Add method for identifying different InfoBars

chrome/browser/banners/app_banner_infobar_delegate_desktop.cc

 // Copyright 2015 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.
 
 #include "chrome/browser/banners/app_banner_infobar_delegate_desktop.h"
 
 #include "build/build_config.h"
 #include "chrome/browser/banners/app_banner_data_fetcher_desktop.h"
 #include "chrome/browser/banners/app_banner_metrics.h"
 #include "chrome/browser/banners/app_banner_settings_helper.h"
@@ skipping 76 matching lines @@
   TrackUserResponse(USER_RESPONSE_WEB_APP_ACCEPTED);
   has_user_interaction_ = true;
 
   bookmark_app_helper_->CreateFromAppBanner(
       base::Bind(&AppBannerDataFetcherDesktop::FinishCreateBookmarkApp,
                  fetcher_),
       web_manifest_);
   return true;
 }
 
+infobars::InfoBarDelegate::InfoBarIdentifier
+AppBannerInfoBarDelegateDesktop::GetIdentifier() const {
+  return APP_BANNER_INFOBAR_DELEGATE_DESKTOP;
+}
+
 void AppBannerInfoBarDelegateDesktop::InfoBarDismissed() {
   TrackUserResponse(USER_RESPONSE_WEB_APP_DISMISSED);
   has_user_interaction_ = true;
 
   content::WebContents* web_contents =
       InfoBarService::WebContentsFromInfoBar(infobar());
   if (web_contents) {
     fetcher_.get()->Cancel();
 
     web_contents->GetMainFrame()->Send(
         new ChromeViewMsg_AppBannerDismissed(
             web_contents->GetMainFrame()->GetRoutingID(),
             event_request_id_));
 
     AppBannerSettingsHelper::RecordBannerDismissEvent(
         web_contents, web_manifest_.start_url.spec(),
         AppBannerSettingsHelper::WEB);
   }
 }
 
 }  // namespace banners