Add method for identifying different InfoBars

chrome/browser/android/fullscreen/fullscreen_infobar_delegate.h

 // 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.
 
 #ifndef CHROME_BROWSER_ANDROID_FULLSCREEN_FULLSCREEN_INFOBAR_DELEGATE_H_
 #define CHROME_BROWSER_ANDROID_FULLSCREEN_FULLSCREEN_INFOBAR_DELEGATE_H_
 
 #include <string>
 
 #include "base/android/jni_android.h"
@@ skipping 10 matching lines @@
   static bool RegisterFullscreenInfoBarDelegate(JNIEnv* env);
 
   FullscreenInfoBarDelegate(JNIEnv* env, jobject obj, GURL origin);
   ~FullscreenInfoBarDelegate() override;
 
   // Called to close the infobar.
   void CloseFullscreenInfoBar(JNIEnv* env,
                               const base::android::JavaParamRef<jobject>& obj);
 
   // ConfirmInfoBarDelegate:
+  std::string 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;
 
  private:
   base::android::ScopedJavaGlobalRef<jobject> j_delegate_;
   GURL origin_;
 
   DISALLOW_COPY_AND_ASSIGN(FullscreenInfoBarDelegate);
 };
 
 #endif  // CHROME_BROWSER_ANDROID_FULLSCREEN_FULLSCREEN_INFOBAR_DELEGATE_H_