInInternalsUI();
 
 
   // content::WebUIController implementation.
   virtual bool OverrideHandleWebUIMessage(const GURL& source_url,
                                           const std::string& name,
                                           const base::ListValue& args) OVERRIDE;
 
   // AboutSigninInternals::Observer::OnSigninStateChanged implementation.
-  virtual void OnSigninStateChanged(
-      scoped_ptr<base::DictionaryValue> info) OVERRIDE;
+  virtual void OnSigninStateChanged(const base::DictionaryValue* info) OVERRIDE;
 
   // Notification that the cookie accounts are ready to be displayed.
   virtual void OnCookieAccountsFetched(
-      scoped_ptr<base::DictionaryValue> info) OVERRIDE;
+      const base::DictionaryValue* info) OVERRIDE;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(SignInInternalsUI);
 };
 
 #endif  // CHROME_BROWSER_UI_WEBUI_SIGNIN_INTERNALS_UI_H_