Add method for identifying different InfoBars

chrome/browser/download/download_request_infobar_delegate_android.h

 // Copyright (c) 2011 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_DOWNLOAD_DOWNLOAD_REQUEST_INFOBAR_DELEGATE_ANDROID_H_
 #define CHROME_BROWSER_DOWNLOAD_DOWNLOAD_REQUEST_INFOBAR_DELEGATE_ANDROID_H_
 
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "chrome/browser/download/download_request_limiter.h"
@@ skipping 29 matching lines @@
 
   static void SetCallbackForTesting(FakeCreateCallback* callback);
 
  private:
   static FakeCreateCallback* callback_;
 
   explicit DownloadRequestInfoBarDelegateAndroid(
       base::WeakPtr<DownloadRequestLimiter::TabDownloadState> host);
 
   // ConfirmInfoBarDelegate:
+  infobars::InfoBarDelegate::InfoBarIdentifier GetIdentifier() const override;
   int GetIconId() const override;
   base::string16 GetMessageText() const override;
   base::string16 GetButtonLabel(InfoBarButton button) const override;
   bool Accept() override;
   bool Cancel() override;
 
   bool responded_;
   base::WeakPtr<DownloadRequestLimiter::TabDownloadState> host_;
 
   DISALLOW_COPY_AND_ASSIGN(DownloadRequestInfoBarDelegateAndroid);
 };
 
 #endif  // CHROME_BROWSER_DOWNLOAD_DOWNLOAD_REQUEST_INFOBAR_DELEGATE_ANDROID_H_