Add method for identifying different InfoBars

chrome/browser/media/media_stream_infobar_delegate_android.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_MEDIA_MEDIA_STREAM_INFOBAR_DELEGATE_ANDROID_H_
 #define CHROME_BROWSER_MEDIA_MEDIA_STREAM_INFOBAR_DELEGATE_ANDROID_H_
 
 #include <string>
 
 #include "base/compiler_specific.h"
@@ skipping 20 matching lines @@
   bool IsRequestingVideoAccess() const;
   bool IsRequestingMicrophoneAccess() const;
 
  private:
   friend class WebRtcTestBase;
 
   explicit MediaStreamInfoBarDelegateAndroid(
       scoped_ptr<MediaStreamDevicesController> controller);
 
   // ConfirmInfoBarDelegate:
+  std::string GetIdentifier() const override;
   Type GetInfoBarType() const override;
   int GetIconId() const override;
   void InfoBarDismissed() override;
   MediaStreamInfoBarDelegateAndroid* AsMediaStreamInfoBarDelegateAndroid()
       override;
   base::string16 GetMessageText() const override;
   base::string16 GetButtonLabel(InfoBarButton button) const override;
   bool Accept() override;
   bool Cancel() override;
   base::string16 GetLinkText() const override;
   GURL GetLinkURL() const override;
 
   scoped_ptr<MediaStreamDevicesController> controller_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaStreamInfoBarDelegateAndroid);
 };
 
 #endif  // CHROME_BROWSER_MEDIA_MEDIA_STREAM_INFOBAR_DELEGATE_ANDROID_H_