Add method for identifying different InfoBars

chrome/browser/ui/startup/session_crashed_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_UI_STARTUP_SESSION_CRASHED_INFOBAR_DELEGATE_H_
 #define CHROME_BROWSER_UI_STARTUP_SESSION_CRASHED_INFOBAR_DELEGATE_H_
 
 #include "components/infobars/core/confirm_infobar_delegate.h"
 
 class Browser;
 class Profile;
 
 // A delegate for the InfoBar shown when the previous session has crashed.
 class SessionCrashedInfoBarDelegate : public ConfirmInfoBarDelegate {
  public:
   // If |browser| is not incognito, creates a session crashed infobar and
   // delegate and adds the infobar to the InfoBarService for |browser|.
   static void Create(Browser* browser);
 
  private:
   explicit SessionCrashedInfoBarDelegate(Profile* profile);
   ~SessionCrashedInfoBarDelegate() override;
 
   // ConfirmInfoBarDelegate:
+  std::string GetIdentifier() const override;
   int GetIconId() const override;
   gfx::VectorIconId GetVectorIconId() const override;
   base::string16 GetMessageText() const override;
   int GetButtons() const override;
   base::string16 GetButtonLabel(InfoBarButton button) const override;
   bool Accept() override;
 
   bool accepted_;
   Profile* profile_;
 
   DISALLOW_COPY_AND_ASSIGN(SessionCrashedInfoBarDelegate);
 };
 
 #endif  // CHROME_BROWSER_UI_STARTUP_SESSION_CRASHED_INFOBAR_DELEGATE_H_