Add method for identifying different InfoBars

chrome/browser/ui/android/content_settings/popup_blocked_infobar_delegate.h

 // Copyright 2013 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_ANDROID_CONTENT_SETTINGS_POPUP_BLOCKED_INFOBAR_DELEGATE_H_
 #define CHROME_BROWSER_UI_ANDROID_CONTENT_SETTINGS_POPUP_BLOCKED_INFOBAR_DELEGATE_H_
 
 #include "components/infobars/core/confirm_infobar_delegate.h"
 #include "url/gurl.h"
 
@@ skipping 10 matching lines @@
   static void Create(content::WebContents* web_contents, int num_popups);
 
   ~PopupBlockedInfoBarDelegate() override;
 
  private:
   PopupBlockedInfoBarDelegate(int num_popups,
                               const GURL& url,
                               HostContentSettingsMap* map);
 
   // ConfirmInfoBarDelegate:
+  std::string GetIdentifier() const override;
   int GetIconId() const override;
   PopupBlockedInfoBarDelegate* AsPopupBlockedInfoBarDelegate() override;
   base::string16 GetMessageText() const override;
   int GetButtons() const override;
   base::string16 GetButtonLabel(InfoBarButton button) const override;
   bool Accept() override;
 
   int num_popups_;
   GURL url_;
   HostContentSettingsMap* map_;
   bool can_show_popups_;
 
   DISALLOW_COPY_AND_ASSIGN(PopupBlockedInfoBarDelegate);
 };
 
 #endif  // CHROME_BROWSER_UI_ANDROID_CONTENT_SETTINGS_POPUP_BLOCKED_INFOBAR_DELEGATE_H_