Simplify infobar expiry.

chrome/browser/media/protected_media_identifier_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_MEDIA_PROTECTED_MEDIA_IDENTIFIER_INFOBAR_DELEGATE_H_
 #define CHROME_BROWSER_MEDIA_PROTECTED_MEDIA_IDENTIFIER_INFOBAR_DELEGATE_H_
 
 #include <string>
 
 #include "components/content_settings/core/common/permission_request_id.h"
@@ skipping 14 matching lines @@
   static infobars::InfoBar* Create(InfoBarService* infobar_service,
                                    PermissionQueueController* controller,
                                    const PermissionRequestID& id,
                                    const GURL& requesting_frame,
                                    const std::string& display_languages);
 
  protected:
   ProtectedMediaIdentifierInfoBarDelegate(PermissionQueueController* controller,
                                           const PermissionRequestID& id,
                                           const GURL& requesting_frame,
-                                          int contents_unique_id,
                                           const std::string& display_languages);
   ~ProtectedMediaIdentifierInfoBarDelegate() override;
 
   // Calls back to the controller to inform it of the user's decision.
   void SetPermission(bool update_content_setting, bool allowed);
 
  private:
   // ConfirmInfoBarDelegate:
   Type GetInfoBarType() const override;
   int GetIconID() const override;
   void InfoBarDismissed() override;
-  bool ShouldExpireInternal(const NavigationDetails& details) const override;
   base::string16 GetMessageText() const override;
   base::string16 GetButtonLabel(InfoBarButton button) const override;
   bool Accept() override;
   bool Cancel() override;
   base::string16 GetLinkText() const override;
   bool LinkClicked(WindowOpenDisposition disposition) override;
 
   PermissionQueueController* controller_;
   const PermissionRequestID id_;
   GURL requesting_frame_;
-  int contents_unique_id_;
   std::string display_languages_;
 
   DISALLOW_COPY_AND_ASSIGN(ProtectedMediaIdentifierInfoBarDelegate);
 };
 
 #endif  // CHROME_BROWSER_MEDIA_PROTECTED_MEDIA_IDENTIFIER_INFOBAR_DELEGATE_H_